Chem. J. Chinese Universities ›› 2025, Vol. 46 ›› Issue (8): 20250018.doi: 10.7503/cjcu20250018

• Physical Chemistry • Previous Articles     Next Articles

Performance of CsPbI3 Perovskite Solar Cell Improved by Small Molecules of Triphenylamine Containing Pyridine Groups

LYU Haijun1, WANG Shenggang2, MA Jiazhuo2, HAO Yanzhong2()   

  1. 1.College of Chemical Engineering,Hebei University of Science and Technology,Shijiazhuang 050091,China
    2.College of Science,Hebei University of Science and Technology,Shijiazhuang 050091,China
  • Received:2025-01-17 Online:2025-08-10 Published:2025-05-06
  • Contact: HAO Yanzhong E-mail:yzhao@hebust.edu.cn
  • Supported by:
    the Natural Science Foundation of Hebei Province, China(B2022208001)

Abstract:

In this paper, two novel small-molecule triphenylamine derivatives NN-bis(4-methoxyphenyl)-4-(4- pyridyl) aniline(H432) and NN-bis(4-methoxyphenyl)-4-[4-(cyano)-3-pyridyl] aniline(H462), were synthesized by classic Suzuki-Miyaura and Ullmann coupling reactions. The small-molecule derivatives were deposited onto FTO/c-TiO2/m-TiO2/CsPbI3 composite films with crystal modification and surface post-treatment modification to fabricate CsPbI3 perovskite solar cells. The resulting devices were characterized and tested by SEM, J-V curves, and electrochemical impedance spectroscopy. The results show that the CsPbI3 perovskite solar cells prepared by surface post-treatment modification exhibits a significant increase in power conversion efficiency(PCE). Specifically, the PCE of CsPbI3 perovskite solar cells modified with 0.05 mol/L H432 increases from 12.44%(control device) to 15.54%, while the PCE of those modified with 0.05 mol/L H462 improves from 12.44% to 15.66%.

Key words: CsPbI3 perovskite solar cell, Small-molecule triphenylamine derivative, Interface modification, Power conversion efficiency

CLC Number: 

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