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Synthesis and Photovoltaic Properties of a Donor‐Acceptor Copolymer of Dithienosilole and 5,6‐Bis(octyloxy)benzo[1,2,5]thiadiazole
Author(s) -
Huang Youguang,
Zhang Maojie,
Jing Yan,
Fan Huili,
Guo Xia,
Li Yongfang
Publication year - 2012
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.201200333
Subject(s) - copolymer , acceptor , stille reaction , open circuit voltage , materials science , energy conversion efficiency , band gap , polymer , polymer chemistry , thermal stability , short circuit , polymer solar cell , photovoltaic system , photochemistry , chemistry , optoelectronics , voltage , organic chemistry , physics , quantum mechanics , composite material , condensed matter physics , ecology , biology
A donor‐acceptor (D‐A) copolymer, PDTSDOBT , based on dithienosilole and 5,6‐bis(octyloxy)benzo[1,2,5]thiadiazole is synthesized by Pd‐catalyzed Stille coupling reaction for application as a donor material in polymer solar cells (PSCs). The polymer shows good thermal stability, strong absorption in the visible region, and a relatively low bandgap of 1.63 eV. The hole mobility of PDTSDOBT as measured by SCLC is 5.58 × 10 −4 cm 2 V −1 s −1 . The power conversion efficiency of a PSC based on PDTSDOBT : PC 70 BM (1:2 w/w) is 3.51% with a short‐circuit current density of 8.96 mA cm −2 , an open‐circuit voltage of 0.69 V, and a fill factor of 0.568, under the 100 mW cm −2 AM1.5G illumination.