外文题目: BaCdSnS4 and Ba3CdSn2S8: syntheses, structures, and non-linear optical and photoluminescence properties
作者: Zhen, Ni; Wu, Kui; Wang, Ying; Li, Qiang; Gao, Wenhui; Hou, Dianwei; Yang, Zhihua; Jiang, Huaidong; Dong, Yongjun; Pan, Shilie
刊名: Dalton Trans.
年: 2016 卷: 45 期: 26 页： 10681--10688
英文关键词:

2ND-HARMONIC GENERATION RESPONSE; LASER DAMAGE THRESHOLD; CRYSTAL-STRUCTURE; ABSORPTION-EDGE; SHG RESPONSES; GE; SE; CHALCOGENIDES; SN; SI
英文摘要:
Two non-centrosymmetric metal chalcogenides, BaCdSnS4 and Ba3CdSn2S8, were synthesized using a high temperature solid-state reaction in an evacuated silica tube. Although the two compounds have the same building units in their structures, namely CdS4, SnS4 and BaS8 units, both of them have different structures. BaCdSnS4 crystallizes in the orthorhombic space group Fdd2 and its structure can be characterized by the two-dimensional (infinity)[Cd-Sn-S] layers composed of corner- and edge-sharing CdS4 and SnS4 tetrahedra with Ba atoms located between the two adjacent (infinity)[Cd-Sn-S] layers. Ba3CdSn2S8 crystallizes in the space group I (4) over bar 3d of the orthorhombic system and the CdS4 and SnS4 groups are connected with each other via corner-sharing to form a three-dimensional framework, which is different from the 2D (infinity)[Cd-Sn-S] layer structure in BaCdSnS4. The UV-vis-NIR diffuse-reflectance spectra show that the experimental band gaps are about 2.30 eV for BaCdSnS4 and 2.75 eV for Ba3CdSn2S8, respectively. IR and Raman measurement results indicate that their transparent ranges are up to 25 mu m. Second-order NLO measurements show that BaCdSnS4 exhibits strong powder second-harmonic generation (SHG) intensities at 2.09 mu m laser pumping that are similar to 5 and 0.7 times that of AgGaS2 in the particle size 38-55 and 150-200 mu m, respectively, whereas Ba3CdSn2S8 only exhibits SHG intensities of about 0.8 and 0.1 times that of AgGaS2 at the same particle sizes. The origin of the NLO response in BaCdSnS4 may originate from the macroscopic arrangement of the SnS4 and CdS4 tetrahedra. Furthermore, the photoluminescence properties of the two compounds have also been investigated and show obvious blue and green light emission.


文献类型: 期刊论文
正文语种: English
收录类别: SCIEI
DOI: 10.1039/c6dt01537a


全文传递服务