Regenerative Redox Cycling Enables Stable Tin Perovskite Photovoltaics
Abstract
Abstract Tin halide perovskites (THPs) suffer from low stability due to the easy oxidation of Sn (II). Although traditional reduction strategies effectively inhibit the oxidation of Sn (II), the gradual depletion of reducing agents during continuous device operation significantly weakens their antioxidative capacity, thereby limiting the long‐term stability of the device. Herein, a regenerative redox cycling strategy utilizing 4‐mercaptobenzoic acid (4‐MBA) is proposed. Under operational conditions, UV irradiation enables 4‐MBA regeneration, which concurrently drives continuous Sn (IV)‐to‐Sn (II) reduction and facilitates dual‐site defect passivation, significantly enhancing device efficiency and stability. Ultimately, an excellent efficiency of 15.15% is achieved and maintained 100% of the initial efficiency for 1100 h in a simulated day–night cycle maximum power point tracking (MPPT) test. This work provides a sustainable reduction strategy that effectively addresses the long‐term stability issue of tin perovskite photovoltaic cells.
Article Details
Authors (10)
Kai Jin
Yu‐Tong Yang
Institute of Functional Nano & Soft Materials (FUNSOM) State Key Laboratory of Bioinspired Interfacial Materials Science Soochow University Suzhou China
Yu Xia
Xiao‐Yu Rong
State Key Laboratory of Bioinspired Interfacial Materials Science Institute of Functional Nano & Soft Materials (FUNSOM) Soochow University Suzhou 215123 China
Xin Chen
Lei Huang
BLSA-ZJU Research Center and Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China.
Chun‐Hao Chen
Institute of Functional Nano & Soft Materials (FUNSOM) State Key Laboratory of Bioinspired Interfacial Materials Science Soochow University Suzhou China
Jing Chen
Kai‐Li Wang
Institute of Functional Nano & Soft Materials (FUNSOM) State Key Laboratory of Bioinspired Interfacial Materials Science Soochow University Suzhou China
Zhao‐Kui Wang
Institute of Functional Nano & Soft Materials (FUNSOM) State Key Laboratory of Bioinspired Interfacial Materials Science Soochow University Suzhou China