20.6% Efficiency Organic Solar Cells Enabled by Incorporating a Lower Bandgap Guest Nonfullerene Acceptor Without Open‐Circuit Voltage Loss
Chinese Academy of Sciences · Beijing National Laboratory for Molecular Sciences · +7 more institutions
Abstract
Abstract Simultaneously mitigating both photovoltage and photocurrent losses is crucial for organic solar cells (OSCs) to approach the Shockley–Queisser limit of ideal efficiency. Incorporating a narrower bandgap nonfullerene acceptor (NFA) as a guest component into the host donor:NFA system broadens the absorption spectrum. However, this can also increase the nonradiative decay rate according to the energy‐gap law. In this work, ternary OSCs are constructed by combining a narrow bandgap AQx‐2F (as host NFA) with a lower bandgap eC9 (as guest NFA), significantly enhancing photocurrent generation without compromising photovoltage. The addition of eC9 acts as a crystallization inducer, extending the…
Citation impact
- FWCI
- 71.70
- Percentile
- 100%
- References
- 70
Authors
14- YJYuanyuan Jiang
Chinese Academy of Sciences, Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, University of Chinese Academy of Sciences
- KLKerui Liu
Chinese Academy of Sciences, Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, University of Chinese Academy of Sciences
- FLFeng LiuCorresponding
Shanghai Jiao Tong University, Chinese Academy of Sciences, Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry
- GRGuangliu Ran
Beijing Normal University
- MWMengni Wang
National Center for Nanoscience and Technology
Topics & keywords
- Materials science
- Open-circuit voltage
- Organic solar cell
- Acceptor
- Band gap
- Optoelectronics
- Voltage
- Nanotechnology