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Changing the π-bridge from thiophene to thieno[3,2-b]thiophene for D-π-A type polymer enables high performance fullerene-free organic solar cells

Abstract

For photovoltaic polymers with D-π-A backbone, there are a great deal of D and A units, but the choice of π bridge is relatively limited and thiophene (T) is still the most effective one. Here we utilized two D-π-A polymers, J52-FS with thiophene as π bridge and PE2 with thieno[3,4-b]thiophene (TT) as π bridge, to combine with a low band-gap non-fullenere Y6, respectively. The photovoltaic cells based on PE2: Y6 can realize a PCE of 13.50%, which is obviously higher than the 10.58% of J52-FS: Y6 analog. Our works demonstrate that using TT as π-bridge is a simple and promising approach to construct efficient photovotaic polymers.

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Supplementary files

Publication details

The article was received on 15 Apr 2019, accepted on 14 May 2019 and first published on 15 May 2019


Article type: Communication
DOI: 10.1039/C9CC02904D
Chem. Commun., 2019, Accepted Manuscript

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    Changing the π-bridge from thiophene to thieno[3,2-b]thiophene for D-π-A type polymer enables high performance fullerene-free organic solar cells

    Y. Chen, Y. Geng, A. Tang, X. Wang, Y. Sun and E. Zhou, Chem. Commun., 2019, Accepted Manuscript , DOI: 10.1039/C9CC02904D

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