Dimethyl Sulfoxide Mixed-Solvent Engineering for Efficient Perovskite/Silicon Tandem Solar Cell

Haifeng Zhang, Youling He, Qian Li, Hao Zhang, Yinqing Sun, Tengteng Yang, Yinyi Ma, Tian Yang, Xindi Zheng and Lin Mao ()
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Haifeng Zhang: School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China
Youling He: School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China
Qian Li: School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China
Hao Zhang: School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China
Yinqing Sun: School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China
Tengteng Yang: School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China
Yinyi Ma: School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China
Tian Yang: Sichuan Research Center of New Materials, National Energy Novel Materials Center, Institute of Chemical Materials, China Academy of Engineering Physics, Chengdu 610200, China
Xindi Zheng: School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China
Lin Mao: School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China

Energies, 2024, vol. 18, issue 1, 1-11

Abstract: The integration of perovskite with silicon for constructing tandem solar cells (TSCs) represents a promising route in photovoltaic technology. The hybrid sequential deposition (HSD) method, combining thermal evaporation and spin-coating, is crucial for developing perovskite films in textured perovskite/silicon tandem solar cells. However, the process faces challenges due to incomplete reactions caused by the dense perovskite coverage layer (CPCL) formed from high-crystallinity precursors. The CPCL hinders the diffusion of organic salts into the bottom precursor layer, leading to performance degradation and accelerated device aging. Herein, this study explores several polar solvents as additives to n-butanol (nBA) solvent in order to enhance the permeability of organic salts through the CPCL, and we demonstrate that dimethyl sulfoxide (DMSO) as an additive solvent can effectively assist organic salts in rapidly diffusing through the precursor layer, thereby promoting the complete transformation of uniform perovskite crystals. The resulting perovskite films exhibited complete conversion, uniform crystallization, and improved quality. As a result, the target TSCs achieved an increased maximum power conversion efficiency (PCE) of 29.12%. This study offers a robust pathway for depositing high-quality perovskite films on industrial-grade textured silicon substrates, laying a solid foundation for advancing perovskite/silicon tandem solar cells technology.

Keywords: hybrid sequential deposition; perovskite/silicon tandem solar cells; solvent engineering; fully textured silicon substrates (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: 2024
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