Highly photo-stable CsPbI3 perovskite quantum dots via thiol ligand exchange and their polymer film application

被引：29
作者：
Baek, Seungmin [1 ]
Kim, Yongjin [1 ]
Kim, Sang-Wook [1 ]
机构：
[1] Ajou Univ, Dept Mol Sci & Technol, Nanomat Lab, Suwon 16499, South Korea
来源：
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY | 2020年 / 83卷
基金：
新加坡国家研究基金会;
关键词：
Ligand exchange; Thiol-capped CsPbI3 perovskite quantum dots; Photo-stability; QD films; SOLAR-CELLS; NANOCRYSTALS; LAYERS; TRANSFORMATION; EMISSION; BR; CL;
D O I：
10.1016/j.jiec.2019.11.038
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Highly photo-stable CsPbI3 perovskite quantum dots (PeQDs) were prepared using thiol as an exchanged ligand. Among the CsPbX3 PeQDs, CsPbI3 with common capping ligands such as oleic acid (OA) and oleylamine (OLA) was particularly unstable and the optical properties were readily degraded because of its structural instability. To overcome these problems, thiol (-SH) as an exchanged ligand was used to stabilize the structure and could maintain the structural and optical properties. The synthesized CsPbI3 exhibited highly improved photo-stability under ultraviolet (365 nm) irradiation by ligand exchange from OA and OLA to thiol. As an application, perovskite films were fabricated using the PeQDs and a cyclic olefin copolymer (COC). The thiol-treated PeQD films exhibited higher stability than the untreated films under irradiation with a blue light-emitting diode (LED). (C) 2019 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：279 / 284
页数：6
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