文献类型：期刊文献

英文题名：Circularly polarized perovskite luminescence with dissymmetry factor up to 1.9 by soft helix bilayer device

作者：Liu, Shuaijun[1,2];Liu, Xuan[3];Wu, Yongzhen[1,2];Zhang, Diwei[1,2];Wu, Yue[4];Tian, He[1,2];Zheng, Zhigang[3];Zhu, Wei -Hong[1,2]

机构：[1]East China Univ Sci & Technol, Inst Fine Chem, Feringa Nobel Prize Scientist Joint Res Ctr, Frontiers Sci Ctr Materiobiol & Dynam Chem,Sch Che, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China;[4]Shenzhen Univ, Inst Low Dimens Mat Genome Initiat, Coll Chem & Environm Engn, Shenzhen 518071, Peoples R China

年份：2022

卷号：5

期号：7

起止页码：2319

外文期刊名：MATTER

收录：;EI(收录号：20222712317632);WOS:【SCI-EXPANDED(收录号:WOS:000829643600005)】；

基金：This work was supported by the National Natural Science Foundation of China (21788102, 22179037, 61822504, 51873060, and 62035008), Innovation Program of Shanghai Municipal Education Commission, Scientific Committee of Shanghai (15XD1501400 and 2021-01-07-00-02-E00107), Shanghai Municipal Science and Technology Major Project (2018SHZDZX03 and 21JC1401700), Program of Introducing Talents of Discipline to Universities (B16017), "Shuguang Program'' of Shanghai Education Development Foundation and Shanghai Municipal Education Commission (21SG29), and the Fundamental Research Funds for the Central Universities. Additional support was provided by the Feringa Nobel Prize Scientist Joint Research Center.

语种：英文

外文关键词：Circular polarization - Efficiency - Liquid crystals - Luminescence - Metal halides - Scaffolds

摘要：Metal halide perovskites are exceptional light-emitting materials. Endowing perovskites with circularly polarized luminescence (CPL) offers great promise for innovative applications, but the existing strategies are inefficient in acquiring large dissymmetry factor (g(lum)), high quantum efficiency, and long-term stability. Here, we demonstrate bright and stable CPL with a glum value up to 1.9 from perovskites in chiral liquid crystal (LC)-based soft helix devices featuring a bilayer architecture. The incorporation of an optimized polymer of polyacrylonitrile (PAN) in the bilayer device remarkably improves luminescent efficiency and stability of perovskite, while perfectly preserving optical and stimuli-responsive characteristics of chiral LCs. The resulting bilayer devices allow systematical composition engineering of both perovskite and soft helix and enable full-color CPL with high g(lum) values. Moreover, CPL-active devices with diverse graphical patterns and reversible thermal -switching behavior can further expand the scaffold for cryptology and anti-counterfeiting applications.