Predictably synthesizing a library of white-light-emitting perovskites

作     者：Ludan Niu Lili Zhao Deyu Li Qian Chen Mingming Zhang Jing Luan Lei Wang Weigao Xu Jun Xing 

作者机构：Key Laboratory of Eco-chemical EngineeringMinistry of EducationCollege of Chemistry and Molecular EngineeringQingdao University of Science&TechnologyQingdao 266042China Key Laboratory of Mesoscopic ChemistryMinistry of EducationSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China School of Materials Science and TechnologyQingdao University of Science&TechnologyQingdao 266042China Shandong Engineering Research Center for Marine Environment Corrosion and Safety ProtectionCollege of Environment and Safety EngineeringQingdao University of Science and TechnologyQingdao 266042China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2023年第66卷第3期

页      面：760-767页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：financial support from National Natural Science Foundation of China(21905154)and the Taishan Scholars Program.the Fundamental Research Funds for the Central Universities in China(020514380231 021014380177) the National Natural Science Foundation of China(22173044 21873048) the National Key R&D Program of China No.2020YFA0406104 “Innovation&Entrepreneurship Talents Plan”of Jiangsu Province 

主　　题：white-light emission halide perovskite steric hindrance two-dimensional 

摘      要：The low-dimensional organic-inorganic halide perovskites with self-trapped exciton emission have promising prospects for single-phase white-light emitters. However, so far, these broadband white-light-emitting(BWLE) perovskites were synthesized by trial-and-error testing spacing molecules. Here, we developed a steric hindrance regulation strategy to predictably synthesize BWLE perovskites. The molecules containing C–C(–NH_(2))–C groups were introduced into low-dimensional perovskites, which brings a large steric hindrance in-plane orientation. The bigger C–C(–NH_(2))–C bond angle would induce larger structural distortion in perovskites, which leads to the higher rate of self-trapping of excitons and the deeper self-trapping depth. The photoluminescence spectra of the synthesized perovskites can cover the cool-to-warm white light region. Overall, we fabricated a material library consisting of 40 kinds of BWLE compounds according to this strategy. Our findings develop a general strategy to synthesize BWLE perovskites and offer a material platform for optoelectronic applications.