Enhancement and recovery of photoluminescence and stability by multifunctional etching ligands treatment for perovskite nanocrystals

作     者：Yang Zhao Haipeng Zeng Xueqing Cai Yingshan Zhou Yangming Jiang Xin Zheng Lin Li Shujing Zhang Long Luo Weixi Li Xiaoru Zhang Ranran Liu Wenxi Liang Rui Guo Xiong Li Yang Zhao;Haipeng Zeng;Xueqing Cai;Yingshan Zhou;Yangming Jiang;Xin Zheng;Lin Li;Shujing Zhang;Long Luo;Weixi Li;Xiaoru Zhang;Ranran Liu;Wenxi Liang;Rui Guo;Xiong Li

作者机构：Michael Gratzel Center for Mesoscopic Solar CellsWuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan 430074HubeiChina State Key Laboratory of New Textile Materials and Advanced Processing TechnologiesWuhan Textile UniversityWuhan 430073HubeiChina State Key Laboratory of Functions and Applications of Medicinal Plants Guizhou Medical UniversityGuiyang 550014GuizhouChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2023年第76卷第1期

页      面：495-502,I0013页

核心收录：

学科分类：0820[工学-石油与天然气工程] 0817[工学-化学工程与技术] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 

基　　金：financial from the National Natural Science Foundation of China(22279039 and 20181194) the Chinese National 1000-Talent-Plan program the Innovation Project of Optics Valley Laboratory(OVL2021BG008) the Frontier of the Application Foundation of Wuhan Science and Technology Plan Project(2020010601012202) the Foundation of State Key Laboratory of New Textile Materials and Advanced Processing Technologies(FZ2021011) 

主　　题：Perovskite nanocrystals Synergistic effect Emission recovery White light emitting diodes Stability 

摘      要：Perovskite nanocrystals(PNCs)have recently become promising optoelectronic materials due to their excellent photophysical ***,the highly dynamic binding state between ligands and the surface of PNCs has severely restricted their luminescent properties and *** this work,1,3-bisbenzyl-2-oxoimidazolidine-4,5-dicarboxylic acid(cycle acid,CA)is introduced as both an etchant and a ligand upon post-synthetic surface treatment of *** removing the imperfect octahedrons[Pb X_(6)]^(4-)and passivating the surface defects synergistically,this treatment improves photoluminescence quantum yields from 76%to 95%and enhances the stability of PNCs against polar solvent,moisture,heat,and ***,CA can effectively and instantly recover the luminescence emission for aged *** a result,the CA-Cs Pb Br_(3)PNCs and CA-Cs Pb IxBr_(3-x)PNCs are applied as color-converting layers on a blue LED chip for warm white light-emitting diodes(WLEDs)with a color coordinate of(0.41,0.40).Importantly,the CA-based WLED device exhibits superior stability in operational conditions.