Morphology Optimization for High-performance Ternary Organic Solar Cells Using Non-halogenated Solvent
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초록
내용
Ternary organic solar cell (OSC) is one of the effective strategies to improve a power conversion efficiency (PCE). Especially, selecting a third component, which has complementary absorption spectra with a host blend is significantly important to absorb light effectively in various wavelength. However, despite the potential of ternary OSCs, it is not widely used for OSCs because most device has been shown to reduce fill factor (FF). Therefore, using the third component that maintains the film morphology and forms homogeneous phases with host blend is essential. In addition, most of OSCs were processed in halogenated solvents, which can have an environmental problem. Here, ternary OSCs composed of a PBTPBD75, a IT-4F and a PC71BM were fabricated using non-halogenated solvent, o-xylene. The fabricated ternary OSCs showed improved photovoltaic performance compared to the binary OSCs.