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Kun Wang, Zhi-Guo Zhang, Qiang Fu and Yongfang Li Synthesis and Photovoltaic Properties of a D–A Copolymer Based on the 2,3-Di(5-hexylthio­phen-2-yl)quinoxaline Acceptor Unit Macromolecular Chemistry and Physics 215

Article first published online: 25 FEB 2014 | DOI: 10.1002/macp.201300793

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A new D–A copolymer, PBDT-DTQx, based on the 2,3-di(5-hexylthiophen-2-yl)­quinoxaline (>DTQx) acceptor unit is designed and synthesized for application as a donor material in polymer solar cells (PSCs). The device based on PBDT-DTQx:PC70BM (1:2.5, w/w) with chloronaphthalene as a solvent additive displays a power conversion efficiency (PCE) of 3.15%. With methanol treatment, the PCE of the PSCs is further improved to 3.90%.

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