Chemical Society of Japan, Chemistry Letters, 8(44), p. 1128-1130, 2015
DOI: 10.1246/cl.150407
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Organic semiconductors with a donor-acceptor-donor architecture based on the novel acceptor unit of quinoxalineimide (QI) were designed and synthesized. They absorbed wider wavelength light compared to PC61BM, and functioned as acceptor materials for solution-processed bulk-heterojunction organic photovoltaic devices. In addition, the relatively shallow LUMO levels, due to the electron-withdrawing pyrazine and imide groups of the QI unit, resulted in a high open circuit voltage of the devices.