Journal
POLYMERS
Volume 14, Issue 18, Pages -Publisher
MDPI
DOI: 10.3390/polym14183835
Keywords
organic photovoltaics; all-polymer solar cells; power conversion efficiency; electron transport layer
Categories
Funding
- Guangdong Basic and Applied Basic Research Foundation [2021A1515110017]
- Natural Science Foundation of Top Talent of SZTU [20200206]
- Project of Education Commission of Guangdong Province of China [2021KQNCX080]
- Education Department of Guangdong Province [2021KCXTD045]
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This study improves the efficiency and fill factor of all-polymer solar cells through interfacial layer engineering, providing better potential for large-scale production of organic solar cells.
All-polymer solar cells (all-PSCs) are organic solar cells in which both the electron donor and the acceptor are polymers and are considered more promising in large-scale production. Thanks to the polymerizing small molecule acceptor strategy, the power conversion efficiency of all-PSCs has ushered in a leap in recent years. However, due to the electrical properties of polymerized small-molecule acceptors (PSMAs), the FF of the devices is generally not high. The typical electron transport material widely used in these devices is PNDIT-F3N, and it is a common strategy to improve the device fill factor (FF) through interface engineering. This work improves the efficiency of all-polymer solar cells through interfacial layer engineering. Using PDINN as the electron transport layer, we boost the FF of the devices from 69.21% to 72.05% and the power conversion efficiency (PCE) from 15.47% to 16.41%. This is the highest efficiency for a PY-IT-based binary all-polymer solar cell. This improvement is demonstrated in different all-polymer material systems.
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