文献类型：期刊文献

英文题名：A polymer-coated template-confinement CsPbBr3 perovskite quantum dot composite

作者：Shen, Jianhua[1];Wang, Yu[1];Zhu, Yihua[1];Gong, Yiqin[1];Li, Chunzhong[2]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Frontiers Sci Ctr Mat & Dynam Chem,Minist Educ, Key Lab Ultrafine Mat,Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, Shanghai Engn Res Ctr Hierarch Nanomat, Shanghai 200237, Peoples R China

年份：2021

卷号：13

期号：13

起止页码：6586

外文期刊名：NANOSCALE

收录：;EI(收录号：20211510207361);WOS:【SCI-EXPANDED(收录号:WOS:000632979800001)】；

基金：This work was supported by the National Natural Science Foundation of China (21676093, 21776092, 21978087, 21838003 and 91834301), the Shanghai Scientific and Technological Innovation Project (19JC1410400 and 18JC1410600), Shanghai Rising-Star Program (18QA1401500), the Innovation Program of Shanghai Municipal Education Commission, Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutes of High Learning, Shanghai Rising-Star Program (18QA1401500) and the Fundamental Research Funds for the Central Universities (222201718002).

语种：英文

外文关键词：Cesium compounds - Crosslinking - Silica - Nanocrystals - Semiconductor quantum dots - Lead compounds - Cadmium compounds - Linoleic acid - Metal halides - Plastic coatings - Perovskite - Photoluminescence - Surface defects

摘要：Metal halide perovskites show abundant photophysical properties and great potential in photovoltaic and electroluminescence devices, but their poor stability is an obvious shortcoming. Here, we successfully synthesized polymer-coated CsPbBr3 quantum dots (QDs) grown in situ on a template. Conjugated linoleic acid (CLA) is used as a ligand to passivate the surface defects of QDs. QDs can be used as photoinitiators in polymerization to initiate CLA crosslinking under illumination, thereby forming polymer coatings to improve the stability of QDs. The mesoporous silica microspheres are used as templates to make CsPbBr3 QDs grow in situ in the pores and avoid the size growth and agglomeration of QDs. The obtained composite material has a narrow full width at half maximum and an absolute photoluminescence quantum yield of 79.16%. Due to the protection of the hydrophobic polymer layer, it can still maintain 77% of the photoluminescence intensity after soaking in water for a week.