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Wang L, Miao Q, Wang D, Chen M, Bi H, Liu J, Kumar Baranwal A, Kapil G, Sanehira Y, Kitamura T, Ma T, Zhang Z, Shen Q, Hayase S. 14.31% Power Conversion Efficiency of Sn-Based Perovskite Solar Cells via Efficient Reduction of Sn 4. Angew Chem Int Ed Engl 2023:e202307228. [PMID: 37337312 DOI: 10.1002/anie.202307228] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 06/17/2023] [Accepted: 06/19/2023] [Indexed: 06/21/2023]
Abstract
The photoelectric properties of nontoxic Sn-based perovskite make it a promising alternative to toxic Pb-based perovskite. It has superior photovoltaic performance in comparison to other Pb-free counterparts. The facile oxidation of Sn2+ to Sn4+ presents a notable obstacle in the advancement of perovskite solar cells that utilize Sn, as it adversely affects their stability and performance. The study revealed the presence of a Sn4+ concentration on both the upper and lower surfaces of the perovskite layer. This discovery led to the adoption of a bi-interface optimization approach. A thin layer of Sn metal was inserted at the two surfaces of the perovskite layer. The implementation of this intervention yielded a significant decrease in the levels of Sn4+ and trap densities. The power conversion efficiency of the device was achieved at 14.31% through the optimization of carrier transportation. The device exhibited operational and long-term stability.
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Affiliation(s)
- Liang Wang
- The unversity of Electro-Communications, info-Powered Energy System Research Center, Tokyo, 1820035, Japan, 1820035, Tokyo, JAPAN
| | - Qingqing Miao
- Institute of Process Engineering Chinese Academy of Sciences, CAS key Laboratory of Green Process and Engineering, CHINA
| | - Dandan Wang
- The University of Electro-Communications, Faculty of Informatics and Engineering, JAPAN
| | - Mengmeng Chen
- The University of Electro-Communications, Faculty of Informatics and Engineering, JAPAN
| | - Huan Bi
- The University of Electro-Communications, Faculty of Informatics and Engineering, JAPAN
| | - Jiaqi Liu
- The University of Electro-Communications, info-Powered Energy System Research Center, JAPAN
| | - Ajay Kumar Baranwal
- The University of Electro-Communications, info-Powered Energy System Research Center, JAPAN
| | - Gaurav Kapil
- The University of Electro-Communications, info-Powered Energy System Research Center, JAPAN
| | - Yoshitaka Sanehira
- The University of Electro-Communications, info-Powered Energy System Research Center, JAPAN
| | - Takeshi Kitamura
- The University of Electro-Communications, Faculty of Informatics and Engineering, JAPAN
| | - Tingli Ma
- Kyushu Institute of Technology: Kyushu Kogyo Daigaku, Graduate School of Life Science and Systems Engineering, JAPAN
| | - Zheng Zhang
- The University of Electro-Communications, info-Powered Energy System Research Center, JAPAN
| | - Qing Shen
- The University of Electro-Communications, Faculty of Informatics and Engineering, JAPAN
| | - Shuzi Hayase
- The University of Electro-Communications, info-Powered Energy System Research Center, JAPAN
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