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Issue 110, 2014
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Low band gap disk-shaped donors for solution-processed organic solar cells

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Abstract

Disk-shaped donors 1–4 composed of a pyrene core, dithiophene linkers and rhodanine terminates were synthesized and their optical and electrochemical properties were investigated. The introduction of rhodanine terminal units into the pyrene-cored donors could effectively broaden the absorption spectrum and improve the molar absorption coefficient. The positions of thiophene oligomer in the pyrene core affected their optical and electrochemical properties as well as the molecular ordering and carrier transport properties in the solid state. The energy levels of these molecules are suitable for donor components in bulk heterojunction solar cells with fullerene derivatives. A 4/PC71BM cell achieved an overall power conversion efficiency of 3.7% with a short-current density of 8.4 mA cm−2, open-circuit voltage of 1.09 V, and fill factor of 41% under one sun condition.

Graphical abstract: Low band gap disk-shaped donors for solution-processed organic solar cells

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Publication details

The article was received on 13 Sep 2014, accepted on 14 Nov 2014 and first published on 20 Nov 2014


Article type: Paper
DOI: 10.1039/C4RA10347E
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Citation: RSC Adv., 2014,4, 64589-64595
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    Low band gap disk-shaped donors for solution-processed organic solar cells

    K. Takemoto and M. Kimura, RSC Adv., 2014, 4, 64589
    DOI: 10.1039/C4RA10347E

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