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- Title
Improving the Efficiency of Organic Solar Cells with Methionine as Electron Transport Layer.
- Authors
Xu, Yujie; Zhou, Hang; Duan, Pengyi; Shan, Baojie; Xu, Wenjing; Wang, Jian; Liu, Mei; Zhang, Fujun; Sun, Qianqian
- Abstract
Interface modification is an important way to get better performance from organic solar cells (OSCs). A natural biomolecular material methionine was successfully applied as the electron transport layer (ETL) to the inverted OSCs in this work. A series of optical, morphological, and electrical characterizations of thin films and devices were used to analyze the surface modification effects of methionine on zinc oxide (ZnO). The analysis results show that the surface modification of ZnO with methionine can cause significantly reduced surface defects for ZnO, optimized surface morphology of ZnO, improved compatibility between ETL and the active layer, better-matched energy levels between ETL and the acceptor, reduced interface resistance, reduced charge recombination, and enhanced charge transport and collection. The power conversion efficiency (PCE) of OSCs based on PM6:BTP-ec9 was improved to 15.34% from 14.25% by modifying ZnO with methionine. This work shows the great application potential of natural biomolecule methionine in OSCs.
- Subjects
METHIONINE; SOLAR cell efficiency; ELECTRON transport; THIN film devices; SOLAR cells; SURFACE defects; PHOTOVOLTAIC power systems
- Publication
Molecules, 2022, Vol 27, Issue 19, p6363
- ISSN
1420-3049
- Publication type
Article
- DOI
10.3390/molecules27196363