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Electronic Properties and Photovoltaic Performances of a Series of Oligothiophene Copolymers Incorporating Both Thieno[3,2-b]thiophene and 2,1,3-Benzothiadiazole Moieties

Abstract : A series of donor-acceptor alternated conjugated copolymers, composed of thiophene, bithio-phene, thieno[3,2-b]thiophene, and 2,1,3-benzothiadiazole units and differing from each other by the nature and the number of 3-alkylthiophene in the backbone, have been synthesized by Stille cross-coupling polymerization. The material's optical and electrochemical properties, in solution and in thin films, have been investigated using UV-Visible absorption and cyclic voltammetry. Bulk heterojunction solar cells using blends of the newly synthesized copolymers, as electron donor, and C60-PCBM or C70-PCBM, as electron transporting material, have been elaborated. A maximum power conversion efficiency of 1.8% is achieved with a 1:4 PPBzT(2)-C12:C70-PCBM weight ratio.
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https://hal.archives-ouvertes.fr/hal-00679946
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Submitted on : Friday, March 16, 2012 - 4:21:12 PM
Last modification on : Tuesday, May 12, 2020 - 11:04:03 AM

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Laure Biniek, Christos L. Chochos, Georges Hadziioannou, Nicolas Leclerc, Patrick Leveque, et al.. Electronic Properties and Photovoltaic Performances of a Series of Oligothiophene Copolymers Incorporating Both Thieno[3,2-b]thiophene and 2,1,3-Benzothiadiazole Moieties. Macromolecular Rapid Communications, Wiley-VCH Verlag, 2010, 31 (7), pp.651-656. ⟨10.1002/marc.200900804⟩. ⟨hal-00679946⟩

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