Perylene diimide-thienylenevinylene-based small molecule and polymer acceptors for solution-processed fullerene-free organic solar cells
- Dai, Shuixing
- Lin, Yuze
- Cheng, Pei
- Wang, Yifan
- Zhao, Xingang
- Ling, Qidan
- Zhan, Xiaowei
DOIAbstract
A small molecule and a polymer based on perylene diimide and thienylenevinylene were designed and synthesized. Both small molecule and polymer exhibited excellent thermal stability with decomposition temperatures of >400 degrees C and strong absorption in the visible region (300-800 nm). These two compounds showed highest occupied molecular orbital levels of -5.57 and -5.70 eV and lowest unoccupied molecular orbital levels of -3.72 and -3.67 eV, respectively. Solution processed fullerene-free polymer solar cells based on the small molecule acceptor and the polymer acceptor afforded power conversion efficiencies of up to 0.69% and 1.00%, respectively. Comparative studies of the absorption, energy levels, charge transport, morphology and p...
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