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Issue 18, 2012
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Impact of dye end groups on acceptor–donor–acceptor type molecules for solution-processed photovoltaic cells

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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.

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

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Publication details

The article was received on 11 Jan 2012, accepted on 10 Mar 2012 and first published on 14 Mar 2012


Article type: Paper
DOI: 10.1039/C2JM30194F
Citation: J. Mater. Chem., 2012,22, 9173-9180
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    Impact of dye end groups on acceptor–donor–acceptor type molecules for solution-processed photovoltaic cells

    G. He, Z. Li, X. Wan, Y. Liu, J. Zhou, G. Long, M. Zhang and Y. Chen, J. Mater. Chem., 2012, 22, 9173
    DOI: 10.1039/C2JM30194F

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