Highly efficient emission and high-CRI warm white light-emitting diodes from ligand-modified CsPbBr_(3) quantum dots

作     者：Dongdong Yan Shuangyi Zhao Yubo Zhang Huaxin Wang Zhigang Zang Dongdong Yan;Shuangyi Zhao;Yubo Zhang;Huaxin Wang;Zhigang Zang

作者机构：Key Laboratory of Optoelectronic Technology&Systems(Ministry of Education)Chongqing UniversityChongqing 400044China Department of PhysicsSouthern University of Science and TechnologyShenzhen 518055China 

出 版 物：《Opto-Electronic Advances》 (光电进展（英文）)

年 卷 期：2022年第5卷第1期

页      面：35-48页

核心收录：

学科分类：07[理学] 08[工学] 070201[理学-理论物理] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(NSFC)(Grant Nos.11974063,11904156) Postdoctoral Science Foundation of China(No.2019M653336).The calcu-lations were done at the Center for Computational Science and Engineering of Southern University of Science and Technology(SUSTech) 

主　　题：CsPbBr_(3)quantum dots ligand modification stability efficiency white light-emitting diodes 

摘      要：All-inorganic CsPbBr_(3) perovskite quantum dots(QDs)have received great attention in white light emission because of their outstanding ***,their practical application is hindered by poor ***,we propose a simple strategy to synthesize excellent stability and efficient emission of CsPbBr_(3) QDs by using 2-hexyldecanoic acid(DA)as a ligand to replace the regular oleic acid(OA)*** to the strong binding energy between DA ligand and QDs,the modified QDs not only show a high photoluminescence quantum yield(PLQY)of 96%but also exhibit high stability against ethanol and *** warm white light-emitting diodes(WLEDs)are constructed by combining lig-and modified CsPbBr_(3) QDs with red AgInZnS QDs on blue emitting InGaN chips,exhibiting a color rendering index of 93,a power efficiency of 64.8 lm/W,a CIE coordinate of(0.44,0.42)and correlated color temperature value of 3018 *** ad-dition,WLEDs based on ligand modified CsPbBr_(3) QDs also exhibit better thermal performance than that of WLEDs based on the regular CsPbBr_(3) *** combination of improved efficiency and better thermal stability with high color quality indicates that the modified CsPbBr_(3) QDs are ideal for WLEDs application.