Chlorine-substituted chiral 2D perovskite microwires with enhanced lattice rigidity for sensitive circularly polarized light detection  

作　　者：Meng Yuan Yuchen Qiu Yingjie Zhao Yuyan Zhao Hui Li Xiao Wei Gaosong Chen Jiangang Feng Hanfei Gao Jinjin Zhao Jiahui Zhao Lei Jiang Yuchen Wu 

机构地区：[1]Key Laboratory of Bio-inspired Materials and Interfacial Science,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China [2]College of Chemistry,Zhengzhou University,Zhengzhou 450001,China [3]College of Chemistry,Jilin University,Changchun 130012,China [4]Key Laboratory for Special Functional Materials of Ministry of Education,National and Local Joint Engineering Research Center for High-Efficiency Display and Lighting Technology,Collaborative Innovation Center of Nano Functional Materials and Applications,Henan University,Kaifeng 475004,China [5]University of Chinese Academy of Sciences(UCAS),Beijing 100049,China [6]Department of Electrical and Computer Engineering,National University of Singapore,Singapore 117585,Singapore [7]Suzhou Institute for Advanced Research,University of Science and Technology of China,Suzhou 215123,China [8]Ji Hua Laboratory,Foshan 528000,China [9]Department of Physics,Shanxi Datong University,Datong 037009,China

出　　处：《Science China Chemistry》2023年第12期3602-3610,共9页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China (21988102, 52173190, and 52303257);the Ministry of Science and Technology of China (2018YFA0704803 and 2018YFA0208502);Youth Innovation Promotion Association CAS (2018034);Shanxi Province Science Foundation for Youths (202203021222297);project funded by China Postdoctoral Science Foundation (2023TQ0300 and 2022M721331)。

摘　　要：Chiral two-dimensional(2D) perovskites offer numerous attractive features for optoelectronics owing to their soft, deformable lattices and a high degree of chemical tunability. While tremendous advances have been made in perovskite-based direct circularly polarized light(CPL) detection, the low circular polarization anisotropy factor and sensitivity of those photodetectors arising from large lattice distortion still limit practical applications. Herein, chiral 2D perovskite-based single-crystalline microwire arrays with enhanced circular dichroism(CD) absorption are fabricated with the synergy of the capillary-bridgeconfined assembly method and chlorine-substituted phenethylamine(Cl-MBA). Compared with phenethylamine(MBA)-inserted perovskites, the smaller lattice distortion and increased halogen–halogen interaction within Cl–MBA-inserted perovskites strengthen lattice rigidity and weaken electron–phonon coupling to improve carrier transport and thermal stability, resulting in high-performance CPL photodetectors with an anisotropy factor of 0.25, responsivity exceeding 95.7±9.3 A W^(-1)and detectivity exceeding(3.05±0.30)×10^(13)Jones. This work opens a new perspective to modulate circular polarization sensitivity and will be helpful to realize promising implementations in quantum computation and communication.

关 键 词：chiral perovskites microwire arrays lattice rigidity circular polarization PHOTODETECTORS 

分 类 号：TB34[一般工业技术—材料科学与工程]