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Li M, Yue Z, Ye Z, Li H, Luo H, Yang QD, Zhou Y, Huo Y, Cheng Y. Improving the Efficiency and Stability of MAPbI 3 Perovskite Solar Cells by Dipeptide Molecules. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2311400. [PMID: 38196055 DOI: 10.1002/smll.202311400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Revised: 12/29/2023] [Indexed: 01/11/2024]
Abstract
Passivating the electronic defects of metal halide perovskite is regarded as an effective way to improve the power conversion efficiency (PCE) of perovskite solar cells (PVSCs). Here, a series of dipeptide molecules with abundant ─C═O, ─O─ and ─NH functional groups as defects passivators for perovskite films are employed. These dipeptide molecules are utilized to treat the surface of prototype methyl ammonium lead iodide (MAPbI3) films and the corresponding PVSCs exhibit enhanced photovoltaic performance and ambient stability, which can be ascribed to: 1) the ─C═O and ─O─ can interact with the undercoordinated Pb2+ ions and the ─NH groups can form hydrogen bonds with the I- ions, passivating the defects in perovskite film and reducing charge recombination in PVSCs; 2) the long alkyl chain of dipeptide molecules increases the hydrophobicity of the perovskite surface and thus enhance the stability of PVSCs. The passivated MAPbI3-based PVSCs exhibit a champion PCE of 20.3% and retain 60% of the initial PCE after 1000 h. It is believed that the defects passivation engineering using polypeptide moleculars can be applied in other perovskite compositions for high device efficiency and stability.
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Affiliation(s)
- Mingya Li
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, Guangdong, 510006, P. R. China
| | - Ziyao Yue
- School of New Energy, Nanjing University of Science & technology, Jiangyin, Jiangsu, 210014, P. R. China
| | - Zecong Ye
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, Guangdong, 510006, P. R. China
| | - Huixue Li
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, Guangdong, 510006, P. R. China
| | - Huanting Luo
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, Guangdong, 510006, P. R. China
| | - Qing-Dan Yang
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, Guangdong, 510006, P. R. China
| | - Yecheng Zhou
- School of Materials Science & Engineering, Sun Yat-Sen University, Guangzhou, Guangdong, 510006, P. R. China
| | - Yanping Huo
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, Guangdong, 510006, P. R. China
| | - Yuanhang Cheng
- School of New Energy, Nanjing University of Science & technology, Jiangyin, Jiangsu, 210014, P. R. China
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