Issue 25, 2012

Photovoltaic and field effect transistor performance of selenophene and thiophene diketopyrrolopyrroleco-polymers with dithienothiophene

Abstract

Here we report the synthesis of two new alternating co-polymers of thiophene and selenophene flanked diketopyrrolopyrrole with dithienothiophene. We find that the inclusion of the rigid fused dithienothiophene co-monomer affords semi-crystalline polymers, that exhibit promising ambipolar field effect transistor performance, with hole mobilities up to 0.23 cm2 Vāˆ’1 sāˆ’1. The selenophene containing co-polymer exhibits a reduced band gap compared to the thiophene co-polymer, as a result of stabilisation of the polymer LUMO and destabilisation of the HOMO. The thiophene co-polymer exhibits promising solar cell performance in blends with PC71BM, with device efficiencies up to 5.1%.

Graphical abstract: Photovoltaic and field effect transistor performance of selenophene and thiophene diketopyrrolopyrrole co-polymers with dithienothiophene

Supplementary files

Article information

Article type
Paper
Submitted
26 Feb 2012
Accepted
22 Apr 2012
First published
24 Apr 2012

J. Mater. Chem., 2012,22, 12817-12823

Photovoltaic and field effect transistor performance of selenophene and thiophene diketopyrrolopyrrole co-polymers with dithienothiophene

M. Shahid, R. S. Ashraf, Z. Huang, A. J. Kronemeijer, T. McCarthy-Ward, I. McCulloch, J. R. Durrant, H. Sirringhaus and M. Heeney, J. Mater. Chem., 2012, 22, 12817 DOI: 10.1039/C2JM31189E

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