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Poly(3-hexylthiophene)-based non-fullerene solar cell achieves high photovoltaic performance with small energy loss

Abstract

Inspired by the remarkable promotion of power conversion efficiency, commercial applications of organic photovoltaics (OPV) can be foreseen in near future. Regioregular poly(3-hexylthiophene) (P3HT) as one of the most commonly used and thoroughly studied homopolymer is very promising, which can be produced in kilogram quantities and demonstrated as a promising commercial candidate for large-area, roll-to-roll printed solar cells. In this work, we designed a new low-bandgap electron acceptor material ATT-3, by combining rhodanine and octyl thieno[3,4-b]thiophene-2-carboxylate as the electron-deficient part. ATT-3 shows a plannar backbone configuration facilitating charge transport and exhibits strong and broad absorption ranging from 300-770 nm with an optical bandgap of 1.61 eV. ATT-3 shows a complementary absorption and well-matched HOMO and LUMO energy levels with P3HT. P3HT:ATT-3-based PSCs show a high PCE of 6.26% with a high Voc of 0.927 V at a small energy loss of 0.68 eV, which is comparable to the best value obtained by O-IDTBR acceptor. In contrast, the devices based on P3HT:PC71BM blends offer a PCE of 4.05% with a Voc of 0.624 V at a large energy loss of 1.27 eV. Thus, the small energy loss induced by ATT-3 is noteworthy, which provides more space for achieving higher photovoltaic performance in future.

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Publication details

The article was received on 12 Jun 2017, accepted on 14 Jul 2017 and first published on 14 Jul 2017


Article type: Communication
DOI: 10.1039/C7TA05108E
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Poly(3-hexylthiophene)-based non-fullerene solar cell achieves high photovoltaic performance with small energy loss

    F. Liu, J. Zhang, Z. Zhou, J. Zhang, Z. Wei and X. Zhu, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA05108E

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