Reinforced SnO2 tensile‐strength and “buffer‐spring” interfaces for efficient inorganic perovskite solar cells
Yuanyuan Zhao,
Lei Gao,
Qiurui Wang,
Qiang Zhang,
Xiya Yang,
Jingwei Zhu,
Hao Huang,
Jialong Duan,
Qunwei Tang
Affiliations
Yuanyuan Zhao
College of Mechanical and Electronic Engineering Shandong University of Science and Technology Qingdao China
Lei Gao
College of Mechanical and Electronic Engineering Shandong University of Science and Technology Qingdao China
Qiurui Wang
College of Mechanical and Electronic Engineering Shandong University of Science and Technology Qingdao China
Qiang Zhang
College of Mechanical and Electronic Engineering Shandong University of Science and Technology Qingdao China
Xiya Yang
Institute of New Energy Technology, College of Information Science and Technology Jinan University Guangzhou China
Jingwei Zhu
College of Materials Science and Engineering Sichuan University Chengdu China
Hao Huang
Guangxi Key Laboratory of Processing for Non‐Ferrous Metals and Featured Materials School of Resources, Environment and Materials, Guangxi University Nanning China
Jialong Duan
Institute of Carbon Neutrality, College of Chemical and Biological Engineering Shandong University of Science and Technology Qingdao China
Qunwei Tang
Institute of Carbon Neutrality, College of Chemical and Biological Engineering Shandong University of Science and Technology Qingdao China
Abstract Suppressing nonradiative recombination and releasing residual strain are prerequisites to improving the efficiency and stability of perovskite solar cells (PSCs). Here, long‐chain polyacrylic acid (PAA) is used to reinforce SnO2 film and passivate SnO2 defects, forming a structure similar to “reinforced concrete” with high tensile strength and fewer microcracks. Simultaneously, PAA is also introduced to the SnO2/perovskite interface as a “buffer spring” to release residual strain, which also acts as a “dual‐side passivation interlayer” to passivate the oxygen vacancies of SnO2 and Pb dangling bonds in halide perovskites. As a result, the best inorganic CsPbBr3 PSC achieves a champion power conversion efficiency of 10.83% with an ultrahigh open‐circuit voltage of 1.674 V. The unencapsulated PSC shows excellent stability under 80% relative humidity and 80°C over 120 days.
