文献类型：期刊文献

英文题名：Room-Temperature in Situ Synthesis of Highly Efficient CsPbBr3/SiO2 Sol in Entirely Ethanol Solvent by Constructing Amine-Functionalized Silica Micelles

作者：Cheng, Jun[1];Yuan, Shuanglong[1];Zhu, Ludan[1];Chen, Long[1];Liu, Chuanqi[1];Tong, Hua[1];Zeng, Huidan[1]

机构：[1]East China Univ Sci & Technol, Inst Inorgan Mat, Shanghai 200237, Peoples R China

年份：2020

卷号：36

期号：13

起止页码：3565

外文期刊名：LANGMUIR

收录：;EI(收录号：20203209007751);WOS:【SCI-EXPANDED(收录号:WOS:000526391800030)】；

语种：英文

外文关键词：Silicon - Cesium compounds - Silica - Lead compounds - Light emission - Organic solvents - Perovskite - Bromine compounds - Sol-gel process

摘要：Cesium lead halide perovskite nanocrystals (CLHP NCs) have drawn considerable attention because of their promising optoelectrical properties. However, owing to extreme vulnerability of CLHP NCs to water and polar alcohols, up to date, most of the synthesis approaches have inevitably adopted ecounfriendly solvents. It is still a big challenge to employ green polar alcohol (ethanol) as a solvent to synthesize CLHP NCs. In this work, we realized a room-temperature in situ synthesis of CsPbBr3/SiO2 sol entirely in ethanol by innovatively constructing amine-functionalized silica micelles, which is originated from the synergistic effect of 3-aminopropyltriethoxysilane and tetraethyl orthosilicate (TEOS) during an acid-catalyzed sol-gel process. The sol exhibited high stability and an absolute photoluminescence quantum yield of 61.9% in ethanol without a further modification process. The light emitting intensity of the sol preserved for 34 days merely declined to 62.1%. This work sheds light on the less common strategy of directly synthesizing CsPbBr3 NCs and long-term stable preservation in a strong polar solvent.