1. Using ternary blend as a strategy to improve the driving force for charge transfer and facilitate electron transport in polymer solar cells
- Author
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Shiyu Feng, Xinjun Xu, Zhaozhao Bi, Guangwu Li, Zhishan Bo, Miao Li, Wei Ma, Xue Gong, and Heng Lu
- Subjects
Materials science ,Fullerene ,Energy conversion efficiency ,Charge (physics) ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Acceptor ,Electron transport chain ,Polymer solar cell ,0104 chemical sciences ,Electronic, Optical and Magnetic Materials ,Biomaterials ,Chemical engineering ,Materials Chemistry ,Electrical and Electronic Engineering ,0210 nano-technology ,Ternary operation ,Voltage - Abstract
The recently emerged non-fullerene small molecular acceptors can enhance the light absorption and increase the open-circuit voltage in polymer solar cells (PSCs); however, sometimes a decrease in the driving force for charge transfer from donor to acceptor is accompanied. Here, we reported a ternary blend strategy by utilizing fullerene derivative (PC71BM) as a third component to improve the driving force for charge transfer, the charge transport, and the film morphology. Accordingly, the ternary blend PSCs demonstrate a much enhanced power conversion efficiency (PCE) with an optimized value of 9.18% and a good fill factor (FF) of 63%. In comparison, the non-fullerene PSCs without the third component only show a PCE of 6.90% and an FF value of 56%.
- Published
- 2019