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Volume 14
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Article

Preparation of Highly Efficient and Stable All-Inorganic CsPbBr3 Perovskite Solar Cells Using Pre-Crystallization Multi-Step Spin-Coating Method

by
Yulong Zhang
1,†,
Zhaoyi Jiang
2,*,†,
Jincheng Li
1,
Guanxiong Meng
3,
Jiajun Guo
3,* and
Weijia Zhang
4,*
1
Department of Basic Courses, Officers College of PAP, Chengdu 610213, China
2
School of Applied Science, Taiyuan University of Science and Technology, Taiyuan 610213, China
3
Hangzhou Acme Optoelectronics Technology Co., Ltd., Hangzhou 310020, China
4
Center of Condensed Matter and Material Physics, School of Physics, Beihang University, Beijing 100191, China
*
Authors to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Coatings 2024, 14(7), 918; https://doi.org/10.3390/coatings14070918
Submission received: 3 July 2024 / Revised: 19 July 2024 / Accepted: 20 July 2024 / Published: 22 July 2024
(This article belongs to the Special Issue New Functional Coatings and Thin Films for Sensor and Green Energy Technologies)
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Abstract

All-inorganic CsPbBr3 perovskite solar cells have garnered extensive attention in the photovoltaic domain due to their remarkable environmental stability. Nevertheless, CsPbBr3 prepared using the conventional sequential deposition method suffers from issues such as inferior crystallinity, low phase purity, and poor film morphology. Herein, we propose a pre-crystallization methodology by introducing a minute quantity of CsBr into the PbBr2 precursor solution to generate a small amount of CsPb2Br5 crystals within the PbBr2 film, leading to a porous PbBr2 film with enhanced crystallinity. Under the influence of more pores and CsPb2Br5 crystals as nucleation sites for inducing growth, a CsPbBr3 film with a larger crystal size, lower grain boundary density, stronger crystallinity, and higher phase purity is formed. Compared with untreated devices, photovoltaic devices prepared using the pre-crystallization method achieved a champion photovoltaic conversion efficiency (PCE) of 8.62%. Furthermore, pre-crystallized devices demonstrate higher stability than untreated ones and can still retain 94% of the original PCE after being exposed to air for 1000 h without encapsulating.
Keywords: perovskite solar cells; sequential deposition; CsPbBr3; highly efficient and stability; porous PbBr2 perovskite solar cells; sequential deposition; CsPbBr3; highly efficient and stability; porous PbBr2

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MDPI and ACS Style

Zhang, Y.; Jiang, Z.; Li, J.; Meng, G.; Guo, J.; Zhang, W. Preparation of Highly Efficient and Stable All-Inorganic CsPbBr3 Perovskite Solar Cells Using Pre-Crystallization Multi-Step Spin-Coating Method. Coatings 2024, 14, 918. https://doi.org/10.3390/coatings14070918

AMA Style

Zhang Y, Jiang Z, Li J, Meng G, Guo J, Zhang W. Preparation of Highly Efficient and Stable All-Inorganic CsPbBr3 Perovskite Solar Cells Using Pre-Crystallization Multi-Step Spin-Coating Method. Coatings. 2024; 14(7):918. https://doi.org/10.3390/coatings14070918

Chicago/Turabian Style

Zhang, Yulong, Zhaoyi Jiang, Jincheng Li, Guanxiong Meng, Jiajun Guo, and Weijia Zhang. 2024. "Preparation of Highly Efficient and Stable All-Inorganic CsPbBr3 Perovskite Solar Cells Using Pre-Crystallization Multi-Step Spin-Coating Method" Coatings 14, no. 7: 918. https://doi.org/10.3390/coatings14070918

APA Style

Zhang, Y., Jiang, Z., Li, J., Meng, G., Guo, J., & Zhang, W. (2024). Preparation of Highly Efficient and Stable All-Inorganic CsPbBr3 Perovskite Solar Cells Using Pre-Crystallization Multi-Step Spin-Coating Method. Coatings, 14(7), 918. https://doi.org/10.3390/coatings14070918

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