Copolymers of diketopyrrolopyrrole and thienothiophene for photovoltaic cells

JC Bijleveld, RAM Verstrijden, MM Wienk…

Index: Bijleveld, Johan C.; Verstrijden, R. A. Melanie; Wienk, Martijn M.; Janssen, Rene A. J. Journal of Materials Chemistry, 2011 , vol. 21, # 25 p. 9224 - 9231

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Citation Number: 66

Abstract

Three copolymers of thieno [3, 2-b] thiophene (TT) and diketopyrrolo [3, 4-c] pyrrole (DPP) with a varying number of interconnecting thiophene units (nT) were synthesized by Suzuki polymerization. The PDPPnT-TT polymers display optical band gaps in the range of 1.33 to 1.52 eV and show ambipolar charge transport when applied in a field-effect transistor (FET) with hole and electron mobilities up to 3× 10− 2 and 2× 10− 3 cm2 V− 1s− 1, respectively. ...