文献类型：期刊文献

中文题名：Highly Stable CsPbBr_(3) Nanocrystal Phosphors by Surface Passivation and Encapsulation

英文题名：Highly Stable CsPbBr3 Nanocrystal Phosphors by Surface Passivation and Encapsulation

作者：Shang Zheliang[1];Xue Weinan[1];Wang Wei[1];Li Yan[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Inst Appl Chem, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China

年份：2022

卷号：38

期号：2

起止页码：588

中文期刊名：Chemical Research in Chinese Universities

外文期刊名：CHEMICAL RESEARCH IN CHINESE UNIVERSITIES

收录：CSTPCD;;Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000797604200042)】；CSCD:【CSCD2021_2022】；PubMed;

基金：This work was supported by the State Key Research Development Program of China(No.2016YFA0204200) and the National Natural Science Foundation of China(Nos.21771063, 21975075).

语种：英文

中文关键词：Perovskite nanocrystal;Phosphor;Surface passivation;Encapsulation;Mesoporous MOF-5

外文关键词：Perovskite nanocrystal; Phosphor; Surface passivation; Encapsulation; Mesoporous MOF-5

摘要：The colloidal all-inorganic CsPbX_(3)(X=I, Br, Cl) perovskite nanocrystals(NCs) with unique optical properties have attracted considerable attention in the field of semiconductor nanocrystals, but their application is hindered by stability issues caused by surface defects and environmental factors. Usually with inert layer encapsulation, the stability of CsPbX_(3) NCs can be significantly enhanced. However, due to the loss of highly dynamic oleic acid/oleylamine ligands, it is usually accompanied by a decrease in the photoluminescence quantum yield(PLQY). Herein, we report a facile method for preparing CsPbBr_(3) NCs based green phosphors with high stability and bright emission. With modification of colloidal CsPbBr_(3) NCs by di-dodecyldimethylammonium bromide and sequent encapsulation in the as-synthesized mesoporous MOF-5, the green emitting phosphors with enhanced stability and a PLQY of 77% were obtained. The phosphors exhibit enhanced resistance against ambient oxygen, UV light, heat treatment and water. These excellent properties show the potential value of our prepared NCs as stable phosphors in light-emitting devices.
The colloidal all-inorganic CsPbX3(X=I, Br, Cl) perovskite nanocrystals(NCs) with unique optical properties have attracted considerable attention in the field of semiconductor nanocrystals, but their application is hindered by stability issues caused by surface defects and environmental factors. Usually with inert layer encapsulation, the stability of CsPbX3 NCs can be significantly enhanced. However, due to the loss of highly dynamic oleic acid/oleylamine ligands, it is usually accompanied by a decrease in the photoluminescence quantum yield(PLQY). Herein, we report a facile method for preparing CsPbBr3 NCs based green phosphors with high stability and bright emission. With modification of colloidal CsPbBr3 NCs by di-dodecyldimethylammonium bromide and sequent encapsulation in the as-synthesized mesoporous MOF-5, the green emitting phosphors with enhanced stability and a PLQY of 77% were obtained. The phosphors exhibit enhanced resistance against ambient oxygen, UV light, heat treatment and water. These excellent properties show the potential value of our prepared NCs as stable phosphors in light-emitting devices.