Synthesis of a carbazole-substituted diphenylethylene hole transporting material and application in perovskite solar cells

9th Edition of the International SOLARIS Conference

Li, Juncong^1^2 ; Zhu, Hongwei^1^2 ; Li, Xianggao^1^2 ; Wang, Shirong^1^2 ; Xiao, Yin^1^2

Fine Chemicals Department, School of Chemical Engineering and Technology, Tianjin University, 92 Weijin Rd., Nankai Dist., Tianjin

300072, China^1

Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), 92 Weijin Rd., Nankai Dist., Tianjin

300072, China^2

关键词: carbazole;    Highest occupied molecular orbital;    Hole-transporting materials;    Mesoporous structures;    Photo-electric conversion efficiency;    undoped;    UV-VIS absorption spectra;    Weight loss temperatures;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/556/1/012022/pdf
DOI  :  10.1088/1757-899X/556/1/012022

来源: IOP

【 摘 要 】

In this work, a carbazole-substituted stilbene derivatives hole transporting material, 9,9'-(ethene-1,1-diylbis(4,1-phenylene))bis(3,6-dimethoxy-9H-carbazole) (EPC) was designed and synthesized. The structure was characterized by FT-IR spectroscopy, 1H NMR, 13C NMR and MS. The glass transition temperature is 95.09°C and the 5% weight loss temperature is 423.37°C by DSC/TG analysis. Through the UV-Vis absorption spectrum combined with cyclic voltammetry, the energy level of the highest occupied molecular orbital (HOMO) of EPC and the lowest unoccupied orbital (LUMO) energy level were obtained (-5.38 eV, -2.19 eV). The energy level is well matched with methylamine lead iodine crystals. A mesoporous structure perovskite solar cell was fabricated based on the undoped EPC, and photoelectric conversion efficiency of 13.11% was obtained. After 600 hours of storage in a dark environment at 25°C and 60% relative humidity, 82% of the initial efficiency was obtained. This work provides new ideas for the development of undoped hole transporting materials.