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Novel Benzo[1,2‐ b :4,5‐ b ′]dithiophene–Benzothiadiazole Derivatives with Variable Side Chains for High‐Performance Solar Cells
Author(s) -
Peng Qiang,
Liu Xiangju,
Su Dan,
Fu Guanwen,
Xu Jun,
Dai Liming
Publication year - 2011
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201101933
Subject(s) - materials science , side chain , copolymer , thiophene , open circuit voltage , acceptor , energy conversion efficiency , fluorine , photovoltaic system , band gap , organic solar cell , combinatorial chemistry , optoelectronics , organic chemistry , voltage , polymer , chemistry , electrical engineering , physics , condensed matter physics , composite material , metallurgy , engineering
Low bandgap copolymers are prepared by incorporating thiophene‐modified benzo[1,2‐ b :4,5‐ b ′]dithiophene and alkyloxy or fluorine‐modified benzothiadiazole as donor and acceptor units. These copolymers exhibit a high open‐circuit voltage and short‐circuit current density. Good power conversion efficiencies are demonstrated in solar cell studies, indicating their promising photovoltaic application as donor materials.