Preparation of CsPbBr 3 Perovskite Solar Cells Using a Green Solvent

Jiajie Cheng, Jiahao Yan, Jiaming Wang, Yufan Jiang, Jie Xing, Hao Liu, Huiying Hao and Jingjing Dong ()
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Jiajie Cheng: School of Science, China University of Geosciences, Beijing 100083, China
Jiahao Yan: School of Integrated Circuits and Electronics, Beijing Institute of Technology, Beijing 100081, China
Jiaming Wang: School of Science, China University of Geosciences, Beijing 100083, China
Yufan Jiang: School of Science, China University of Geosciences, Beijing 100083, China
Jie Xing: School of Science, China University of Geosciences, Beijing 100083, China
Hao Liu: School of Science, China University of Geosciences, Beijing 100083, China
Huiying Hao: School of Science, China University of Geosciences, Beijing 100083, China
Jingjing Dong: School of Science, China University of Geosciences, Beijing 100083, China

Energies, 2023, vol. 16, issue 18, 1-12

Abstract: An increasing number of researchers are interested in studying CsPbBr 3 perovskite solar cells (PSCs) due to their high stability. However, the use of methanol during the spin-coating process is extremely hazardous, both to humans and the environment. CsBr is very soluble in water, but owing to its high specific heat capacity, water causes uneven crystallization and the creation of pores, which negatively impact the performance of CsPbBr 3 devices. In this paper, water is introduced as the solvent for CsBr in place of methanol to prepare CsPbBr 3 films and ethanol is used as the surface treatment solvent. The morphology and crystal quality of CsPbBr 3 films are improved by varying the concentration and spin-coating cycles of the CsBr/H 2 O solution and adding ethanol post-treatment. The results show that high-quality CsPbBr 3 films with reduced grain boundaries and high phase-purity were obtained by spin-coating 100 mg/mL CsBr/H 2 O solution three times and using ethanol as a post-treatment. The CsPbBr 3 solar cells yielded a maximum efficiency of 7.65% and demonstrate long-term stability over 1100 h.

Keywords: perovskite solar cells; CsPbBr 3; green solvent; post-treatment (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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