Photonics Research, 2020, 8 (10): 10000A39, Published Online: Sep. 18, 2020  

Two-step solvent post-treatment on PTAA for highly efficient and stable inverted perovskite solar cells Download: 838次

Author Affiliations
1 Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Macao SAR, 999078, China
2 Guangdong Key Laboratory of Nano-Micro Material Research, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University, Shenzhen 518055, China
3 Department of Physics and Chemistry, Faculty of Science and Technology, University of Macau, Macao SAR, 999078, China
4 e-mail: gcxing@um.edu.mo
5 e-mail: huipan@um.edu.mo
Abstract

Modifying the surface of poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) with toluene during the high-speed spin-coating process of dimethylformamide considerably improves the wettability and morphology of PTAA and results in improvement of the crystallinity and absorption of perovskite film. The hole mobility and ohm contact have also been improved accordingly. Combined with these improved parameters, inverted perovskite solar cells with high efficiency of 19.13% and long-term stability could be achieved, which are much better than those with untreated PTAA. Importantly, our devices can keep 88.4% of the initial power conversion efficiency after 30 days of storage in ambient air.

Yang Li, Chao Liang, Gaopeng Wang, Jielei Li, Shi Chen, Shihe Yang, Guichuan Xing, Hui Pan. Two-step solvent post-treatment on PTAA for highly efficient and stable inverted perovskite solar cells[J]. Photonics Research, 2020, 8(10): 10000A39.

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