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Citation: Zeyuan WANG, Songzhi ZHENG, Hao LI, Jingbo WENG, Wei WANG, Yang WANG, Weihai SUN. Effect of I2 interface modification engineering on the performance of all-inorganic CsPbBr3 perovskite solar cells[J]. Chinese Journal of Inorganic Chemistry, ;2024, 40(7): 1290-1300. doi: 10.11862/CJIC.20240021 shu

Effect of I2 interface modification engineering on the performance of all-inorganic CsPbBr3 perovskite solar cells

  • Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Fujian Key Laboratory of Photoelectric Functional Materials, Institute of Materials Physical Chemistry, School of Materials Science and Engineering, Huaqiao University, Xiamen, Fujian 361021, China

  • Corresponding author: Weihai SUN, sunweihai@hqu.edu.cn
  • Received Date: 17 January 2024
    Revised Date: 1 May 2024

Figures(8)

  • The CsPbBr3 absorber layer made from CsBr aqueous solution was modified by spin-coating I2 isopropa- nol solution, which the surface defects of the CsPbBr3 layer were passivated, and the CsPbBr3 film with better mor- phology was obtained. The solar cells were optimized by exploring different spin-coating concentrations of CsBr methanol solution, and when 5 mg·mL-1 I2 isopropanol solution was used for interface modification, the perovskite film was significantly improved in morphology from the result of X-ray diffraction, scanning electron microscope and had the best optoelectronic performance. As a consequence, CsPbBr3-based perovskite solar cells (PSCs) with 5 mg· mL-1I2 isopropanol solution can reach the best open-circuit voltage (VOC), short circuit current density (JSC), fill factor (FF) of 1.55 V, 7.45 mA·cm-2, 85.54%, respectively, and the ultimate photoelectric conversion efficiency (PCE) attained 9.88%.
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