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Issue 81, 2014
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Impact of dithienyl or thienothiophene units on the optoelectronic and photovoltaic properties of benzo[1,2,5]thiadiazole based donor–acceptor copolymers for organic solar cell devices

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Abstract

We report a comparative study on four donor–acceptor benzothiadiazole-based copolymers containing dithienyl or thienothiophene moieties for application in organic photovoltaic (OPV) devices. Bulk-heterojunction OPV devices are fabricated having power conversion efficiencies ranging between 4 and 6%. Morphological, spectroscopic and charge-transport measurements are used to investigate the influence of either the dithienyl or thienothiophene moieties on the structure and photophysical properties of the copolymer and copolymer:PC71BM blend films and rationalise the solar cell characteristics. Although all copolymer:PC71BM blends exhibit comparable hole polaron yields, solar cell devices with the highest power conversion efficiencies are correlated with increased charge-carrier mobility of the copolymer and enhanced aggregation of PC71BM in the blend.

Graphical abstract: Impact of dithienyl or thienothiophene units on the optoelectronic and photovoltaic properties of benzo[1,2,5]thiadiazole based donor–acceptor copolymers for organic solar cell devices

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Publication details

The article was received on 16 Jul 2014, accepted on 21 Aug 2014 and first published on 29 Aug 2014


Article type: Paper
DOI: 10.1039/C4RA07186G
Citation: RSC Adv., 2014,4, 43142-43149
  • Open access: Creative Commons BY license
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    Impact of dithienyl or thienothiophene units on the optoelectronic and photovoltaic properties of benzo[1,2,5]thiadiazole based donor–acceptor copolymers for organic solar cell devices

    A. J. Pearson, D. C. Watters, H. Yi, M. S. Sarjadi, L. X. Reynolds, P. P. Marchisio, J. Kingsley, S. A. Haque, A. Iraqi and D. G. Lidzey, RSC Adv., 2014, 4, 43142
    DOI: 10.1039/C4RA07186G

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