Chem. J. Chinese Universities ›› 2026, Vol. 47 ›› Issue (3): 20250268.doi: 10.7503/cjcu20250268

• Physical Chemistry • Previous Articles     Next Articles

Small Molecular Triphenylamine Derivative with Thiophene Group as π Bridge and Cyanopyridine Group as Electron-withdrawing Group Improving the Performance of CsPbI3 Solar Cell

HAO Yanzhong1(), LYU Haijun2, LIU Jiahui1, WEI Xiaojia1, YE Xiaochan1   

  1. 1.College of Science,Hebei University of Science and Technology
    2.College of Chemical Engineering,Hebei University of Science and Technology,Shijiazhuang 050091,China
  • Received:2025-09-21 Online:2026-03-10 Published:2026-01-10
  • 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 D-π-A structured small molecular triphenylamine derivatives, NN-bis(4- methoxyph-enyl)-4-[5-(4-pyridyl)-2-thienyl] aniline(H457) and NN-bis(4-methoxyphenyl)-4-[2,3-dihydro-7-(4-pyridyl)thienyl] aniline(H459), were synthesized with classical reactions such as Stille coupling and Suzuki coupling. The small molecular derivatives were deposited onto FTO/c-TiO2/m-TiO2/CsPbI3 composite films by means of crystallization modification and surface post-treatment modification to fabricate CsPbI3 perovskite solar cells. The energy conversion efficiencies of various CsPbI3 perovskite solar cells were measured, and their characterization and mechanism were studied using scanning electron microscope(SEM), X-ray diffractometer(XRD), ultraviolet-visible spectroscopy(UV-Vis), current density voltage(J⁃V) curves, and electrochemical impedance spectroscopy. The results show that the energy conversion efficiency of the modified CsPbI3 perovskite solar cells has increased to 15.82%, and the stability and service life of the modified cell devices have also been improved.

Key words: Power conversion efficiency, D?π?A structure, Small molecular triphenylamine derivative, CsPbI3 perovskite solar cell

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