期刊
CHEMICAL COMMUNICATIONS
卷 56, 期 31, 页码 4340-4343出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9cc10076h
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资金
- National Natural Science Foundation of China (NSFC) [21875286]
- National Key Research & Development Projects of China [2017YFA0206600]
- Science Fund for Distinguished Young Scholars of Hunan Province [2017JJ1029]
Herein, a new Y-series non-fullerene acceptor, Y21, bearing an asymmetric electron-deficient-core (DA ' D) and fluorinated dicyanomethylene derivatives as flanking groups, was designed and synthesized for organic solar cell applications. Rather than being a perfect C-2 symmetric traditional Y-series acceptor, Y21 possesses an electron-withdrawing unit (A ') shifted from the center of DA ' D, turning into an asymmetric molecular geometry. Photovoltaic devices based on PM6:Y21 can realize a high J(sc) of 24.9 mA cm(-2) and a PCE of 15.4%. Our work demonstrates a new way to tune the photoelectronic properties of the Y-series NFAs.
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