All-Inorganic Perovskite CsPb2Br5 Microsheets for Photodetector Application

Frontiers in Physics

Zhou, Dan¹  Zang, Zhigang²  Li, Shiqi²  Tang, Xiaosheng²  Han, Shuai²  Zu, Zhiqiang²  Hu, Wei²  Hu, Zhiping²  Du, Juan³ 

[1] Chongqing Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology, College of Mechanical and Electrical Engineering, Yangtze Normal University, China;Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, College of Optoelectronic Engineering, Chongqing University, China;State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, China

关键词: perovskites;    CsPb2Br5;    Microsheets;    Semiconductors;    photodetector;   

DOI  :  10.3389/fphy.2017.00069

学科分类：物理（综合）

来源: Frontiers

【 摘 要 】

Lead-halide perovskites have emerged as one kind of important optoelectronic materials with excellent performance in photovoltaic and light-emitting diode applications. Herein, we reported all-inorganic perovskite CsPb2Br5 microsheets prepared by a facile injection method. Through the X-ray diffraction (XRD) and Scanning Electron Microscope (SEM), it could be seen that the CsPb2Br5 microsheets showed single tetragonal crystalline phase and kept uniform square shape. Moreover, the as-synthesized CsPb2Br5 microsheets exhibited photoluminescence emission at 513 nm, and the UV–vis absorption spectrum further indicated the band gap of CsPb2Br5 microsheets was ≈ 2.50 eV. Additionally, the as-fabricated CsPb2Br5 microsheets based photodetector exhibited faster photoresponse characteristics of short rise time (0.71 s) and decay time (0.60 s), which demonstrated its promising application as high performance electronic and optoelectronic devices.

【 授权许可】

CC BY