Molecular Optimization Enables over 13% Efficiency in Organic Solar Cells
Wenchao ZhaoState Key Laboratory of Polymer Physics and ChemistrySunsun LiUniversity of Chinese Academy of SciencesHuifeng YaoBeijing
National Laboratory for Molecular Sciences, State Key Laboratory of
Polymer Physics and Chemistry, CAS Research/Education Center for Excellence
in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, ChinaShaoqing ZhangState Key Laboratory of Polymer Physics and ChemistryYun ZhangState Key Laboratory of Polymer Physics and ChemistryBei YangUniversity of Chinese Academy of Sciences, Beijing 100049, ChinaJianhui HouUniversity of Chinese Academy of Sciences
2017en
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Annotatsiya
A new polymer donor (PBDB-T-SF) and a new small molecule acceptor (IT-4F) for fullerene-free organic solar cells (OSCs) were designed and synthesized. The influences of fluorination on the absorption spectra, molecular energy levels, and charge mobilities of the donor and acceptor were systematically studied. The PBDB-T-SF:IT-4F-based OSC device showed a record high efficiency of 13.1%, and an efficiency of over 12% can be obtained with a thickness of 100-200 nm, suggesting the promise of fullerene-free OSCs in practical applications.
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