Citation: Wen-Jing HOU, Yu-Ting MA, Gao-Yi HAN. Secondary Crystallization and Passivation of Perovskite Film Induced by Dithizone Post-treatment[J]. Chinese Journal of Inorganic Chemistry, ;2021, 37(8): 1414-1420. doi: 10.11862/CJIC.2021.182 shu

Secondary Crystallization and Passivation of Perovskite Film Induced by Dithizone Post-treatment

Institute of Molecular Science, Shanxi University, Taiyuan 030006, China

Corresponding author: Wen-Jing HOU, houwenjing@sxu.edu.cn Gao-Yi HAN, han_gaoyis@sxu.edu.cn
Received Date: 5 April 2021
Revised Date: 24 June 2021

Figures(8)

The low defect formation energy and surface dangling bonds of organic-inorganic hybrid perovskite can cause the formation of Pb defects in the film. Pb defects belong to the deep level defects, which can reduce the device performances by acting as the charge trap sites to accelerate the non-radiative recombination of carriers, and resulting in poor interface contact and carrier transmission performance. Therefore, passivating the Pb defects in perovskite film is necessary. In this study, dithizone was used as the secondary crystallization inducer and Pb defect passivator of the organic-inorganic hybrid perovskite film. After post-treating the perovskite film with dithizone, the size of the perovskite grains and the film morphology were regulated. Further research results show that dithizone can passivate the Pb defects effectively by coordinating with lead ions, induce secondary crystallization of perovskite crystals, improve the quality of the film, and thus enhancing the device efficiency and stability.
- dithizone,
- post-treatment,
- passivate,
- Pb defects,
- perovskite solar cells
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