Chemical Research in Chinese Universities ›› 2023, Vol. 39 ›› Issue (4): 654-659.doi: 10.1007/s40242-023-3086-1

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Tuning Photodetection Band of MAPbX3(X=Cl/Br/I) Perovskite Single Crystals by Sub-nano Carbon Dot Doping

ZHU Xia1, AN Jiakun1, CHEN Gaoyu1, XING Chenyu1, BAO Jianchun1, XU Xiangxing1,2   

  1. 1. School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, P.R. China;
    2. State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P.R. China
  • Received:2023-04-04 Online:2023-08-01 Published:2023-07-18
  • Contact: BAO Jianchun, XU Xiangxing E-mail:baojianchun@njnu.edu.cn;xuxx@njnu.edu.cn
  • Supported by:
    This work was supported by the the National Natural Science Foundation of China (No.22175095).

Abstract: Perovskite single crystals are prominent semiconductor materials due to their high carrier mobility, long carrier diffusion length, and large absorption coefficient. They can be used as optoelectronic functional materials for narrowband or broadband photodetectors. In this report, the photodetection band tunability was achieved by doping MAPbX3(MA=methylammonium, X=Cl/Br/I) perovskite single crystals with sub-nano carbon dots (MAPbX3-C). The sub-nano size and good dispersibility of the carbon dots ensured controllable doping. The absorption of the sub-nano carbon dots and trap states in the MAPbX3-C single crystals resulted in the special responsivity spectrum features.

Key words: Sub-nano, Carbon dot, Perovskite, Single crystal, Photodetector