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Synthesis and Photovoltaic Properties of a Thienylenevinylene and Diketopyrrolopyrrole Copolymer with High Mobility
Author(s) -
Lim Bogyu,
Yeo JunSeok,
Khim Dongyoon,
Kim DongYu
Publication year - 2011
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201100327
Subject(s) - materials science , band gap , polymer solar cell , polymer , optoelectronics , electron mobility , stille reaction , copolymer , active layer , energy conversion efficiency , polymerization , photochemistry , photovoltaic system , acceptor , electron acceptor , layer (electronics) , thin film transistor , nanotechnology , chemistry , composite material , ecology , physics , condensed matter physics , biology
A novel donor–acceptor‐type polymer with a low band‐gap that alternates electron‐rich thienylenevinylene groups with electron‐deficient diketopyrrolopyrrole (DPP) units (PETVTDPP) has been synthesized by Pd‐catalyzed Stille cross‐coupling polymerization. The polymer shows a broad absorption band of wavelengths that range from 330 to 900 nm, and a low band‐gap value of 1.43 eV. The field‐effect mobility of an organic thin‐film transistor based on this polymer is 0.05 cm 2 · Vs −1 . Bulk‐heterojunction solar cells using a mixture of PETVTDPP and PC [71] BM for the active layer show a power conversion efficiency (PCE) of 1.94% under simulated AM 1.5 G solar irradiation at 100 mW · cm −2 .