Synthesis and Photovoltaic Properties of Conjugated Copolymers with Benzo[1,2‐b:4,5‐b′]dithiophene and Bis(thiophene)phthalimide Units | Zendy

Zhang Guobing | Zendy; Fu Yingying | Zendy; Zhang Qing | Zendy; Xie Zhiyuan | Zendy

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Synthesis and Photovoltaic Properties of Conjugated Copolymers with Benzo[1,2‐b:4,5‐b′]dithiophene and Bis(thiophene)phthalimide Units

Author(s) -

Zhang Guobing,

Fu Yingying,

Zhang Qing,

Xie Zhiyuan

Publication year - 2010

Publication title -

macromolecular chemistry and physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.57

H-Index - 112

eISSN - 1521-3935

pISSN - 1022-1352

DOI - 10.1002/macp.201000430

Subject(s) - phthalimide , stille reaction , copolymer , thiophene , materials science , polymer chemistry , conjugated system , acceptor , open circuit voltage , polymer solar cell , energy conversion efficiency , photovoltaic system , solar cell , organosilicon , photochemistry , polymer , chemistry , optoelectronics , organic chemistry , voltage , physics , quantum mechanics , composite material , condensed matter physics , ecology , biology

Two new donor/acceptor copolymers PBDTPhBT1 and PBDTPhBT2 with alternating benzodithiophene ( BDT ) and bisthiophene‐phthalimide ( PhBT ) units were synthesized by Stille coupling reaction. The copolymers showed identical optical bandgaps of 1.98 eV. The HOMO energy levels are −5.35 and −5.32 eV for PBDTPhBT1 and PBDTPhBT2 , respectively. The bulk heterojunction solar cell devices based on these copolymers as donors and PC 71 BM as acceptor displayed high open‐circuit voltages of 0.90–0.93 V and achieved power conversion efficiency of 1.54% under the illumination of AM 1.5, 100 mW · cm −2 .

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