summary
乔旭升，男，1980年出生，2007年于浙江大学获工学博士，毕业后留校任教。浙江大学材料学院副教授，博导，"求是"青年****，杭州市硅酸盐学会秘书长，中国稀土学会光电材料与器件专委会理事兼副秘书长、中国硅酸盐学会特种玻璃分会理事、中国硅酸盐学会电子玻璃分会理事。主要从事发光功能材料方面的教学与科研工作。作为项目负责人先后承担或参与了10多项国家自然科学基金面上项目、军工项目、国际合作项目和省科技计划项目。已在Angew. Chem. Int. Ed., Appl. Phys. Lett.和 J. Mater. Chem. C等国际期刊已发表SCI收录论文100多篇，SCI论文他人引用1500多次。开设课程：《固态照明材料》和《固体化学》。曾于2008年、2010年、2013年分别赴法国 Rennes I大学玻璃与陶瓷实验室、德国Kiel大学材料科学与工程学系和美国北得克萨斯大学从事有关玻璃与玻璃陶瓷光电性能、微结构和材料计算的合作研究。曾多次受邀在PNCS、ICG等国际会议上做邀请报告。
研究领域
1.光子与光电子功能材料:
(1)无机玻璃、玻璃陶瓷与光子功能器件；
(2)硫系半导体低维材料与光电子器件；
(3)掺杂纳米晶、微米晶荧光材料与器件；
2.材料合成与制备：
(1)玻璃晶化与玻璃分相；
(2)微纳米材料的湿化学合成；
(3)溶胶-凝胶。
3.材料计算：
(1)分子动力学模拟；
(2)第一性原理计算；
(3)发光动力学计算。
最新动态 Last updated on DEC 25, 2020
2020年12月，一种多色银量子团簇掺杂多相荧光玻璃及其制备方法, 专利授权。
2020年9月，祝贺课题组何梦婷同学关于玻璃陶瓷荧光粉的综述被Ceramics International 接受。M. He，J. Jia，J. Zhao，X. Qiao，J. Du，X. Fan, Glass-ceramic phosphors for solid state lighting: A review, Ceramics International , 09(2020):227
Solid state lighting, including phosphor converted light-emitting diodes (LEDs) and laser diodes (LDs), have released high demand to develop thermally stable phosphors. For this purpose, inorganic glass-ceramics (GCs) embedded with phosphor particles can act as competitive candidates. They are superior to traditional phosphors or resin\/silica composites through successfully overcoming thermal aging and color temperature drifting problems and simultaneously maintaining high luminescent efficiencies. Inorganic GC phosphors can be classified into devitrified glass-ceramics, PiG (Phosphor-in-Glass) and sintered glass-ceramics. This review summarized the recent progress on LED\/LD GC phosphors from the aspects of design principles, synthesis methods, microstructure-property relationships and their application studies. In addition, some challenging issues (e.g., crystallization behavior of luminous phase in glass, corrosion behavior of phosphor by glass matrix) are also discussed in detail. Significant issues of glass-ceramics packed LED\/LD, such as luminescence efficiency, chromaticity, correlated color temperature and color gamut, are sorted out as well. Potential research directions are further suggested for not only developing new glass-ceramic phosphors but feeding upon various practical application.
2020年8月，祝贺课题组Abhishek Wadhwa同学关于氟化物玻璃的论文被Journal of Non-Crystalline Solids接受。 A. Wadhwa, P.Awasthi, K. Ren, X. Xu, X. Qiao, X.Fan, G. Qian, Selective enrichment of Ln3+ (Ln = Yb; Er) and Cr3+ into SrF2 and ZnAl2O4 nanocrystals precipitated in fluorosilicate glass-ceramics: A dual mode optical temperature sensing study, Journal of Non-Crystalline Solids, 552(2021): 120395。
The dual mode optical thermometry offers precise temperature sensing with self-calibration merit. To realise this, an oxy-fluoride precursor glass was transformed to a semi-transparent glass-ceramic having simultaneously precipitated SrF2:Yb3+\/Er3+ and ZnAl2O4:Cr3+ phases. Under 980 nm excitation, intense green up-conversion (UC) luminescence of Er3+: 2H11\/2, 4S3\/2 → 4I15\/2 and under 535 nm excitation, enhanced red down-conversion (DC) luminescence lifetime of Cr3+: 2E, 4T2 → 4A2 was realized. Both the UC and DC transitions were highly reliant upon temperature. The fluorescence intensity ratio (FIR) study of erbium's thermally coupled energy states (2H11\/2 and 4S3\/2) produced maximum temperature sensing sensitivity values of 1.11% K?1 at 334 K and 0.66% K?1 at 275 K, respectively. Likewise, temperature dependent luminescence lifetime of Cr3+ attributed to the transitions arising from the parity forbidden (2E → 4A2) and spin allowed (4T2 → 4A2) relaxations produced maximum temperature sensing sensitivity value equal to 0.19% K?1 at 435 K.
2020年8月，祝贺课题组任锴同学关于银量子团簇发光玻璃的论文被Phys. Chem. Chem. Phys 接受。K. Ren , X. Xu, Z. Yao, X. Chen, T. Hu , P.g Li , X. Fan , J. Du, X. Qiao and G. Qian, Temperature dependent molecular fluorescence of [Agm]n+ quantum clusters stabilized by phosphate glass networks,Phys. Chem. Chem. Phys, 22(2020), 21307-21316
Molecule like silver quantum clusters ([Agm]n+ QCs) exhibit an ultrasmall size confinement resulting in efficient broadband fluorescence. However, free [Agm]n+ QCs are also chemically active, so their stabilization is required for practical applications. We report in this work a phosphate oxyfluoride glass network enabled stabilization strategy of [Agm]n+ QCs. A series of silver-doped P2O5–ZnF2–xAg glasses were prepared by a conventional melt-and-quench method. The NMR and XPS results reveal that two types of [P(O,F)4] tetrahedrons (Q1, Q2) form chain structures and Zn(IV) connects [P(O,F)4] chains into a 3-dimension network in the glasses. The frameworks with limited void spaces were designed to restrict the polymerization degree, m, of [Agm]n+ QCs; the negatively charged tetrahedrons were designed to restrict the charge, n, of [Agm]n+ QCs. Through optical and mass spectroscopy studies, silver quantum clusters, [Ag2]2+ and [Ag4]2+, were identified to be charge compensated by [ZnO4] tetrahedrons and surrounded with [P(O,F)4] complex anions. The fluorescence thus gives high quantum efficiencies of 55.2% and 83.4%, for P2O5–ZnF2–xAg glass stabilized [Ag2]2+ and [Ag4]2+ QCs, respectively. This further reveals that the peak fixed fluorescence of [Ag2]2+ and [Ag4]2+ can be described by molecular fluorescence mechanisms. These are parity-allowed singlet–singlet transitions (S1 - S0), parity-forbidden triplet–singlet transitions (T1 - S0) and intersystem crossings between singlets (S1) and triplets (T1). The phonon coupled intersystem crossing between singlets (S1) and triplets (T1) determines the phosphate stabilized [Ag4]2+ QCs to exhibit a series of temperature dependent fluorescence behaviors. These include fluorescence intensity (at 50–200 K), intensity ratio (FIR) (at 50–200 K), peak shift (at 100–300 K) and lifetime (at 300–450 K) with maximum sensitivities of 1.27% K-1, 0.94% K-1, 0.29% K-1 and 0.41% K-1, respectively. Therefore, phosphate stabilized [Ag4]2+ QCs can be applied as temperature sensing probes, especially at low temperatures (10–300 K) and for color-based visualized temperature sensors.
2020年6月，一种硼氧网络稳定的可见波段可调荧光银量子团簇掺杂无机玻璃及其制备方法, 专利授权。
2020年6月，一种利用锌氧四面体电荷平衡的银量子团簇掺杂蓝绿荧光玻璃及其制备方法, 专利授权。
2020年6月，一种基于非桥氧配位的绿白荧光银量子团簇掺杂氟磷酸盐玻璃及其制备方法, 专利授权。
2020年5月，一种铕掺杂微球形荧光粉及其制备方法, 专利授权。
2020年4月，祝贺课题组徐秀瑕同学关于Ca2+\/Sr2+\/Ba2+ 发光玻璃的论文被Journal of the American ceramic society 接受。X. Xu, J. Zhao, X. Chen, Q. Xu, T.Wang, S. Yu, X. Xu, X. Qiao, J. Du, X. Fan, J. Qiu, G. Qian, Ca2+\/Sr2+\/Ba2+ dependent phase separation, nanocrystallization and photoluminescence in fluoroaluminosilicate glass, Journal of the American ceramic society, 103(2020):5796–5807.
Fluoride phase separation is the initial stage of nanocrystallization in oxyfluoride glasses, and it is a key step in achieving transparent glass-ceramics with good luminescence. In this work, we combine molecular dynamics (MD) simulations and experimental studies to investigate the phase separation, nanocrystallization and photoluminescence in fluoroaluminosilicate glass and glass-ceramics containing alkali earth fluoride (MF2). The results reveal different phase separation behaviors due to the field strength difference of M2+. The composition and size similarity between the fluoride-rich regions in the MD simulated glass and the fluoride nanocrystals in the experimental prepared glass-ceramics are observed, suggesting that the separated fluoride phase is the structural origin of the observed MF2 nanocrystals. Besides, in order to understand the M2+ dependent glass structural features, the crystallization temperatures, the luminescent properties of Eu3+ and Eu2+ doped glass-ceramics, and the lasing performance of Er3+ doped glass-ceramics are discussed. Based on these comprehensions, some strategies are proposed to help to efficiently design oxyfluoride glass with desired luminescence performance.
2020年2月 祝贺课题组赵飞宇同学关于GeSe低维材料的论文在CHEMPHYCHEM上发表。Feiyu Zhao,[a] Xue Luo,[a] Lixiang Liu,[b] Jianhang Lv,[b] Xianping Fan,*[a] Xvsheng Qiao,*[a]Yang Xu,*[a, b] Lorenz Kienle,[c] Xianghua Zhang,[d] and Guodong Qian[a]. “Visible-NIR Photodetectors Based on Low-Dimensional GeSe Micro-Crystals: Designed Morphology and Improved Photoresponsivity”. ChemPhysChem 2020, DOI: 10.1002\/cphc.
GeSe micro-sheets and micro-belts have been synthesized by a facile one-pot wet chemical method in 1-octadecene solvent and oleic acid solvent, respectively. The adsorption of more oleic acid molecules on the (002) plane promoted growth along [010] direction of the GeSe micro-belts and limited carrier transport in this direction, resulting in higher carrier concentration and mobility of the GeSe micro-belts. The performance of the photodetectors based on the single GeSe micro-sheet and the single GeSe micro-belt was investigated under illumination at 532 nm, 980 nm and 1319 nm. Both, photodetectors based on a single GeSe micro-sheet and a single GeSe micro-belt, exhibit a high photoresponse, short response\/ recovery times, and long-term durability. Moreover, the photodetector based on a single GeSe micro-belt displays a broadband response with a high responsivity (5562 A\/W at 532 nm, 1546 A\/W at 980 nm) and detectivity (3.01×1012 Jones at 532 nm, 8.38×1011 Jones at 980 nm). These excellent characteristics render single GeSe micro-belts very interesting for use as highly efficient photodetectors, especially in the NIR region.
2019年11月中国计量大学张军杰研究员来访（钱江****），作关于“中红外激光玻璃光纤材料”的邀请报告。
2019年11月 受邀参加FRIMS Symposium国际会议(日本),作题为 Inorganic Glass Stabilized Fluorescent [Agm]n+ Quantum Clusters的国际会议邀请报告。
2019年11月 受邀参加国际功能材料大会(NCFM & MFMS & INM 2019，重庆),作题为 Prediction of Structure and Crystallization of Oxyfluoride Glass via MD Simulation的国际会议邀请报告。
2019年11月 受邀参加International Symposiums for Phosphor Materials (Phosphor Safari 2019)国际会议(厦门),作题为 Spherical phosphor composited glass-ceramics for white LD lighting的国际会议邀请报告。
2019年9月 德国基尔大学Lorenz Kienle教授来访，作关于“Complex nanostructured materials”的学术报告。
2019年9月 祝贺课题组孙薪雯同学关于稀土离子发光应用基础研究的论文被CrystEngComm 接受。Xinwen Sun, Xinwei Wang, Bing Chen, Feiyu Zhao, Xiuxia Xu, Kai Ren, unhao Lu, Xvsheng Qiao, Guodong Qian and Xianping Fan(2019). "Phase and morphology evolution of luminescent NaLnF4 (Ln = La to Yb) micro-crystals: understanding the ionic radii and surface energy-dependent solution growth mechanism." CrystEngComm 2019,21, 6652-6658.
Lanthanide (Ln)-based NaLnF4 micro-crystals (MCs) exhibit great advantages and strong feasibility for integration into micron-sized photonic devices. However, there is still a lack of thermodynamic understanding of the solution growth mechanisms of NaLnF4 MCs. Herein, we report the preparation of hexagonal NaLnF4 MCs with various morphologies (rod-, disk- and flake-like) and crystal sizes (100 nm to 10 μm) via a hydrothermal route. The morphologies and sizes of NaLnF4 MCs were revealed to be highly dependent on the ionic radius of different Ln3+ ions. We have proposed a ligand-adsorption-driven oriented growth model and a surface energy dominant nucleation model to interpret the above phenomena. First, the citrate (Cit3−) adsorption on the {101ˉ0} lattice plane primarily leads to different morphologies of NaLnF4 MCs. Second, different surface energies are required for nucleation and are responsible for crystal size evolution from NaYbF4 to LaF3. Third, alternative phase types from NaLnF4 to LnF3 are related to the Ln–F bond energy and Goldschmidt's law of crystal chemistry. In addition, the surface ligand removal is beneficial for the luminescence enhancement of NaLnF4 MCs. These results provide a thermodynamic understanding for researchers to develop NaLnF4 MCs with targeted morphology and size
2019年9月 祝贺课题组赵君婕同学关于BaF2\/Ba1 – XRXF2 + X\/RF3发光玻璃的论文被Advanced Theory and Simulations接受。Junjie Zhao, Xiuxia Xu, Kai Ren, Zhou Luo, Xvsheng Qiao,* Jincheng Du,* Jianbei Qiu, Xianping Fan, and Guodong Qian (2019). " Structural Origins of Baf2\/Ba1 – XRXF2 + X\/Rf3 Nanocrystals Formation from Phase Separated Fluoroaluminosilicate Glass: A Molecular Dynamic Simulation Study." Advanced Theory and Simulations 2019, **.
Fluoroaluminosilicate glass-ceramics with M1 − x RxF2 + x (M2+: Sr2+, Ba2+,R3+: rare earth ions) crystals are novel host materials for luminescence applications. However, the preparation of such materials is still a trial-error based approach due to the lack of detailed glass structure understanding. In this work, the authors study the phase separation and potential nanocrystal formation in a series of Ba2+ and La3+ containing fluoroaluminosilicate glasses by molecular dynamics (MD) simulations. Fluoride phase separation is observed from all simulated glass samples. With gradual LaF3 to BaF2 substitution, the cations enrichment changes from Ba2+, to Ba2+ and La3+, and finally La3+ in the fluoride-rich regions. Besides, the competition between Al3+ and La3+ in fluoride phase and the consequently redistribution of Al3+ and Na+ into oxide phase are observed, which can change the local environment of luminescent centers, affecting luminescence. An experimental support to this phenomenon is given. Therefore, MD simulation with effective potentials can be a practical method to study the structural origins of nanocrystal from fluoride phase separation as well as to study the structure-property relationship in fluoroaluminosilicate glass. The simulation driven glass structure and crystal phase exploration can thus become an effective method in designing glass-ceramics for luminescence and other applications.
2019年7月 美国北德克萨斯州大学杜金成教授来访，作关于“Glass genome: a material genome approach in glass science and its application”的学术报告。
2019年6月 受邀参加25th ICG国际会议(美国，波士顿),作题为 Phase Separation and Crystallization Strategies to Construct Multiphase Glass-ceramics to Stabilize Molecular [Agm]n+ Quantum Clusters的国际会议邀请报告。
2019年6月 祝贺课题组赵君婕同学关于发光玻璃计算模型的论文被Journal of the European Ceramic Society接受。Junjie Zhaoa,b, Xiuxia Xua,b, Xiaotong Chen, Qian Xua, Zhou Luo, Xvsheng Qiao, Jincheng Dub, Xianping Fan, Guodong Qian (2019). " A Structure Model for Phase Separated Fluoroaluminosilicate Glass System by Molecular Dynamic Simulations." Journal of the European Ceramic Society.2019.06.042.
Oxyfluoride glass and glass ceramics have been widely used in optical devices with Ln3+ doping. Especially,fluoride phase separation is considered as the initial stage of nanocrystallization that can help to realize the controllable crystallization and also provide the low phonon energy environment in oxyfluoride glass. Therefore,a structure model to describe this phase separated glass system is in great help for designing optical materials with high luminescence. In this study, large-scale molecular dynamics (MD) simulations were performed to understand the structural heterogeneity and make attempt to propose a structure model for fluor oaluminosilicate glass. The simulation results reveal immiscible behaviors of the fluoroaluminosilicate glass that separate into fluoride-rich phase and aluminosilicate-rich residual matrix, which have structural features ana logous to fluoride and aluminosilicate glass, respectively. Besides, Al3+ plays an essential role to inter-connect oxygen and fluorine ions on the oxide-fluoride phase interface, maintaining the stability of the glass system.
2019年6月 香港城市大学王锋副教授来访，作关于“Exploring Lanthanide Luminescence in Nano\/Microstructured Materials”的邀请报告。
2019年5月 祝贺课题组赵君婕同学关于SiO2-Al2O3-Rf3-NaF玻璃的论文被The journal of physical chemistry接受。Junjie Zhao， Xiuxia Xu, Pengcheng Li, Xinyue Li, Daqin Chen， Xvsheng Qiao,Jincheng Du, Guodong Qian, and Xianping Fan (2019). " Structural Origins of Rf3\/NaRF4 Nanocrystal Precipitation from Phase-Separated SiO2-Al2O3-Rf3-NaF Glasses: A Molecular Dynamics Simulation Study." The journal of physical chemistry 2019, 123, 3024-3032.
Oxyfluoride glass-ceramics with RF3 or NaRF4 (R3+: rare earth elements) nanocrystals are considered as favorable hosts for luminescence applications. In this work, we utilized large-scale molecular dynamics (MD) simulations with effective partial charge potentials to study a series of oxyfluoride glasses that are of interest to the precipitation of RF3 or NaRF4 nanocrystals as previous experiment results suggested. The results show that phase separation exists in all glass compositions with fluoride-rich regions made up of R3+, Na+, and F− and oxide-rich regions consisting of aluminosilicate networks. These fluoride-enriched regions can serve as the precursor for RF3, cubic and hexagonal NaRF4, and NaF crystal precipitation. The results also confirm that the concentration of Na+ in the fluoride phase plays a key role in determining the crystal phases (RF3,NaRF4, or NaF) and crystal structure (cubic vs hexagonal NaRF4) to be precipitated. Consequently, this study shows that MD simulations with effective potentials can fill the gap in the structural understanding of oxyfluoride glass and provide insights into atomic scale information of the phase separation behavior that is useful in predicting the potential crystal types in oxyfluoride glass. When coupled with experimental validations, these simulations can expedite the exploration of novel luminescent oxyfluoride glass ceramics
2019年4月 祝贺课题组徐秀瑕同学关于银离子掺杂玻璃的论文被ACS Applied Nano Materials接受。Xiuxia Xu,Junjie Zhao, Xue Luo, Ronghua Ma, Jiangyun Qian, Xvsheng Qiao, Jincheng Du,Guodong Qian, Xianghua Zhang, and Xianping Fan (2019). " Stabilization of Fluorescent [Agm]N+ Quantum Clusters in Multiphase Inorganic Glass-Ceramics for White Leds." ACS Applied Nano Materials 2019, 2, 2854-2863.
Silver quantum clusters ([Agm]n+ QCs) are a type of efficient broadband fluorescence centers with m and n related quantum size effects but usually lack chemical and thermal stability. To solve such a problem and exploit [Agm]n+ QCs potential applications in white LED lighting, [Agm]n+ QCs and rare earth ions (RE3+) were designed to be selectively enriched into B2O3-rich spinodal nanophase separation and SrF2 nanocrystals in fluoroborosilicate multiphase glass-ceramics. In this work, Ag\/RE3+-codoped glasses and glass-ceramics with a designed composition were prepared through a melt-quenching method and subsequent heat treatment. The B2O3-rich spinodal nanophase separation and SrF2 nanocrystals were stepwise formed in these glass-ceramics. Taking Ag\/Er3+-codoped glass-ceramics for an example, the special microstructures were clearly revealed by transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), scanning transmission electron microscopy (STEM), and energy-dispersive X-ray spectroscopy (EDX) mappings. By the strategies of controlling [Ag+] solubility and charge compensating to [AlO4]−, [BO4]−, and [ZnO4]2− tetrahedra, a large quantity of [Agm]n+ QCs were stabilized in the glass networks with regulated m and n. By the strategies of RE3+\/Al3+ and Ag+\/Na+ competitive distribution, the solubility of Ag+ in B2O3-rich glassy phases was effectively increased, and [Agm]n+ QCs were eventually stabilized to withstand the postcrystallization procedures at high temperatures up to 650 °C. By the multiphase strategy, Ag and RE3+ were selectively partitioned into the B2O3-rich nanosize glassy phases and SrF2 nanocrystals, respectively. Thus, energy transfers (ETs) between [Agm]n+ and RE3+ can be well-suppressed to enhance the photoluminescence quantum yields (PL QYs) of the multiphase glass-ceramics. Those engaged [Agm]n+ with largely improved white light-emitting diode (WLED) performances, e.g., QY and color rendering index (CRI), in the glass-ceramics. This suggests that Ag\/RE3+-codoped glass ceramics can be ideal candidate phosphors for high-power WLED lighting devices
2019年3月 福建师范大学教授陈大钦来访，作关于“无机氧化物玻璃相选择析晶研究”的学术报告。
2018年11月 受邀参加华东四校材料青年****2018论坛(浙江，绍兴)
2018年11月 华中科技大学翟天佑教授来访（****，****），作关于“金属硫属二维材料的气相控制合成与光电探测性能”的邀请报告。
2018年11月 湖南大学潘安练教授来访（****），作关于“低维半导体结构能带调控及光子特性研究”的邀请报告。
2018年11月 受邀参加中国功能玻璃学术研讨会暨新型光电子材料国际论坛(云南，昆明),作题为“无机玻璃稳定的银量子团簇构型调控与光谱学性能研究”的邀请报告。
2018年10月参加第九届亚洲纳米科学和纳米技术会议(AsiaNANO 2018) (中国，青岛)，承担第六分会场组委会工作(session-6-Info-nano science & technologies，分会主席 钱国栋教授）。
2018年9月 祝贺课题组陈烁同学关于(SnxSb1-x)2Se3光电探测应用基础研究的论文被JMCC接受。Chen, S., K. Shehzad, X. Qiao, X. Luo, X. Liu, Y. Zhang, X. Zhang, Y. Xu and X. Fan (2018). "A high performance broadband photodetector based on (SnxSb1−x)2Se3 nanorods with enhanced electrical conductivity." Journal of Materials Chemistry C.
The Sb2Se3 is highly interesting narrow band gap semiconductor with promising applications in new-generation electronic and photoelectronic devices. However, it has intrinsically low electrical conductivity which limits its broader scope of applications. To overcome this challenge, the Sn-doped Sb2Se3 ((SnxSb1-x)2Se3) nanorods with enhanced electrical conductivity are firstly synthesized via a facile hot-injection method. With increasing doping concentration of Sn4+, the (SnxSb1-x)2Se3 nanorods exhibit several orders of magnitude improvement in electrical conductivity which originates from increase of carrier concentration. The photodetector based on the (SnxSb1-x)2Se3 nanorod film shows a higher responsivity (6.21 A\/W) and external quantum efficiency (906%), lower noise equivalent power (3.14×10-13 W\/Hz1\/2), and fast response time (0.04 s), surpassing the performance of the Sb2Se3 nonorod film photodetector. In addition, the (SnxSb1-x)2Se3 nanorod film photodetector also displays a broadband spectral response ranging from UV to IR. Those excellent performances unambiguously demonstrate that the (SnxSb1-x)2Se3 nanorods are promising for the utilizations as highly efficient broadband photodetectors.
2018年8月 祝贺课题组陈晓桐同学关于银量子团簇掺杂发光玻璃的论文被PCCP接受。Chen, X., et al. (2018). "Phase separation strategies to facilely form fluorescent [Ag2]2+\/ [Agm]n+ quantum clusters in boro-alumino-silicate multi-phase glasses." Physical Chemistry Chemical Physics. DOI:10.1039\/C8CP04536D
By adjusting the content of ZnF2-SrF2\/ZnO-SrO, a series of SiO2-Al2O3-B2O3-Na2O-ZnO\/ZnF2-SrO\/SrF2-Ag multi-phase glasses were designed and prepared via melt-quenching method. Under a phase separation strategy, negatively charged tetrahedrons ([BO4]-, [ZnO4]2-, and [AlO4]-) can be generated to stabilize different silver species (Ag+ ions; [Ag2]2+ pairs; [Agm]n+ quantum clusters (Ag QCs)) in B2O3-rich and ZnO-Al2O3 rich sub-phases. B2O3-rich sub-phase has high solubility of Ag+ ions and [Agm]n+ QCs. Fluoride-rich phase shows good ability to extract Na+ from B2O3-rich sub-phase, significantly affect the solubility of Ag+ in B2O3-rich sub-phase, and eventually determine the aggregation from Ag+ ions and Ag0 atom to [Agm]n+ QCs. ZnO- Al2O3-rich or ZnO-SiO2-rich (i.e. SiO2-rich in GZnOSrO) phase has relatively high solubility of [Ag2]2+ pairs. The Ag+\/ [Ag2]2+\/ [Agm]n+ QCs fluorescent centers were identified with spectroscopic analysis, where the fluorescence bands are located in ultraviolet, green-white and orange spectral region, respectively. The fluorescent quantum yield (QY) of [Agm]n+ QCs can be well improved to 55.7%, and the combination of these three luminescent centers can achieve white light emission.
2018年8月 香港城市大学王锋副教授来访，作关于“Combatting concentration quenching in lanthanide-doped upconversion nanoparticles”的邀请报告，完成教育部“香港与内地高等学校师生交流计划”项目，来访人员还包括香港城市大学王锋副教授课题组的两位博士生。
2018年7月 访问德国Kiel大学Lorenz Kienle教授课题组和Leibniz表面工程研究所Andriy Lotnyk博士课题组，作关于“Chalcogenide Photodector Materials: Preparation, Properties and Applications”的学术报告。
2018年7月 受邀参加15th International Conference on the Physics of Non-CrystallineSolids & 14th European Society of Glass Conference (PNCS-ESG 2018)国际会议(法国 St. Malo),作题为 Phase separation and crystallization strategies to enhance the PL of Ag\/Re doped multi-phase glass and glass-ceramics的国际会议邀请报告。
2018年5月 作为分会秘书长组织浙江大学材料科学与工程学院-第三届先进材料微结构与性能国际研讨会暨40周年院庆材料创新论坛-光子功能材料分论坛。
2018年5月 参加美国陶瓷学会2018 Glass and Optical Materials Division (GOMD) Meeting (美国San Antonio)，作题为“Several strategies to stabilize [Agm]n+ quantum cluster in borofluorosilicate glass”的学术报告。
2018年2月 祝贺课题组万军同学关于SrAl2O4：Eu2+纳米荧光粉的论文被JMCC接受。Wan, J., et al. (2018). "Facile synthesis of monodisperse SrAl2O4:Eu2+ cage-like microspheres with excellent luminescence quantum yield." Journal of Materials Chemistry C. DOI: 10.1039\/C7TC05203K
Commercial LED phosphors are usually prepared by a conventional solid-state reaction method and subsequent ball milling process, which often result in non-uniform size distributions, irregular shape and impurity contamination of the phosphors. In this work, the SrAl2O4:Eu2+ cage-like microspheres with uniform size distribution and excellent photoluminescence (PL) quantum yield (QY) are prepared by an epoxide-driven sol-gel route and subsequent heat treatment in reducing atmosphere. This unique cage-like microstructure not only makes better use of excited light but also significantly increase PL quenching concentration of the Eu2+ ions. The optimum internal QY of the SrAl2O4:Eu2+ cage-like microspheres is measured to be up to 94.94%, much higher than the highest internal QY (55%) of the SrAl2O4:Eu2+ phosphors reported so far. The approach may be readily applied to prepare other lanthanide ions doped cage-like microspheres, implying a new route for preparing highly efficient PL phosphors with regular shape and uniform particle size.
2017年12月 访问华东理工大学曾惠丹教授课题组，作题为“利用分相与晶化调控局域掺杂格位及光子功能玻璃陶瓷应用前景探讨”的邀请报告。
2017年12月 参加第九届全国稀土发光材料学术(广州)研讨会暨国际论坛，作题为“球形单分散形貌铝酸盐荧光粉”的邀请报告。
2017年11月 受邀访问杭州电子科技大学陈大钦课题组，作题为“Luminescent Glass-ceramics Containing Fluoride, Aluminate and Borate Subphases for WLED Application”的邀请报告。
2017年10月 祝贺课题组王长建同学关于稀土发光温度传感论文被RSC Advances接受。Wang, C., et al. (2017). "Dual mode temperature sensing through luminescence lifetimes of F- and O-coordinated Cr3+ sites in fluorosilicate glass-ceramics." RSC Advances 7(83): 52435-52441. DOI: 10.1039\/c7ra10864h
Luminescence lifetime based temperature sensing has an intrinsic immunity to the influence of external conditions, and dual mode thermometry is highly accurate due to its "self-calibration" merit. To develop thermometry with both features, we investigated the phase and microstructural evolution of Cr3+-doped calcium-fluorosilicate glass and glass-ceramics, which revealed different luminescent behavior relating to the different Cr3+ sites in the materials. From the photoluminescence (PL) spectra, the emission at 717 nm was derived from the O-coordinated octahedral sites, while the 1 [small mu ]m super-broad emission was assigned to the F-coordinated octahedral sites. After an annealing treatment, cubic CaF2 nanocrystals were homogeneously precipitated in the glass-ceramics; thus, both the O-coordination in the residual glass phase and F-coordination in the CaF2 crystalline phase were strengthened. This led to the enhancement of both the emissions at 717 nm and 1 [small mu ]m. The O-coordinated sites were relatively strong-field sites in which the fluorescence of Cr3+ originated from the radiative transitions of the two thermally coupled energy levels, 2E and 4T2, while the F-coordinated sites were relatively weak-field sites. Hence, the Cr3+ exhibits only one excited state 4T2, which is inactivated by radiative transitions and non-radiative transitions from the thermal quench. Based on the obtained results, the maximum relative temperature sensitivity coefficients are 0.76% K-1 at 498 K for the 717 nm emission and 0.47% K-1 at 351 K for the 1 [small mu ]m emission. This provides the possibility of developing a dual mode temperature sensor with high precision only using a single material.
2017年10月 参加第三届中国稀土发光(重庆)青年论坛，作题为“Multi-phase Oxyfluoride Glass and Glass-cermics: Phase separation induced crystallization, Selective Enrichment and QY enhancement”的邀请报告。
2017年10月 受邀参加2017年稳态-瞬态光谱最新技术和应用(杭州)研讨会，作题为“发光材料的结构调控、光谱学性能优化与发光机理研究”的邀请报告。
2017年8月 祝贺课题组张雨婷同学关于球形纳米YAG荧光粉的论文被JMCC接受。Zhang, Y., et al. (2017). "Facile synthesis of monodisperse YAG:Ce3+ microspheres with high quantum yield via an epoxide-driven sol-gel route." Journal of Materials Chemistry C 35: 8952-8957. DOI: 10.1039\/c7tc02909h
Spherical cerium-doped yttrium aluminum garnet (YAG:Ce3+) phosphor particles can achieve both higher packing densities and lower scattering of light, and thus make it possible to obtain excellent white-light-emitting diode performance. In this study, monodisperse YAG:Ce3+ microspheres have been synthesized through a fast epoxide-driven sol-gel route and subsequent heat treatment under a reducing atmosphere. The spherical morphology was mainly influenced by the phase separation and gelation process, which could be controlled by the ratio of water\/ethanol. Pluronic F127 was introduced into the sol-gel system to control the size of the YAG:Ce3+ microspheres, which significantly increased the luminescence intensity of the YAG:Ce3+ microspheres. The luminescence quantum yield of the 6 mol% Ce3+ ion doped YAG microspheres was measured to be more than 90%, which was as high as that of commercial YAG:Ce3+ phosphors. This approach may be readily applied to prepare a broad range of rare earth doped microspheres, implying a new route for the preparation of LEDs phosphors with regular shape and high quantum yield.
2017年8月 访问法国蒙彼利埃Charles Gerhardt (UMR CNRS 5253) 研究所的Michel WONG CHI MAN (Head of Nanostructured silica-based materials team)研究员课题组。
2017年8月 访问法国蒙彼利埃Charles Gerhardt (UMR CNRS 5253) 研究所的Michel WONG CHI MAN (Head of Nanostructured silica-based materials team)研究员课题组。
2017年7月 主办“光电功能材料与器件-青年****(杭州)国际论坛”，作题为“多相发光玻璃陶瓷结构优化、离子选择性富集与价态调控”的学术报告。
2017年6月 祝贺课题组马荣华博士生论文被Phys. Chem. Chem. Phys.接受。Ronghua Ma, Junjie Zhao, Xiaotong Chen, Xvsheng Qiao, Xianping Fan, Jincheng Du and Xianghua Zhang, “Stabilization of ultra-small [Ag2]2+ and [Agm]n+ nano-clusters through negatively charged tetrahedrons in oxyfluoride glass networks: To largely enhance the luminescence quantum yields”, Physical Chemistry Chemical Physics, 2017, DOI: 10.1039\/C7CP02531A
2017年6月 访问昆明理工大学邱建备教授课题组，作题为“多相发光玻璃陶瓷结构优化、离子选择性富集与价态调控”的邀请报告。
2017年5月 美国西北太平洋国家实验室首席材料科学家、华盛顿大学教授Jim De Yoreo 来访，作题为“Investigating crystal nucleation and transformation using liquid cell TEM and AFM”的邀请报告。
2017年5月 德国Kiel University的Kienle教授来访，作题为“Nanoscale Analysis of Advanced Engineering Materials”的邀请报告；德国Leibniz Institute of Surface Modification 的Lotnyk博士来访，作题为“LOCAL STRUCTURE INVESTIGATIONS OF PHASE-CHANGE ALLOYS”的邀请报告。
2017年5月 参加第九届“中国功能玻璃学术研讨会暨新型光电子材料国际论坛”，作题为“氟硅酸盐发光玻璃陶瓷的分子动力学模拟与组成设计”的邀请报告。
2017年5月 参加中国稀土学会2017学术年会，作题为“基于离子选择性富集行为调控银\/稀土共掺发光玻璃陶瓷的能量传递过程与量子效率”的邀请报告。
2017年4月 吉林大学张宇教授来访，作题为“Inorganic Perovskite Quantum Dots for Efficient Solid State Lighting and Display”的邀请报告。吉林大学白雪副教授来访，作题为“Efficient photoluminescent metal oxide hybrid nanophosphors for single-phase white LEDs”的邀请报告。
2017年4月 访问哈尔滨工业大学周欣副教授课题组和黑龙江大学潘清江教授课题组，作题为“氟硅酸盐发光玻璃陶瓷分子动力学模拟、结构调控与光谱学性能研究”的邀请报告。讨论关于“DFT模拟贵金属纳米团簇光谱学性能”的研究课题
2017年3月 访问浙江师范大学郭海教授课题组，作题为“纳米多孔二氧化硅光学功能薄膜的溶胶-凝胶法制备与性能研究”的邀请报告。
2017年3月 祝贺课题组肖尧同学和王媛同学顺利通过硕士论文答辩，获得科学硕士学位。肖尧硕士论文题目：“纳米多孔二氧化硅光学功能薄膜的溶胶-凝胶法制备与性能研究”；王媛硕士论文题目：“氮化铝微球的制备及其在高导热复合材料中的应用”。
2017年3月 祝贺课题组万军同学和吴一民同学顺利通过博士论文答辩，获得工学博士学位。万军博士论文题目：“应用于白光LED的铝基发光材料的制备与发光性能研究”；吴一民博士论文题目：“硒化物半导体材料制备及其光电与热电性能研究”。
2017年2月 祝贺课题组陈烁博士生论文被Small接受。"Facile synthesis of γ-In2Se3 nanoflowers towards high performance self-powered broadband γ-In2Se3\/Si heterojunction photodiode" (Full Paper, No. smll.R1).
2017年1月 北京，作为理事参加中国硅酸盐学会电子玻璃分会十届一次理事会暨技术研讨会，作题为“三维光子带隙结构调控稀土离子上转换发光性质及机理研究”的邀请报告。
2016年12月 昆明理工大学邱建备教授和杨正文教授来访，分别作关于稀土光电功能材料和题为“三维光子带隙结构调控稀土离子上转换发光性质及机理研究”的学术报告。
2016年11月 课题组博士生陈冰J. Phys. Chem. Lett.上发表论文！Chen B, Liu Y, Xiao Y, Chen X, Li Y, Li M, Qiao X, Fan X, Wang F. Amplifying Excitation-Power Sensitivity of Photon Upconversion in a NaYbF4:Ho Nanostructure for Direct Visualization of Electromagnetic Hotspots[J]. J Phys Chem Lett, 2016 (23): 4916-4921.
2016年11月 课题组硕士生肖尧在RSC Advances上发表论文！Xiao Y, Ma R, Wang C, Chen X, Qiao X, Fan X. High performance hierarchical nanoporous antireflective films by a facile sol-gel process[J]. RSC Advances, 2016 (115): 113911-113918.
2016年11月 中山大学王静教授来访，作题为“半导体照明与显示用稀土发光材料”学术报告。
2016年10月 长沙，参加2016中国溶胶－凝胶学术研讨会暨国际论坛会议，作题为“High performance hierarchical nano-porous antireflective films by sol-gel processes”学术报告。硕士生张雨婷作“Facile Synthesis of Monodisperse AlN Microspheres and enhanced red luminescence via Mn2+ doping”学术报告。
2016年9月 国家自然科学基金面上项目被批准。项目批准号：**，项目名称：基于微分相调控晶化与选择性富集增强发光的LED照明用多相白光玻璃陶瓷研究 ，项目起止年月：2017年01月至 2020年 12月。
2016年8月 俄罗斯Nizhny Novgorod，参加2016国际“非氧化物与新型光学玻璃(ISNOG)”会议，作题为“Luminescent Glass-ceramics Containing Fluoride, Aluminate and Borate Subphases for WLED Application”学术报告。
2016年8月 祝贺课题组硕士生王媛在RSC Advances上发表论文！Wang Y, Qiao X, Wan J, Xiao Y, Fan X. Preparation of AlN microspheres\/UHMWPE composites for insulating thermal conductors[J]. RSC Advances, 2016 (83): 80262-80267.
2016年6月-7月 受教育部香港与内地高校师生交流计划2016第一批项目资助，香港城市大学博士生杨雪清、孙天瀛、杜阳阳来访，开展“用于减反射膜的高效稀土光谱转换纳米空心球研究”。
2016年6月 苏州大学孙洪涛教授来访，作题为“铋离子激活新型发光材料的研究”学术报告。
2016年6月 祝贺课题组许倩本科生以小组第一名的成绩顺利通过毕业答辩，获得学士学位！毕业论文题目：氟硅酸盐玻璃体系的分子动力学模拟计算。
2016年6月 香港城市大学王锋博士来访，作题为“Rational photon upconversion in core-shell nanoparticles”的学术报告。
2016年6月 祝贺课题组赵君婕、陈烁和程文煜分别获得CSC资助，赴美国、法国雷恩和法国巴黎进行联合培养博士生计划！
2016年5月 宁波，访问宁波大学戴世勋老师课题组。
2016年4月 北京，中硅会电子玻璃分会十届一次理事会暨技术研讨会，被选为常务理事。
2016年4月 上海，第24届国际玻璃大会(ICG2016)。作题为“Molecular Dynamics Simulation on SiO2-Al2O3\/AlF3-BaO\/BaF2-Na2O\/NaF Glass Systems”的会议报告。博士生马荣华作题为“Tunable luminescence of Ag+-doped oxyfluoride glasses”的poster。
2016年3月 祝贺课题组本科生许倩同时拿到斯坦福、伯克利和MIT的offer！
2016年3月 欢迎浙江大学陈晓桐、罗雪、沈斌华三位本科生即将加入课题组攻读硕士学位！
2016年3月 祝贺高骏同学硕士毕业！毕业论文题目：铜掺杂磷硅酸盐玻璃的制备与光谱学性能研究。
2016年3月 课题组博士生吴一民在Journal of Solid State Chemistry上发表论文！Wu Y, Korolkov I, Qiao X, Zhang X, Wan J, Fan X. Facile synthesis of CuSe nanoparticles and high-quality single-crystal two-dimensional hexagonal nanoplatelets with tunable near-infrared optical absorption[J]. Journal of Solid State Chemistry, 2016: 279-283.
2016年3月 合作通讯作者论文发表！Sun T, Ma R, Qiao X, Fan X, Wang F. Shielding Upconversion by Surface Coating: A Study of the Emission Enhancement Factor[J]. ChemPhysChem, 2016 (5): 766-770.
2016年2月 Chen S, Qiao X, Wang F, Luo Q, Zhang X, Wan X, Xu Y, Fan X*. Facile synthesis of hybrid nanorods with the Sb2Se3\/AgSbSe2 heterojunction structure for high performance photodetectors[J]. Nanoscale, 2016 (4): 2277-83.
2016年1月 Ma R, Gao J, Xu Q, Cui S, Qiao X*, Du J, Fan X. Eu2+ promoted formation of molecule-like Ag and enhanced white luminescence of Ag\/Eu-codoped oxyfluoride glasses[J]. Journal of Non-Crystalline Solids, 2016: 348-353.
template_id
1
photo
\/attachments\/38\/-.jpg
research_field
status
1
opendate
2013-03-11 13:01:08
access_type
access_count
34672
score
connect
selfintroduction
乔旭升，男，1980年出生，工学博士，浙江大学材料系副教授，博导，"求是"青年****，浙江省“纳米材料与器件”重点创新团队成员。2007年于浙江大学博士毕业后留校任教，已经指导或协助指导博士生12名、硕士生14名、本科生20多名。主要从事发光功能材料方面的教学与科研工作。作为项目负责人先后承担或参与了多项国家自然科学基金面上项目、军工项目、国际合作项目和省科技计划项目。已在Appl. Phys. Lett., J. Phys. Chem. C, Phys. Chem. Chem. Phys., Scripta Mater.和J. Amer. Ceram. Soc.等国际期刊已发表SCI收录论文60多篇，SCI论文他人引用800多次。曾于2008年、2010年、2013年分别赴法国 Rennes I大学玻璃与陶瓷实验室、德国Kiel大学材料科学与工程学系和美国北得克萨斯大学从事有关玻璃与玻璃陶瓷光电性能、微结构和材料计算的合作研究。
\r
\r
\r
\r联系方式：qiaoxus@zju.edu.cn
\r
\r
\r
\r
\r研究领域
\r1.发光功能材料:
\r(1)无机玻璃与玻璃陶瓷；
\r(2)纳米发光材料；
\r(3)光功能薄膜。
\r
\r2.材料合成与制备：
\r(1)无机玻璃中微纳结构设计与原位生长；
\r(2)纳米材料的湿化学合成方法；
\r(3)溶胶-凝胶方法。
\r
\r3.材料计算：
\r(1)分子动力学模拟；
\r(2)光谱模拟；
\r(3)发光动力学计算。
\r
\r最新动态 Last updated on July 4, 2017
\r2017年6月 祝贺课题组马荣华博士生论文被Phys. Chem. Chem. Phys.接受。Ronghua Ma, Junjie Zhao, Xiaotong Chen, Xvsheng Qiao, Xianping Fan, Jincheng Du and Xianghua Zhang, “Stabilization of ultra-small [Ag2]2+ and [Agm]n+ nano-clusters through negatively charged tetrahedrons in oxyfluoride glass networks: To largely enhance the luminescence quantum yields”, Physical Chemistry Chemical Physics, 2017, DOI: 10.1039\/C7CP02531A
\r
\r2017年6月 访问昆明理工大学邱建备教授课题组，作题为“多相发光玻璃陶瓷结构优化、离子选择性富集与价态调控”的邀请报告。
\r
\r2017年5月 美国西北太平洋国家实验室首席材料科学家、华盛顿大学教授Jim De Yoreo 来访，作题为“Investigating crystal nucleation and transformation using liquid cell TEM and AFM”的邀请报告。
\r
\r2017年5月 德国Kiel University的Kienle教授来访，作题为“Nanoscale Analysis of Advanced Engineering Materials”的邀请报告；德国Leibniz Institute of Surface Modification 的Lotnyk博士来访，作题为“LOCAL STRUCTURE INVESTIGATIONS OF PHASE-CHANGE ALLOYS”的邀请报告。
\r
\r2017年5月 参加第九届“中国功能玻璃学术研讨会暨新型光电子材料国际论坛”，作题为“氟硅酸盐发光玻璃陶瓷的分子动力学模拟与组成设计”的邀请报告。
\r
\r2017年5月 参加中国稀土学会2017学术年会，作题为“基于离子选择性富集行为调控银\/稀土共掺发光玻璃陶瓷的能量传递过程与量子效率”的邀请报告。
\r
\r2017年4月 吉林大学张宇教授来访，作题为“Inorganic Perovskite Quantum Dots for Efficient Solid State Lighting and Display”的邀请报告。吉林大学白雪副教授来访，作题为“Efficient photoluminescent metal oxide hybrid nanophosphors for single-phase white LEDs”的邀请报告。
\r
\r2017年4月 访问哈尔滨工业大学周欣副教授课题组和黑龙江大学潘清江教授课题组，作题为“氟硅酸盐发光玻璃陶瓷分子动力学模拟、结构调控与光谱学性能研究”的邀请报告。讨论关于“DFT模拟贵金属纳米团簇光谱学性能”的研究课题
\r
\r2017年3月 访问浙江师范大学郭海教授课题组，作题为“纳米多孔二氧化硅光学功能薄膜的溶胶-凝胶法制备与性能研究”的邀请报告。
\r
\r2017年3月 祝贺课题组肖尧同学和王媛同学顺利通过硕士论文答辩，获得科学硕士学位。肖尧硕士论文题目：“纳米多孔二氧化硅光学功能薄膜的溶胶-凝胶法制备与性能研究”；王媛硕士论文题目：“氮化铝微球的制备及其在高导热复合材料中的应用”。
\r
\r
\r
\r2017年3月 祝贺课题组万军同学和吴一民同学顺利通过博士论文答辩，获得工学博士学位。万军博士论文题目：“应用于白光LED的铝基发光材料的制备与发光性能研究”；吴一民博士论文题目：“硒化物半导体材料制备及其光电与热电性能研究”。
\r
\r
\r2017年2月 祝贺课题组陈烁博士生论文被Small接受。"Facile synthesis of γ-In2Se3 nanoflowers towards high performance self-powered broadband γ-In2Se3\/Si heterojunction photodiode" (Full Paper, No. smll.R1).
\r
\r2017年1月 北京，作为理事参加中国硅酸盐学会电子玻璃分会十届一次理事会暨技术研讨会，作题为“三维光子带隙结构调控稀土离子上转换发光性质及机理研究”的邀请报告。
\r
\r2016年12月 昆明理工大学邱建备教授和杨正文教授来访，分别作关于稀土光电功能材料和题为“三维光子带隙结构调控稀土离子上转换发光性质及机理研究”的学术报告。
\r
\r2016年11月 课题组博士生陈冰J. Phys. Chem. Lett.上发表论文！Chen B, Liu Y, Xiao Y, Chen X, Li Y, Li M, Qiao X, Fan X, Wang F. Amplifying Excitation-Power Sensitivity of Photon Upconversion in a NaYbF4:Ho Nanostructure for Direct Visualization of Electromagnetic Hotspots[J]. J Phys Chem Lett, 2016 (23): 4916-4921.
\r
\r2016年11月 课题组硕士生肖尧在RSC Advances上发表论文！Xiao Y, Ma R, Wang C, Chen X, Qiao X, Fan X. High performance hierarchical nanoporous antireflective films by a facile sol-gel process[J]. RSC Advances, 2016 (115): 113911-113918.
\r
\r2016年11月 中山大学王静教授来访，作题为“半导体照明与显示用稀土发光材料”学术报告。
\r
\r2016年10月 长沙，参加2016中国溶胶－凝胶学术研讨会暨国际论坛会议，作题为“High performance hierarchical nano-porous antireflective films by sol-gel processes”学术报告。硕士生张雨婷作“Facile Synthesis of Monodisperse AlN Microspheres and enhanced red luminescence via Mn2+ doping”学术报告。
\r
\r2016年9月 国家自然科学基金面上项目被批准。项目批准号：**，项目名称：基于微分相调控晶化与选择性富集增强发光的LED照明用多相白光玻璃陶瓷研究 ，项目起止年月：2017年01月至 2020年 12月。
\r
\r2016年8月 俄罗斯Nizhny Novgorod，参加2016国际“非氧化物与新型光学玻璃(ISNOG)”会议，作题为“Luminescent Glass-ceramics Containing Fluoride, Aluminate and Borate Subphases for WLED Application”学术报告。
\r
\r2016年8月 祝贺课题组硕士生王媛在RSC Advances上发表论文！Wang Y, Qiao X, Wan J, Xiao Y, Fan X. Preparation of AlN microspheres\/UHMWPE composites for insulating thermal conductors[J]. RSC Advances, 2016 (83): 80262-80267.
\r
\r2016年6月-7月 受教育部香港与内地高校师生交流计划2016第一批项目资助，香港城市大学博士生杨雪清、孙天瀛、杜阳阳来访，开展“用于减反射膜的高效稀土光谱转换纳米空心球研究”。
\r
\r2016年6月 苏州大学孙洪涛教授来访，作题为“铋离子激活新型发光材料的研究”学术报告。
\r
\r2016年6月 祝贺课题组许倩本科生以小组第一名的成绩顺利通过毕业答辩，获得学士学位！毕业论文题目：氟硅酸盐玻璃体系的分子动力学模拟计算。
\r
\r2016年6月 香港城市大学王锋博士来访，作题为“Rational photon upconversion in core-shell nanoparticles”的学术报告。
\r
\r2016年6月 祝贺课题组赵君婕、陈烁和程文煜分别获得CSC资助，赴美国、法国雷恩和法国巴黎进行联合培养博士生计划！
\r
\r2016年5月 宁波，访问宁波大学戴世勋老师课题组。
\r
\r2016年4月 北京，中硅会电子玻璃分会十届一次理事会暨技术研讨会，被选为常务理事。
\r
\r2016年4月 上海，第24届国际玻璃大会(ICG2016)。作题为“Molecular Dynamics Simulation on SiO2-Al2O3\/AlF3-BaO\/BaF2-Na2O\/NaF Glass Systems”的会议报告。博士生马荣华作题为“Tunable luminescence of Ag+-doped oxyfluoride glasses”的poster。
\r
\r2016年3月 祝贺课题组本科生许倩同时拿到斯坦福、伯克利和MIT的offer！
\r
\r2016年3月 欢迎浙江大学陈晓桐、罗雪、沈斌华三位本科生即将加入课题组攻读硕士学位！
\r
\r2016年3月 祝贺高骏同学硕士毕业！毕业论文题目：铜掺杂磷硅酸盐玻璃的制备与光谱学性能研究。
\r
\r2016年3月 课题组博士生吴一民在Journal of Solid State Chemistry上发表论文！Wu Y, Korolkov I, Qiao X, Zhang X, Wan J, Fan X. Facile synthesis of CuSe nanoparticles and high-quality single-crystal two-dimensional hexagonal nanoplatelets with tunable near-infrared optical absorption[J]. Journal of Solid State Chemistry, 2016: 279-283.
\r
\r2016年3月 合作通讯作者论文发表！Sun T, Ma R, Qiao X, Fan X, Wang F. Shielding Upconversion by Surface Coating: A Study of the Emission Enhancement Factor[J]. ChemPhysChem, 2016 (5): 766-770.
\r
\r
\r2016年2月 Chen S, Qiao X, Wang F, Luo Q, Zhang X, Wan X, Xu Y, Fan X*. Facile synthesis of hybrid nanorods with the Sb2Se3\/AgSbSe2 heterojunction structure for high performance photodetectors[J]. Nanoscale, 2016 (4): 2277-83.
\r
\r2016年1月 Ma R, Gao J, Xu Q, Cui S, Qiao X*, Du J, Fan X. Eu2+ promoted formation of molecule-like Ag and enhanced white luminescence of Ag\/Eu-codoped oxyfluoride glasses[J]. Journal of Non-Crystalline Solids, 2016: 348-353.
\r
\r
url
telephone
qiaoxus@zju.edu.cn
address
玉泉校区曹光彪大楼
research
mypage_id
5054
work_title
learn_degree
work_post
research_orientation
handle
qxs
main_status
1
access_uid_status
1
theme_id
qrcode_status
1
gmt_qrcode
2021-01-25 07:17:48
content
乔旭升，男，1980年出生，2007年于浙江大学获工学博士，毕业后留校任教。浙江大学材料学院副教授，博导，'求是'青年****，杭州市硅酸盐学会秘书长，中国稀土学会光电材料与器件专委会理事兼副秘书长、中国硅酸盐学会特种玻璃分会理事、中国硅酸盐学会电子玻璃分会理事。主要从事发光功能材料方面的教学与科研工作。作为项目负责人先后承担或参与了10多项国家自然科学基金面上项目、军工项目、国际合作项目和省科技计划项目。已在Angew. Chem. Int. Ed., Appl. Phys. Lett.和 J. Mater. Chem. C等国际期刊已发表SCI收录论文100多篇，SCI论文他人引用1500多次。开设课程：《固态照明材料》和《固体化学》。曾于2008年、2010年、2013年分别赴法国 Rennes I大学玻璃与陶瓷实验室、德国Kiel大学材料科学与工程学系和美国北得克萨斯大学从事有关玻璃与玻璃陶瓷光电性能、微结构和材料计算的合作研究。曾多次受邀在PNCS、ICG等国际会议上做邀请报告。
研究领域
1.光子与光电子功能材料:
(1)无机玻璃、玻璃陶瓷与光子功能器件；
(2)硫系半导体低维材料与光电子器件；
(3)掺杂纳米晶、微米晶荧光材料与器件；
2.材料合成与制备：
(1)玻璃晶化与玻璃分相；
(2)微纳米材料的湿化学合成；
(3)溶胶-凝胶。
3.材料计算：
(1)分子动力学模拟；
(2)第一性原理计算；
(3)发光动力学计算。
最新动态 Last updated on DEC 25, 2020
2020年12月，一种多色银量子团簇掺杂多相荧光玻璃及其制备方法, 专利授权。
2020年9月，祝贺课题组何梦婷同学关于玻璃陶瓷荧光粉的综述被Ceramics International 接受。M. He，J. Jia，J. Zhao，X. Qiao，J. Du，X. Fan, Glass-ceramic phosphors for solid state lighting: A review, Ceramics International , 09(2020):227
Solid state lighting, including phosphor converted light-emitting diodes (LEDs) and laser diodes (LDs), have released high demand to develop thermally stable phosphors. For this purpose, inorganic glass-ceramics (GCs) embedded with phosphor particles can act as competitive candidates. They are superior to traditional phosphors or resin\/silica composites through successfully overcoming thermal aging and color temperature drifting problems and simultaneously maintaining high luminescent efficiencies. Inorganic GC phosphors can be classified into devitrified glass-ceramics, PiG (Phosphor-in-Glass) and sintered glass-ceramics. This review summarized the recent progress on LED\/LD GC phosphors from the aspects of design principles, synthesis methods, microstructure-property relationships and their application studies. In addition, some challenging issues (e.g., crystallization behavior of luminous phase in glass, corrosion behavior of phosphor by glass matrix) are also discussed in detail. Significant issues of glass-ceramics packed LED\/LD, such as luminescence efficiency, chromaticity, correlated color temperature and color gamut, are sorted out as well. Potential research directions are further suggested for not only developing new glass-ceramic phosphors but feeding upon various practical application.
2020年8月，祝贺课题组Abhishek Wadhwa同学关于氟化物玻璃的论文被Journal of Non-Crystalline Solids接受。 A. Wadhwa, P.Awasthi, K. Ren, X. Xu, X. Qiao, X.Fan, G. Qian, Selective enrichment of Ln3+ (Ln = Yb; Er) and Cr3+ into SrF2 and ZnAl2O4 nanocrystals precipitated in fluorosilicate glass-ceramics: A dual mode optical temperature sensing study, Journal of Non-Crystalline Solids, 552(2021): 120395。
The dual mode optical thermometry offers precise temperature sensing with self-calibration merit. To realise this, an oxy-fluoride precursor glass was transformed to a semi-transparent glass-ceramic having simultaneously precipitated SrF2:Yb3+\/Er3+ and ZnAl2O4:Cr3+ phases. Under 980 nm excitation, intense green up-conversion (UC) luminescence of Er3+: 2H11\/2, 4S3\/2 → 4I15\/2 and under 535 nm excitation, enhanced red down-conversion (DC) luminescence lifetime of Cr3+: 2E, 4T2 → 4A2 was realized. Both the UC and DC transitions were highly reliant upon temperature. The fluorescence intensity ratio (FIR) study of erbium's thermally coupled energy states (2H11\/2 and 4S3\/2) produced maximum temperature sensing sensitivity values of 1.11% K?1 at 334 K and 0.66% K?1 at 275 K, respectively. Likewise, temperature dependent luminescence lifetime of Cr3+ attributed to the transitions arising from the parity forbidden (2E → 4A2) and spin allowed (4T2 → 4A2) relaxations produced maximum temperature sensing sensitivity value equal to 0.19% K?1 at 435 K.
2020年8月，祝贺课题组任锴同学关于银量子团簇发光玻璃的论文被Phys. Chem. Chem. Phys 接受。K. Ren , X. Xu, Z. Yao, X. Chen, T. Hu , P.g Li , X. Fan , J. Du, X. Qiao and G. Qian, Temperature dependent molecular fluorescence of [Agm]n+ quantum clusters stabilized by phosphate glass networks,Phys. Chem. Chem. Phys, 22(2020), 21307-21316
Molecule like silver quantum clusters ([Agm]n+ QCs) exhibit an ultrasmall size confinement resulting in efficient broadband fluorescence. However, free [Agm]n+ QCs are also chemically active, so their stabilization is required for practical applications. We report in this work a phosphate oxyfluoride glass network enabled stabilization strategy of [Agm]n+ QCs. A series of silver-doped P2O5–ZnF2–xAg glasses were prepared by a conventional melt-and-quench method. The NMR and XPS results reveal that two types of [P(O,F)4] tetrahedrons (Q1, Q2) form chain structures and Zn(IV) connects [P(O,F)4] chains into a 3-dimension network in the glasses. The frameworks with limited void spaces were designed to restrict the polymerization degree, m, of [Agm]n+ QCs; the negatively charged tetrahedrons were designed to restrict the charge, n, of [Agm]n+ QCs. Through optical and mass spectroscopy studies, silver quantum clusters, [Ag2]2+ and [Ag4]2+, were identified to be charge compensated by [ZnO4] tetrahedrons and surrounded with [P(O,F)4] complex anions. The fluorescence thus gives high quantum efficiencies of 55.2% and 83.4%, for P2O5–ZnF2–xAg glass stabilized [Ag2]2+ and [Ag4]2+ QCs, respectively. This further reveals that the peak fixed fluorescence of [Ag2]2+ and [Ag4]2+ can be described by molecular fluorescence mechanisms. These are parity-allowed singlet–singlet transitions (S1 - S0), parity-forbidden triplet–singlet transitions (T1 - S0) and intersystem crossings between singlets (S1) and triplets (T1). The phonon coupled intersystem crossing between singlets (S1) and triplets (T1) determines the phosphate stabilized [Ag4]2+ QCs to exhibit a series of temperature dependent fluorescence behaviors. These include fluorescence intensity (at 50–200 K), intensity ratio (FIR) (at 50–200 K), peak shift (at 100–300 K) and lifetime (at 300–450 K) with maximum sensitivities of 1.27% K-1, 0.94% K-1, 0.29% K-1 and 0.41% K-1, respectively. Therefore, phosphate stabilized [Ag4]2+ QCs can be applied as temperature sensing probes, especially at low temperatures (10–300 K) and for color-based visualized temperature sensors.
2020年6月，一种硼氧网络稳定的可见波段可调荧光银量子团簇掺杂无机玻璃及其制备方法, 专利授权。
2020年6月，一种利用锌氧四面体电荷平衡的银量子团簇掺杂蓝绿荧光玻璃及其制备方法, 专利授权。
2020年6月，一种基于非桥氧配位的绿白荧光银量子团簇掺杂氟磷酸盐玻璃及其制备方法, 专利授权。
2020年5月，一种铕掺杂微球形荧光粉及其制备方法, 专利授权。
2020年4月，祝贺课题组徐秀瑕同学关于Ca2+\/Sr2+\/Ba2+ 发光玻璃的论文被Journal of the American ceramic society 接受。X. Xu, J. Zhao, X. Chen, Q. Xu, T.Wang, S. Yu, X. Xu, X. Qiao, J. Du, X. Fan, J. Qiu, G. Qian, Ca2+\/Sr2+\/Ba2+ dependent phase separation, nanocrystallization and photoluminescence in fluoroaluminosilicate glass, Journal of the American ceramic society, 103(2020):5796–5807.
Fluoride phase separation is the initial stage of nanocrystallization in oxyfluoride glasses, and it is a key step in achieving transparent glass-ceramics with good luminescence. In this work, we combine molecular dynamics (MD) simulations and experimental studies to investigate the phase separation, nanocrystallization and photoluminescence in fluoroaluminosilicate glass and glass-ceramics containing alkali earth fluoride (MF2). The results reveal different phase separation behaviors due to the field strength difference of M2+. The composition and size similarity between the fluoride-rich regions in the MD simulated glass and the fluoride nanocrystals in the experimental prepared glass-ceramics are observed, suggesting that the separated fluoride phase is the structural origin of the observed MF2 nanocrystals. Besides, in order to understand the M2+ dependent glass structural features, the crystallization temperatures, the luminescent properties of Eu3+ and Eu2+ doped glass-ceramics, and the lasing performance of Er3+ doped glass-ceramics are discussed. Based on these comprehensions, some strategies are proposed to help to efficiently design oxyfluoride glass with desired luminescence performance.
2020年2月 祝贺课题组赵飞宇同学关于GeSe低维材料的论文在CHEMPHYCHEM上发表。Feiyu Zhao,[a] Xue Luo,[a] Lixiang Liu,[b] Jianhang Lv,[b] Xianping Fan,*[a] Xvsheng Qiao,*[a]Yang Xu,*[a, b] Lorenz Kienle,[c] Xianghua Zhang,[d] and Guodong Qian[a]. “Visible-NIR Photodetectors Based on Low-Dimensional GeSe Micro-Crystals: Designed Morphology and Improved Photoresponsivity”. ChemPhysChem 2020, DOI: 10.1002\/cphc.
GeSe micro-sheets and micro-belts have been synthesized by a facile one-pot wet chemical method in 1-octadecene solvent and oleic acid solvent, respectively. The adsorption of more oleic acid molecules on the (002) plane promoted growth along [010] direction of the GeSe micro-belts and limited carrier transport in this direction, resulting in higher carrier concentration and mobility of the GeSe micro-belts. The performance of the photodetectors based on the single GeSe micro-sheet and the single GeSe micro-belt was investigated under illumination at 532 nm, 980 nm and 1319 nm. Both, photodetectors based on a single GeSe micro-sheet and a single GeSe micro-belt, exhibit a high photoresponse, short response\/ recovery times, and long-term durability. Moreover, the photodetector based on a single GeSe micro-belt displays a broadband response with a high responsivity (5562 A\/W at 532 nm, 1546 A\/W at 980 nm) and detectivity (3.01×1012 Jones at 532 nm, 8.38×1011 Jones at 980 nm). These excellent characteristics render single GeSe micro-belts very interesting for use as highly efficient photodetectors, especially in the NIR region.
2019年11月中国计量大学张军杰研究员来访（钱江****），作关于“中红外激光玻璃光纤材料”的邀请报告。
2019年11月 受邀参加FRIMS Symposium国际会议(日本),作题为 Inorganic Glass Stabilized Fluorescent [Agm]n+ Quantum Clusters的国际会议邀请报告。
2019年11月 受邀参加国际功能材料大会(NCFM & MFMS & INM 2019，重庆),作题为 Prediction of Structure and Crystallization of Oxyfluoride Glass via MD Simulation的国际会议邀请报告。
2019年11月 受邀参加International Symposiums for Phosphor Materials (Phosphor Safari 2019)国际会议(厦门),作题为 Spherical phosphor composited glass-ceramics for white LD lighting的国际会议邀请报告。
2019年9月 德国基尔大学Lorenz Kienle教授来访，作关于“Complex nanostructured materials”的学术报告。
2019年9月 祝贺课题组孙薪雯同学关于稀土离子发光应用基础研究的论文被CrystEngComm 接受。Xinwen Sun, Xinwei Wang, Bing Chen, Feiyu Zhao, Xiuxia Xu, Kai Ren, unhao Lu, Xvsheng Qiao, Guodong Qian and Xianping Fan(2019). 'Phase and morphology evolution of luminescent NaLnF4 (Ln = La to Yb) micro-crystals: understanding the ionic radii and surface energy-dependent solution growth mechanism.' CrystEngComm 2019,21, 6652-6658.
Lanthanide (Ln)-based NaLnF4 micro-crystals (MCs) exhibit great advantages and strong feasibility for integration into micron-sized photonic devices. However, there is still a lack of thermodynamic understanding of the solution growth mechanisms of NaLnF4 MCs. Herein, we report the preparation of hexagonal NaLnF4 MCs with various morphologies (rod-, disk- and flake-like) and crystal sizes (100 nm to 10 μm) via a hydrothermal route. The morphologies and sizes of NaLnF4 MCs were revealed to be highly dependent on the ionic radius of different Ln3+ ions. We have proposed a ligand-adsorption-driven oriented growth model and a surface energy dominant nucleation model to interpret the above phenomena. First, the citrate (Cit3−) adsorption on the {101ˉ0} lattice plane primarily leads to different morphologies of NaLnF4 MCs. Second, different surface energies are required for nucleation and are responsible for crystal size evolution from NaYbF4 to LaF3. Third, alternative phase types from NaLnF4 to LnF3 are related to the Ln–F bond energy and Goldschmidt's law of crystal chemistry. In addition, the surface ligand removal is beneficial for the luminescence enhancement of NaLnF4 MCs. These results provide a thermodynamic understanding for researchers to develop NaLnF4 MCs with targeted morphology and size
2019年9月 祝贺课题组赵君婕同学关于BaF2\/Ba1 – XRXF2 + X\/RF3发光玻璃的论文被Advanced Theory and Simulations接受。Junjie Zhao, Xiuxia Xu, Kai Ren, Zhou Luo, Xvsheng Qiao,* Jincheng Du,* Jianbei Qiu, Xianping Fan, and Guodong Qian (2019). ' Structural Origins of Baf2\/Ba1 – XRXF2 + X\/Rf3 Nanocrystals Formation from Phase Separated Fluoroaluminosilicate Glass: A Molecular Dynamic Simulation Study.' Advanced Theory and Simulations 2019, **.
Fluoroaluminosilicate glass-ceramics with M1 − x RxF2 + x (M2+: Sr2+, Ba2+,R3+: rare earth ions) crystals are novel host materials for luminescence applications. However, the preparation of such materials is still a trial-error based approach due to the lack of detailed glass structure understanding. In this work, the authors study the phase separation and potential nanocrystal formation in a series of Ba2+ and La3+ containing fluoroaluminosilicate glasses by molecular dynamics (MD) simulations. Fluoride phase separation is observed from all simulated glass samples. With gradual LaF3 to BaF2 substitution, the cations enrichment changes from Ba2+, to Ba2+ and La3+, and finally La3+ in the fluoride-rich regions. Besides, the competition between Al3+ and La3+ in fluoride phase and the consequently redistribution of Al3+ and Na+ into oxide phase are observed, which can change the local environment of luminescent centers, affecting luminescence. An experimental support to this phenomenon is given. Therefore, MD simulation with effective potentials can be a practical method to study the structural origins of nanocrystal from fluoride phase separation as well as to study the structure-property relationship in fluoroaluminosilicate glass. The simulation driven glass structure and crystal phase exploration can thus become an effective method in designing glass-ceramics for luminescence and other applications.
2019年7月 美国北德克萨斯州大学杜金成教授来访，作关于“Glass genome: a material genome approach in glass science and its application”的学术报告。
2019年6月 受邀参加25th ICG国际会议(美国，波士顿),作题为 Phase Separation and Crystallization Strategies to Construct Multiphase Glass-ceramics to Stabilize Molecular [Agm]n+ Quantum Clusters的国际会议邀请报告。
2019年6月 祝贺课题组赵君婕同学关于发光玻璃计算模型的论文被Journal of the European Ceramic Society接受。Junjie Zhaoa,b, Xiuxia Xua,b, Xiaotong Chen, Qian Xua, Zhou Luo, Xvsheng Qiao, Jincheng Dub, Xianping Fan, Guodong Qian (2019). ' A Structure Model for Phase Separated Fluoroaluminosilicate Glass System by Molecular Dynamic Simulations.' Journal of the European Ceramic Society.2019.06.042.
Oxyfluoride glass and glass ceramics have been widely used in optical devices with Ln3+ doping. Especially,fluoride phase separation is considered as the initial stage of nanocrystallization that can help to realize the controllable crystallization and also provide the low phonon energy environment in oxyfluoride glass. Therefore,a structure model to describe this phase separated glass system is in great help for designing optical materials with high luminescence. In this study, large-scale molecular dynamics (MD) simulations were performed to understand the structural heterogeneity and make attempt to propose a structure model for fluor oaluminosilicate glass. The simulation results reveal immiscible behaviors of the fluoroaluminosilicate glass that separate into fluoride-rich phase and aluminosilicate-rich residual matrix, which have structural features ana logous to fluoride and aluminosilicate glass, respectively. Besides, Al3+ plays an essential role to inter-connect oxygen and fluorine ions on the oxide-fluoride phase interface, maintaining the stability of the glass system.
2019年6月 香港城市大学王锋副教授来访，作关于“Exploring Lanthanide Luminescence in Nano\/Microstructured Materials”的邀请报告。
2019年5月 祝贺课题组赵君婕同学关于SiO2-Al2O3-Rf3-NaF玻璃的论文被The journal of physical chemistry接受。Junjie Zhao， Xiuxia Xu, Pengcheng Li, Xinyue Li, Daqin Chen， Xvsheng Qiao,Jincheng Du, Guodong Qian, and Xianping Fan (2019). ' Structural Origins of Rf3\/NaRF4 Nanocrystal Precipitation from Phase-Separated SiO2-Al2O3-Rf3-NaF Glasses: A Molecular Dynamics Simulation Study.' The journal of physical chemistry 2019, 123, 3024-3032.
Oxyfluoride glass-ceramics with RF3 or NaRF4 (R3+: rare earth elements) nanocrystals are considered as favorable hosts for luminescence applications. In this work, we utilized large-scale molecular dynamics (MD) simulations with effective partial charge potentials to study a series of oxyfluoride glasses that are of interest to the precipitation of RF3 or NaRF4 nanocrystals as previous experiment results suggested. The results show that phase separation exists in all glass compositions with fluoride-rich regions made up of R3+, Na+, and F− and oxide-rich regions consisting of aluminosilicate networks. These fluoride-enriched regions can serve as the precursor for RF3, cubic and hexagonal NaRF4, and NaF crystal precipitation. The results also confirm that the concentration of Na+ in the fluoride phase plays a key role in determining the crystal phases (RF3,NaRF4, or NaF) and crystal structure (cubic vs hexagonal NaRF4) to be precipitated. Consequently, this study shows that MD simulations with effective potentials can fill the gap in the structural understanding of oxyfluoride glass and provide insights into atomic scale information of the phase separation behavior that is useful in predicting the potential crystal types in oxyfluoride glass. When coupled with experimental validations, these simulations can expedite the exploration of novel luminescent oxyfluoride glass ceramics
2019年4月 祝贺课题组徐秀瑕同学关于银离子掺杂玻璃的论文被ACS Applied Nano Materials接受。Xiuxia Xu,Junjie Zhao, Xue Luo, Ronghua Ma, Jiangyun Qian, Xvsheng Qiao, Jincheng Du,Guodong Qian, Xianghua Zhang, and Xianping Fan (2019). ' Stabilization of Fluorescent [Agm]N+ Quantum Clusters in Multiphase Inorganic Glass-Ceramics for White Leds.' ACS Applied Nano Materials 2019, 2, 2854-2863.
Silver quantum clusters ([Agm]n+ QCs) are a type of efficient broadband fluorescence centers with m and n related quantum size effects but usually lack chemical and thermal stability. To solve such a problem and exploit [Agm]n+ QCs potential applications in white LED lighting, [Agm]n+ QCs and rare earth ions (RE3+) were designed to be selectively enriched into B2O3-rich spinodal nanophase separation and SrF2 nanocrystals in fluoroborosilicate multiphase glass-ceramics. In this work, Ag\/RE3+-codoped glasses and glass-ceramics with a designed composition were prepared through a melt-quenching method and subsequent heat treatment. The B2O3-rich spinodal nanophase separation and SrF2 nanocrystals were stepwise formed in these glass-ceramics. Taking Ag\/Er3+-codoped glass-ceramics for an example, the special microstructures were clearly revealed by transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), scanning transmission electron microscopy (STEM), and energy-dispersive X-ray spectroscopy (EDX) mappings. By the strategies of controlling [Ag+] solubility and charge compensating to [AlO4]−, [BO4]−, and [ZnO4]2− tetrahedra, a large quantity of [Agm]n+ QCs were stabilized in the glass networks with regulated m and n. By the strategies of RE3+\/Al3+ and Ag+\/Na+ competitive distribution, the solubility of Ag+ in B2O3-rich glassy phases was effectively increased, and [Agm]n+ QCs were eventually stabilized to withstand the postcrystallization procedures at high temperatures up to 650 °C. By the multiphase strategy, Ag and RE3+ were selectively partitioned into the B2O3-rich nanosize glassy phases and SrF2 nanocrystals, respectively. Thus, energy transfers (ETs) between [Agm]n+ and RE3+ can be well-suppressed to enhance the photoluminescence quantum yields (PL QYs) of the multiphase glass-ceramics. Those engaged [Agm]n+ with largely improved white light-emitting diode (WLED) performances, e.g., QY and color rendering index (CRI), in the glass-ceramics. This suggests that Ag\/RE3+-codoped glass ceramics can be ideal candidate phosphors for high-power WLED lighting devices
2019年3月 福建师范大学教授陈大钦来访，作关于“无机氧化物玻璃相选择析晶研究”的学术报告。
2018年11月 受邀参加华东四校材料青年****2018论坛(浙江，绍兴)
2018年11月 华中科技大学翟天佑教授来访（****，****），作关于“金属硫属二维材料的气相控制合成与光电探测性能”的邀请报告。
2018年11月 湖南大学潘安练教授来访（****），作关于“低维半导体结构能带调控及光子特性研究”的邀请报告。
2018年11月 受邀参加中国功能玻璃学术研讨会暨新型光电子材料国际论坛(云南，昆明),作题为“无机玻璃稳定的银量子团簇构型调控与光谱学性能研究”的邀请报告。
2018年10月参加第九届亚洲纳米科学和纳米技术会议(AsiaNANO 2018) (中国，青岛)，承担第六分会场组委会工作(session-6-Info-nano science & technologies，分会主席 钱国栋教授）。
2018年9月 祝贺课题组陈烁同学关于(SnxSb1-x)2Se3光电探测应用基础研究的论文被JMCC接受。Chen, S., K. Shehzad, X. Qiao, X. Luo, X. Liu, Y. Zhang, X. Zhang, Y. Xu and X. Fan (2018). 'A high performance broadband photodetector based on (SnxSb1−x)2Se3 nanorods with enhanced electrical conductivity.' Journal of Materials Chemistry C.
The Sb2Se3 is highly interesting narrow band gap semiconductor with promising applications in new-generation electronic and photoelectronic devices. However, it has intrinsically low electrical conductivity which limits its broader scope of applications. To overcome this challenge, the Sn-doped Sb2Se3 ((SnxSb1-x)2Se3) nanorods with enhanced electrical conductivity are firstly synthesized via a facile hot-injection method. With increasing doping concentration of Sn4+, the (SnxSb1-x)2Se3 nanorods exhibit several orders of magnitude improvement in electrical conductivity which originates from increase of carrier concentration. The photodetector based on the (SnxSb1-x)2Se3 nanorod film shows a higher responsivity (6.21 A\/W) and external quantum efficiency (906%), lower noise equivalent power (3.14×10-13 W\/Hz1\/2), and fast response time (0.04 s), surpassing the performance of the Sb2Se3 nonorod film photodetector. In addition, the (SnxSb1-x)2Se3 nanorod film photodetector also displays a broadband spectral response ranging from UV to IR. Those excellent performances unambiguously demonstrate that the (SnxSb1-x)2Se3 nanorods are promising for the utilizations as highly efficient broadband photodetectors.
2018年8月 祝贺课题组陈晓桐同学关于银量子团簇掺杂发光玻璃的论文被PCCP接受。Chen, X., et al. (2018). 'Phase separation strategies to facilely form fluorescent [Ag2]2+\/ [Agm]n+ quantum clusters in boro-alumino-silicate multi-phase glasses.' Physical Chemistry Chemical Physics. DOI:10.1039\/C8CP04536D
By adjusting the content of ZnF2-SrF2\/ZnO-SrO, a series of SiO2-Al2O3-B2O3-Na2O-ZnO\/ZnF2-SrO\/SrF2-Ag multi-phase glasses were designed and prepared via melt-quenching method. Under a phase separation strategy, negatively charged tetrahedrons ([BO4]-, [ZnO4]2-, and [AlO4]-) can be generated to stabilize different silver species (Ag+ ions; [Ag2]2+ pairs; [Agm]n+ quantum clusters (Ag QCs)) in B2O3-rich and ZnO-Al2O3 rich sub-phases. B2O3-rich sub-phase has high solubility of Ag+ ions and [Agm]n+ QCs. Fluoride-rich phase shows good ability to extract Na+ from B2O3-rich sub-phase, significantly affect the solubility of Ag+ in B2O3-rich sub-phase, and eventually determine the aggregation from Ag+ ions and Ag0 atom to [Agm]n+ QCs. ZnO- Al2O3-rich or ZnO-SiO2-rich (i.e. SiO2-rich in GZnOSrO) phase has relatively high solubility of [Ag2]2+ pairs. The Ag+\/ [Ag2]2+\/ [Agm]n+ QCs fluorescent centers were identified with spectroscopic analysis, where the fluorescence bands are located in ultraviolet, green-white and orange spectral region, respectively. The fluorescent quantum yield (QY) of [Agm]n+ QCs can be well improved to 55.7%, and the combination of these three luminescent centers can achieve white light emission.
2018年8月 香港城市大学王锋副教授来访，作关于“Combatting concentration quenching in lanthanide-doped upconversion nanoparticles”的邀请报告，完成教育部“香港与内地高等学校师生交流计划”项目，来访人员还包括香港城市大学王锋副教授课题组的两位博士生。
2018年7月 访问德国Kiel大学Lorenz Kienle教授课题组和Leibniz表面工程研究所Andriy Lotnyk博士课题组，作关于“Chalcogenide Photodector Materials: Preparation, Properties and Applications”的学术报告。
2018年7月 受邀参加15th International Conference on the Physics of Non-CrystallineSolids & 14th European Society of Glass Conference (PNCS-ESG 2018)国际会议(法国 St. Malo),作题为 Phase separation and crystallization strategies to enhance the PL of Ag\/Re doped multi-phase glass and glass-ceramics的国际会议邀请报告。
2018年5月 作为分会秘书长组织浙江大学材料科学与工程学院-第三届先进材料微结构与性能国际研讨会暨40周年院庆材料创新论坛-光子功能材料分论坛。
2018年5月 参加美国陶瓷学会2018 Glass and Optical Materials Division (GOMD) Meeting (美国San Antonio)，作题为“Several strategies to stabilize [Agm]n+ quantum cluster in borofluorosilicate glass”的学术报告。
2018年2月 祝贺课题组万军同学关于SrAl2O4：Eu2+纳米荧光粉的论文被JMCC接受。Wan, J., et al. (2018). 'Facile synthesis of monodisperse SrAl2O4:Eu2+ cage-like microspheres with excellent luminescence quantum yield.' Journal of Materials Chemistry C. DOI: 10.1039\/C7TC05203K
Commercial LED phosphors are usually prepared by a conventional solid-state reaction method and subsequent ball milling process, which often result in non-uniform size distributions, irregular shape and impurity contamination of the phosphors. In this work, the SrAl2O4:Eu2+ cage-like microspheres with uniform size distribution and excellent photoluminescence (PL) quantum yield (QY) are prepared by an epoxide-driven sol-gel route and subsequent heat treatment in reducing atmosphere. This unique cage-like microstructure not only makes better use of excited light but also significantly increase PL quenching concentration of the Eu2+ ions. The optimum internal QY of the SrAl2O4:Eu2+ cage-like microspheres is measured to be up to 94.94%, much higher than the highest internal QY (55%) of the SrAl2O4:Eu2+ phosphors reported so far. The approach may be readily applied to prepare other lanthanide ions doped cage-like microspheres, implying a new route for preparing highly efficient PL phosphors with regular shape and uniform particle size.
2017年12月 访问华东理工大学曾惠丹教授课题组，作题为“利用分相与晶化调控局域掺杂格位及光子功能玻璃陶瓷应用前景探讨”的邀请报告。
2017年12月 参加第九届全国稀土发光材料学术(广州)研讨会暨国际论坛，作题为“球形单分散形貌铝酸盐荧光粉”的邀请报告。
2017年11月 受邀访问杭州电子科技大学陈大钦课题组，作题为“Luminescent Glass-ceramics Containing Fluoride, Aluminate and Borate Subphases for WLED Application”的邀请报告。
2017年10月 祝贺课题组王长建同学关于稀土发光温度传感论文被RSC Advances接受。Wang, C., et al. (2017). 'Dual mode temperature sensing through luminescence lifetimes of F- and O-coordinated Cr3+ sites in fluorosilicate glass-ceramics.' RSC Advances 7(83): 52435-52441. DOI: 10.1039\/c7ra10864h
Luminescence lifetime based temperature sensing has an intrinsic immunity to the influence of external conditions, and dual mode thermometry is highly accurate due to its 'self-calibration' merit. To develop thermometry with both features, we investigated the phase and microstructural evolution of Cr3+-doped calcium-fluorosilicate glass and glass-ceramics, which revealed different luminescent behavior relating to the different Cr3+ sites in the materials. From the photoluminescence (PL) spectra, the emission at 717 nm was derived from the O-coordinated octahedral sites, while the 1 [small mu ]m super-broad emission was assigned to the F-coordinated octahedral sites. After an annealing treatment, cubic CaF2 nanocrystals were homogeneously precipitated in the glass-ceramics; thus, both the O-coordination in the residual glass phase and F-coordination in the CaF2 crystalline phase were strengthened. This led to the enhancement of both the emissions at 717 nm and 1 [small mu ]m. The O-coordinated sites were relatively strong-field sites in which the fluorescence of Cr3+ originated from the radiative transitions of the two thermally coupled energy levels, 2E and 4T2, while the F-coordinated sites were relatively weak-field sites. Hence, the Cr3+ exhibits only one excited state 4T2, which is inactivated by radiative transitions and non-radiative transitions from the thermal quench. Based on the obtained results, the maximum relative temperature sensitivity coefficients are 0.76% K-1 at 498 K for the 717 nm emission and 0.47% K-1 at 351 K for the 1 [small mu ]m emission. This provides the possibility of developing a dual mode temperature sensor with high precision only using a single material.
2017年10月 参加第三届中国稀土发光(重庆)青年论坛，作题为“Multi-phase Oxyfluoride Glass and Glass-cermics: Phase separation induced crystallization, Selective Enrichment and QY enhancement”的邀请报告。
2017年10月 受邀参加2017年稳态-瞬态光谱最新技术和应用(杭州)研讨会，作题为“发光材料的结构调控、光谱学性能优化与发光机理研究”的邀请报告。
2017年8月 祝贺课题组张雨婷同学关于球形纳米YAG荧光粉的论文被JMCC接受。Zhang, Y., et al. (2017). 'Facile synthesis of monodisperse YAG:Ce3+ microspheres with high quantum yield via an epoxide-driven sol-gel route.' Journal of Materials Chemistry C 35: 8952-8957. DOI: 10.1039\/c7tc02909h
Spherical cerium-doped yttrium aluminum garnet (YAG:Ce3+) phosphor particles can achieve both higher packing densities and lower scattering of light, and thus make it possible to obtain excellent white-light-emitting diode performance. In this study, monodisperse YAG:Ce3+ microspheres have been synthesized through a fast epoxide-driven sol-gel route and subsequent heat treatment under a reducing atmosphere. The spherical morphology was mainly influenced by the phase separation and gelation process, which could be controlled by the ratio of water\/ethanol. Pluronic F127 was introduced into the sol-gel system to control the size of the YAG:Ce3+ microspheres, which significantly increased the luminescence intensity of the YAG:Ce3+ microspheres. The luminescence quantum yield of the 6 mol% Ce3+ ion doped YAG microspheres was measured to be more than 90%, which was as high as that of commercial YAG:Ce3+ phosphors. This approach may be readily applied to prepare a broad range of rare earth doped microspheres, implying a new route for the preparation of LEDs phosphors with regular shape and high quantum yield.
2017年8月 访问法国蒙彼利埃Charles Gerhardt (UMR CNRS 5253) 研究所的Michel WONG CHI MAN (Head of Nanostructured silica-based materials team)研究员课题组。
2017年8月 访问法国蒙彼利埃Charles Gerhardt (UMR CNRS 5253) 研究所的Michel WONG CHI MAN (Head of Nanostructured silica-based materials team)研究员课题组。
2017年7月 主办“光电功能材料与器件-青年****(杭州)国际论坛”，作题为“多相发光玻璃陶瓷结构优化、离子选择性富集与价态调控”的学术报告。
2017年6月 祝贺课题组马荣华博士生论文被Phys. Chem. Chem. Phys.接受。Ronghua Ma, Junjie Zhao, Xiaotong Chen, Xvsheng Qiao, Xianping Fan, Jincheng Du and Xianghua Zhang, “Stabilization of ultra-small [Ag2]2+ and [Agm]n+ nano-clusters through negatively charged tetrahedrons in oxyfluoride glass networks: To largely enhance the luminescence quantum yields”, Physical Chemistry Chemical Physics, 2017, DOI: 10.1039\/C7CP02531A
2017年6月 访问昆明理工大学邱建备教授课题组，作题为“多相发光玻璃陶瓷结构优化、离子选择性富集与价态调控”的邀请报告。
2017年5月 美国西北太平洋国家实验室首席材料科学家、华盛顿大学教授Jim De Yoreo 来访，作题为“Investigating crystal nucleation and transformation using liquid cell TEM and AFM”的邀请报告。
2017年5月 德国Kiel University的Kienle教授来访，作题为“Nanoscale Analysis of Advanced Engineering Materials”的邀请报告；德国Leibniz Institute of Surface Modification 的Lotnyk博士来访，作题为“LOCAL STRUCTURE INVESTIGATIONS OF PHASE-CHANGE ALLOYS”的邀请报告。
2017年5月 参加第九届“中国功能玻璃学术研讨会暨新型光电子材料国际论坛”，作题为“氟硅酸盐发光玻璃陶瓷的分子动力学模拟与组成设计”的邀请报告。
2017年5月 参加中国稀土学会2017学术年会，作题为“基于离子选择性富集行为调控银\/稀土共掺发光玻璃陶瓷的能量传递过程与量子效率”的邀请报告。
2017年4月 吉林大学张宇教授来访，作题为“Inorganic Perovskite Quantum Dots for Efficient Solid State Lighting and Display”的邀请报告。吉林大学白雪副教授来访，作题为“Efficient photoluminescent metal oxide hybrid nanophosphors for single-phase white LEDs”的邀请报告。
2017年4月 访问哈尔滨工业大学周欣副教授课题组和黑龙江大学潘清江教授课题组，作题为“氟硅酸盐发光玻璃陶瓷分子动力学模拟、结构调控与光谱学性能研究”的邀请报告。讨论关于“DFT模拟贵金属纳米团簇光谱学性能”的研究课题
2017年3月 访问浙江师范大学郭海教授课题组，作题为“纳米多孔二氧化硅光学功能薄膜的溶胶-凝胶法制备与性能研究”的邀请报告。
2017年3月 祝贺课题组肖尧同学和王媛同学顺利通过硕士论文答辩，获得科学硕士学位。肖尧硕士论文题目：“纳米多孔二氧化硅光学功能薄膜的溶胶-凝胶法制备与性能研究”；王媛硕士论文题目：“氮化铝微球的制备及其在高导热复合材料中的应用”。
2017年3月 祝贺课题组万军同学和吴一民同学顺利通过博士论文答辩，获得工学博士学位。万军博士论文题目：“应用于白光LED的铝基发光材料的制备与发光性能研究”；吴一民博士论文题目：“硒化物半导体材料制备及其光电与热电性能研究”。
2017年2月 祝贺课题组陈烁博士生论文被Small接受。'Facile synthesis of γ-In2Se3 nanoflowers towards high performance self-powered broadband γ-In2Se3\/Si heterojunction photodiode' (Full Paper, No. smll.R1).
2017年1月 北京，作为理事参加中国硅酸盐学会电子玻璃分会十届一次理事会暨技术研讨会，作题为“三维光子带隙结构调控稀土离子上转换发光性质及机理研究”的邀请报告。
2016年12月 昆明理工大学邱建备教授和杨正文教授来访，分别作关于稀土光电功能材料和题为“三维光子带隙结构调控稀土离子上转换发光性质及机理研究”的学术报告。
2016年11月 课题组博士生陈冰J. Phys. Chem. Lett.上发表论文！Chen B, Liu Y, Xiao Y, Chen X, Li Y, Li M, Qiao X, Fan X, Wang F. Amplifying Excitation-Power Sensitivity of Photon Upconversion in a NaYbF4:Ho Nanostructure for Direct Visualization of Electromagnetic Hotspots[J]. J Phys Chem Lett, 2016 (23): 4916-4921.
2016年11月 课题组硕士生肖尧在RSC Advances上发表论文！Xiao Y, Ma R, Wang C, Chen X, Qiao X, Fan X. High performance hierarchical nanoporous antireflective films by a facile sol-gel process[J]. RSC Advances, 2016 (115): 113911-113918.
2016年11月 中山大学王静教授来访，作题为“半导体照明与显示用稀土发光材料”学术报告。
2016年10月 长沙，参加2016中国溶胶－凝胶学术研讨会暨国际论坛会议，作题为“High performance hierarchical nano-porous antireflective films by sol-gel processes”学术报告。硕士生张雨婷作“Facile Synthesis of Monodisperse AlN Microspheres and enhanced red luminescence via Mn2+ doping”学术报告。
2016年9月 国家自然科学基金面上项目被批准。项目批准号：**，项目名称：基于微分相调控晶化与选择性富集增强发光的LED照明用多相白光玻璃陶瓷研究 ，项目起止年月：2017年01月至 2020年 12月。
2016年8月 俄罗斯Nizhny Novgorod，参加2016国际“非氧化物与新型光学玻璃(ISNOG)”会议，作题为“Luminescent Glass-ceramics Containing Fluoride, Aluminate and Borate Subphases for WLED Application”学术报告。
2016年8月 祝贺课题组硕士生王媛在RSC Advances上发表论文！Wang Y, Qiao X, Wan J, Xiao Y, Fan X. Preparation of AlN microspheres\/UHMWPE composites for insulating thermal conductors[J]. RSC Advances, 2016 (83): 80262-80267.
2016年6月-7月 受教育部香港与内地高校师生交流计划2016第一批项目资助，香港城市大学博士生杨雪清、孙天瀛、杜阳阳来访，开展“用于减反射膜的高效稀土光谱转换纳米空心球研究”。
2016年6月 苏州大学孙洪涛教授来访，作题为“铋离子激活新型发光材料的研究”学术报告。
2016年6月 祝贺课题组许倩本科生以小组第一名的成绩顺利通过毕业答辩，获得学士学位！毕业论文题目：氟硅酸盐玻璃体系的分子动力学模拟计算。
2016年6月 香港城市大学王锋博士来访，作题为“Rational photon upconversion in core-shell nanoparticles”的学术报告。
2016年6月 祝贺课题组赵君婕、陈烁和程文煜分别获得CSC资助，赴美国、法国雷恩和法国巴黎进行联合培养博士生计划！
2016年5月 宁波，访问宁波大学戴世勋老师课题组。
2016年4月 北京，中硅会电子玻璃分会十届一次理事会暨技术研讨会，被选为常务理事。
2016年4月 上海，第24届国际玻璃大会(ICG2016)。作题为“Molecular Dynamics Simulation on SiO2-Al2O3\/AlF3-BaO\/BaF2-Na2O\/NaF Glass Systems”的会议报告。博士生马荣华作题为“Tunable luminescence of Ag+-doped oxyfluoride glasses”的poster。
2016年3月 祝贺课题组本科生许倩同时拿到斯坦福、伯克利和MIT的offer！
2016年3月 欢迎浙江大学陈晓桐、罗雪、沈斌华三位本科生即将加入课题组攻读硕士学位！
2016年3月 祝贺高骏同学硕士毕业！毕业论文题目：铜掺杂磷硅酸盐玻璃的制备与光谱学性能研究。
2016年3月 课题组博士生吴一民在Journal of Solid State Chemistry上发表论文！Wu Y, Korolkov I, Qiao X, Zhang X, Wan J, Fan X. Facile synthesis of CuSe nanoparticles and high-quality single-crystal two-dimensional hexagonal nanoplatelets with tunable near-infrared optical absorption[J]. Journal of Solid State Chemistry, 2016: 279-283.
2016年3月 合作通讯作者论文发表！Sun T, Ma R, Qiao X, Fan X, Wang F. Shielding Upconversion by Surface Coating: A Study of the Emission Enhancement Factor[J]. ChemPhysChem, 2016 (5): 766-770.
2016年2月 Chen S, Qiao X, Wang F, Luo Q, Zhang X, Wan X, Xu Y, Fan X*. Facile synthesis of hybrid nanorods with the Sb2Se3\/AgSbSe2 heterojunction structure for high performance photodetectors[J]. Nanoscale, 2016 (4): 2277-83.
2016年1月 Ma R, Gao J, Xu Q, Cui S, Qiao X*, Du J, Fan X. Eu2+ promoted formation of molecule-like Ag and enhanced white luminescence of Ag\/Eu-codoped oxyfluoride glasses[J]. Journal of Non-Crystalline Solids, 2016: 348-353.
column_name
个人简介
