Copolymers of diketopyrrolopyrrole and thienothiophene for photovoltaic cells

被引：90

作者：

Bijleveld, Johan C. ^{[1
]}

Verstrijden, R. A. Melanie ^{[1
]}

Wienk, Martijn M. ^{[1
]}

Janssen, Rene A. J. ^{[1
]}

机构：

[1] Eindhoven Univ Technol, NL-5600 MB Eindhoven, Netherlands

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2011年 / 21卷 / 25期

关键词：

POLYMER SOLAR-CELLS; ENERGY-TRANSFER; BANDGAP; EFFICIENT; CHARGE; PERFORMANCE; ACCEPTOR; DONOR; MORPHOLOGY;

D O I：

10.1039/c1jm10961h

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 x 10(-2) and 2 x 10(-3) cm(2) V-1 s(-1), respectively. Organic solar cells based on the PDPPnT-TT polymers as donors and the fullerene derivative [60]PCBM as acceptor achieve power conversion efficiencies up to 3.4% when the layer is deposited with the use of a co-solvent. The co-solvent strongly affects the morphology of the active layer and improves the performance. For these polymers the LUMO-LUMO offset with [60]PCBM correlates with the photocurrent and the maximum external quantum efficiency.

引用

页码：9224 / 9231

页数：8

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