文献类型：期刊文献

英文题名：Photoluminescence Characteristics of Sn2+ and Ce3+-Doped Cs2SnCl6 Double-Perovskite Crystals

作者：Zhang, Hongdan[1];Zhu, Ludan[1];Cheng, Jun[1];Chen, Long[1];Liu, Chuanqi[1];Yuan, Shuanglong[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China

年份：2019

卷号：12

期号：9

外文期刊名：MATERIALS

收录：;EI(收录号：20192106947243);WOS:【SCI-EXPANDED(收录号:WOS:000469757500142)】；

语种：英文

外文关键词：lead-free perovskite; Cs2SnCl6; doping; photoluminescence

摘要：In recent years, all-inorganic lead-halide perovskites have received extensive attention due to their many advantages, but their poor stability and high toxicity are two major problems. In this paper, a low toxicity and stable Cs2SnCl6 double perovskite crystals were prepared by aqueous phase precipitation method using SnCl2 as precursor. By the XRD, ICP-AES, XPS, photoluminescence and absorption spectra, the fluorescence decay curve, the structure and photoluminescence characteristics of Ce3+-doped and undoped samples have been investigated in detail. The results show that the photoluminescence originates from defects. [+V-Cl] defect complex in the crystal is formed by Sn2+ substituting Sn4+. The number of defects formed by Sn2+ in the crystal decreases with Ce3+ content increases. Within a certain number of defects, the crystal luminescence is enhanced with the number of [+V-Cl] decreased. When Ce3+ is incorporated into the crystals, the defects of [+V-Cl] and [+V-Cl] were formed and the crystal show the strongest emission. This provides a route to enhance the photoluminescence of Cs2SnCl6 double perovskite crystals.