文献类型：期刊文献

英文题名：Aluminum Distearate-Modified CsPbX3 (X = I, Br, or Cl/Br) Nanocrystals with Enhanced Optical and Structural Stabilities

作者：Xue, Weinan[1,2];Wang, Xiaoyan[1,2];Wang, Wei[1,2];He, Fangfang[1,2];Zhu, Wei[1,2];Li, Yan[1,2]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2020

卷号：2

期号：2

起止页码：13

外文期刊名：CCS CHEMISTRY

收录：WOS:【ESCI(收录号:WOS:000794105100002)】；

基金：This research was supported by the National Natural Science Foundation of China (grant nos. 21771063 and 21975075), the State Key Research Development Program of China (grant no. 2016YFA0204200), the Shanghai Municipal Science and Technology Major Project (grant no. 2018SHZDZX03), and the Programme of Introducing Talents of Discipline to Universities (B16017). We also thank Prof. Fuyou Li and Dr. Qianwen Zhou from Fudan University for the measurements of PLQY and PL lifetime of the samples.

语种：英文

外文关键词：perovskite nanocrystal; cesium lead halide; aluminum distearate; multidentate ligand; stability

摘要：Colloidal all-inorganic perovskite nanocrystals (PNCs), possessing unique optical properties, have attracted considerable attention in the field of semiconductor nanocrystals (NCs), but their application is hindered by the stability issue resulting partly from dynamic capping ligand binding. Herein, we report a simple method for the synthesis of all-inorganic cesium lead-based (CsPbX3) NCs with enhanced structural stability and photoluminescence quantum yield. Aluminum distearate (AlDS) was introduced into the preparation of CsPbX3 NCs, on the basis that the surface defects of CsPbX3 NCs are passivated to form a protective layer on the CsPbX3 NC surface simultaneously. Benefiting from surface modification, the resistance of the CsPbX3 NC dispersion against ethanol, ultraviolet irradiation, and heat treatment was enhanced effectively. Moreover, the photoluminescence intensity and stability of the AlDS-modified NC-based films displayed functional superiority to those of pristine NC-based films.