Transparent Ceramics Research Center, SICCAS
Key Laboratory of Transparent Opto-fuctional Inorganic Materials, CAS
中国科学院上海硅酸盐研究所 透明陶瓷研究中心
中国科学院 透明与光功能无机材料重点实验室
荧光粉红色发光性能调控和设计制备
报告人:吴明娒 教授
(中山大学化学学院)
时间:8月11日 (星期五)14:15 PM
地点:长宁园区4号楼14楼第1会议室
联系人:李江(52412816)
报告摘要: 红色成分可以提高LED器件的显色指数,可使器件变得更为暖和。Eu3+稀土离子具有特征红色发光性能,但是由于Eu3+稀土离子的f-f跃迁在蓝光区域吸收窄,本报告首先讨论了利用(Tb3+)n→Eu3+ 或者 Ce3+→(Tb3+)n→Eu3+能量传递以及结晶学的结构调控以提高在蓝光区域的吸收和发光性能;其次讨论了一些在蓝光区域具有宽吸收和在红光区域具有窄带发光的Mn4+氟化物。最后,利用拓扑化学转化和外延生长机理,控制生长了具有特定化学成分、结晶学结构以及微纳结构的氟化钇钠,并研究了发光性能的调控。
参考文献:
[1] J. Li, J. Shi, M. Wu and Q. Su, “K2Ln(PO4)(WO4):Tb3+,Eu3+ (Ln = Y, Gd and Lu) phosphors: highly efficient pure red and tuneable emission for white light-emitting diodes,” J. Mater. Chem. C, vol. 3, pp. 2107-2114, 2015. (d) F. Xie, J. Li, Z. Dong, D. Wen, J. Shi, J. Yan and M. Wu, “Energy transfer and luminescent properties of Ca8MgLu(PO4)7:Tb3+/Eu3+ as a green-to-red color tunable phosphor under NUV excitation,” RSC Adv., vol. 5, pp. 59830-59836, 2015. (e) (b) D. W. Wen, J. X. Shi, M. M. Wu and Su Q, “Studies of Terbium Bridge: Saturation Phenomenon, Significance of Sensitizer and Mechanisms of Energy Transfer, and Luminescence Quenching ”, ACS Appl. Mater. Interfaces, vol. 6, 10792-10801, 2014.
[2] (a) Q. Zhou, Y. Y. Zhou, Y. Liu, Z. L. Wang, G. Chen, J. H. Peng, J. Yan and M. M. Wu, “A new and efficient red phosphor for solid-state lighting: Cs2TiF6:Mn4+” , J. Mater. Chem. C, vol. 3, 9615-9619, 2015. (b) Zhou Q., Zhou Y. Y., Liu Y., Luo L. J., Wang Z. L., Peng J. H., Yan J. and Wu M. M., “A new red phosphor BaGeF6:Mn4+: hydrothermal synthesis, photo-luminescence properties, and its application in warm white LED devices”, J. Mater. Chem. C, vol.3, 3055-3059, 2015. (c) Q. Zhou, H. Y. Tan, Y. Y. Zhou, Q. H. Zhang, Z. L. Wang, J. Yan and M. M. Wu, “Optical performance of Mn4+ in a new hexa-coordinated fluorozirconate complex of Cs2ZrF6”, J. Mater. Chem. C, vol. 4, 7443-7448, 2016.
[3] (a) J. Yan, H. H. Yao, J. H. Li., S. M. He, Q. L. Wu, X. F. Yang, W. U. Khan, J. X. Shi and M. M. Wu, “Hexagonal β-Na(Y,Yb)F4 based core/shell nanorods: epitaxial growth, enhanced and tailored up-conversion emission”, RSC Adv., vol. 7, 19205-19210, 2017. (b) J. L. Zhuang, X. F. Yang., B. F. Lei, H. R. Zhang, M. M. Wu, Y. L. Liu, “In Situ Topotactic Synthesis of Monodispersed Hierarchically Nanostructured Yttrium-Based Microspindles from a Mesocrystal Precursor”, Eur. J. Inorg. Chem., 3990-3993, 2016. (c) J. L. Zhuang, X. F. Yang, J. X. Fu, C. L. Liang, M. M. Wu, J. Wang and Q. Su, “Monodispersed β-NaYF4 Mesocrystals: In Situ Ion Exchange and Multicolor Up- and Down-Conversions”, Cryst. Growth Design, vol. 13, 2292?2297, 2013. (d) J. L. Zhuang, J. Wang, X. F. Yang, I. D. Williams, W. Zhang, Q. Y. Zhang, Z. M. Feng, Z. M. Yang, C. L. Liang, M. M. Wu and Q. Su, “Tunable Thickness and Photoluminescence of Bipyramidal Hexagonal β-NaYF4 Microdisks”, Chem. Mater., vol. 21, 160-168, 2009.
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