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Polythiophene derivatives compatible with both fullerene and non-fullerene acceptors for polymer solar cells

Abstract

In this work we report three novel polythiophene derivatives (P4T2F-HD, P4T2F-HD/BO, and P4T2F-BO) which are synthesized via a three-step reaction for each case. The polymers show excellent coplanarity and desired aggregation characteristics in solution. The HOMO energy levels of the new polymers were down-shifted by 0.4 eV as compared to the commercial polymer poly(3-hexylthiophene) (P3HT). The polymers are able to produce high device performance when combined with both fullerene and non-fullerene acceptors. When blended with a non-fullerene acceptor (5Z,5’Z)-5,5’-(((4,4,9,9-tetraoctyl-4,9-dihydro-s-indaceno[1,2-b:5,6-b’]dithiophene-2,7-diyl)bis(benzo[c][1,2,5]thiadiazole-7,4-diyl))bis-(methanylylidene)) bis(3-ethyl-2-thioxothiazolidin-4-one) (O-IDTBR), P4T2F-HD offers the highest PCE of 7.0% with a high Voc of 1.04 V. Moreover, P4T2F-HD can tolerate the variation of active layer thickness in a large range when blended with a fullerene acceptor. The decent device performance and processability under mild conditions demonstrate that polythiophene derivatives hold great potential for application in large-scale production of polymer solar cell modules.

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Publication details

The article was received on 19 Sep 2018, accepted on 03 Dec 2018 and first published on 05 Dec 2018


Article type: Paper
DOI: 10.1039/C8TC04746D
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    Polythiophene derivatives compatible with both fullerene and non-fullerene acceptors for polymer solar cells

    X. Jia, Z. Chen, C. Duan, Z. Wang, Q. Yin, F. Huang and Y. Cao, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC04746D

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