Impact of dye end groups on acceptor–donor–acceptor type molecules for solution-processed photovoltaic cells†,10.1039/C2JM30194F

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Lactoyl-CoA 全氟丁基戊烷白叶藤碱全氟己基辛烷新白叶藤碱壳寡糖特色专题-生物多肽

Impact of dye end groups on acceptor–donor–acceptor type molecules for solution-processed photovoltaic cells†

Guangrui He,Zhi Li,Xiangjian Wan,Yongsheng Liu,Jiaoyan Zhou,Guankui Long,Mingtao Zhang,Yongsheng Chen

Journal of Materials Chemistry Pub Date : 03/14/2012 00:00:00 , DOI:10.1039/C2JM30194F

Abstract

Two new oligothiophene derivatives of the acceptor–donor–acceptor type, incorporating double rhodanine or 1,3-dimethylpyrimidine-2,4,6(1H,3H,5H)-trione units as the terminal acceptor groups, D2R(8 + 2)7T and DTDMP7T, have been designed and synthesized for solution-processable small molecule BHJ solar cells. The impacts of these different end dye moieties on their optical, electrochemical properties, morphology, mobility and solar cell performance were studied. Both compounds exhibit broad and highly efficient solar absorption with low bandgaps of 1.70 and 1.62 eV for D2R(8 + 2)7T and DTDMP7T, respectively. The D2R(8 + 2)7T and DTDMP7T based BHJ solar cell devices achieved a PCE of 2.46% and 4.05%, respectively, under the illumination of AM.1.5, 100 mW cm⁻².