Micelle‐Induced Nucleation and Surface Chemical Polishing Co‐Strategy for Efficient Tin‐Lead Mixed Perovskite Solar Cells
Abstract
Abstract Tin‐lead mixed perovskite (TLP) solar cells, due to their tunable bandgap, have emerged as one of the most promising candidates for approaching the Shockley–Queisser limit. However, the strong Lewis acidity of the tin‐halide component in TLP increases the propensity for defect formation and phase separation during the fabrication process. In this study, a bimolecular synergistic regulation approach that combines micelle‐induced nucleation and surface chemical polishing for crystallization control and defect passivation in TLP solar cells is introduced. The TLP precursor micelle‐induced nucleation strategy modifies the characteristic of the micelles through hydrogen‐bonding and selective coordination with 4‐hydrazinylbenzonitrile hydrochloride (HBN), thereby lowering the critical nucleation concentration and accelerating the uniform and simultaneous nucleation of the perovskite. This crystallization control strategy significantly enhances the quality of TLP films and suppresses defect introduction during the uncontrollable film formation process. The surface chemical polishing strategy entails the passivation of TLP interface defects with hydrazine‐based phenylsulfonamide hydrochloride (HSA), inhibiting the oxidation of divalent tin and optimizing charge carrier extraction at the interface. Ultimately, a TLP solar cell with a power conversion efficiency of 24.01% is achieved, and the encapsulated device exhibits an T80 value of 391 h under prolonged illumination.
Article Details
Authors (14)
Dong He
School of Biomedical Sciences and Engineering, South China University of Technology, Guangzhou International Campus
Zixin Zeng
Gongcheng Zhou
School of Materials and Energy Yunnan University Kunming Yunnan 650091 China
Zhaoning Li
Department of Materials Science and Engineering Shenzhen Key Laboratory of Full Spectral Solar Electricity Generation (FSSEG) Southern University of Science and Technology (SUSTech) No. 1088 Xueyuan Rd. Shenzhen Guangdong 518055 China
Tianle Cheng
Guoqiang Guo
Department of Materials Science and Engineering Shenzhen Key Laboratory of Full Spectral Solar Electricity Generation (FSSEG) Southern University of Science and Technology (SUSTech) No. 1088 Xueyuan Rd. Shenzhen Guangdong 518055 China
Haojie Chen
Rui Xia
Chuanxin Chen
Department of Materials Science and Engineering Shenzhen Key Laboratory of Full Spectral Solar Electricity Generation (FSSEG) Southern University of Science and Technology (SUSTech) No. 1088 Xueyuan Rd. Shenzhen Guangdong 518055 China
Jiacheng He
College of Chemistry and Chemical Engineering/Film Energy Chemistry for Jiangxi Provincial Key Laboratory (FEC), Nanchang University, Nanchang, China.
Sai‐ Wing Tsang
Department of Materials Science and Engineering City University of Hong Kong Kowloon Hong Kong SAR 999077 China
Wenhua Zhang
Alex K.‐Y. Jen
Department of Materials Science and Engineering City University of Hong Kong Kowloon Hong Kong SAR
Zhubing He
Department of Materials Science and Engineering Shenzhen Key Laboratory of Full Spectral Solar Electricity Generation (FSSEG) Southern University of Science and Technology (SUSTech) No. 1088 Xueyuan Rd. Shenzhen Guangdong 518055 China