Fused Dithienogermolodithiophene Low Band Gap Polymers for High-Performance Organic Solar Cells without Processing Additives | Zendy

Hongliang Zhong | Zendy; Zhe Li | Zendy; Florent Deledalle | Zendy; Elisa Collado Fregoso | Zendy; Munazza Shahid | Zendy; Zhuping Fei | Zendy; Christian B. Nielsen | Zendy; Nir YaacobiGross | Zendy; Stephan Rossbauer | Zendy; Thomas D. Anthopoulos | Zendy; James R. Durrant | Zendy; Martin Heeney | Zendy

Open Access

Fused Dithienogermolodithiophene Low Band Gap Polymers for High-Performance Organic Solar Cells without Processing Additives

Author(s) -

Hongliang Zhong,

Zhe Li,

Florent Deledalle,

Elisa Collado Fregoso,

Munazza Shahid,

Zhuping Fei,

Christian B. Nielsen,

Nir YaacobiGross,

Stephan Rossbauer,

Thomas D. Anthopoulos,

James R. Durrant,

Martin Heeney

Publication year - 2013

Publication title -

journal of the american chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 7.115

H-Index - 612

eISSN - 1520-5126

pISSN - 0002-7863

DOI - 10.1021/ja311700u

Subject(s) - chemistry , polymer solar cell , polymer , band gap , polymerization , thiophene , stille reaction , monomer , condensation polymer , annealing (glass) , polymer chemistry , chemical engineering , solar cell , organic solar cell , organic chemistry , optoelectronics , materials science , composite material , engineering

We report the synthesis of a novel ladder-type fused ring donor, dithienogermolodithiophene, in which two thieno[3,2-b]thiophene units are held coplanar by a bridging dialkyl germanium. Polymerization of this extended monomer with N-octylthienopyrrolodione by Stille polycondensation afforded a polymer, pDTTG-TPD, with an optical band gap of 1.75 eV combined with a high ionization potential. Bulk heterojunction solar cells based upon pDTTG-TPD:PC(71)BM blends afforded efficiencies up to 7.2% without the need for thermal annealing or processing additives.

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