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Synthesis of a soluble polythiophene copolymer with thiophene–vinylene conjugated side chain and its applications in photovoltaic devices
Author(s) -
Qu Bo,
Jiang Zhongliang,
Chen Zhijian,
Xiao Lixin,
Tian Di,
Gao Chao,
Wei Wei,
Gong Qihuang
Publication year - 2011
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.35078
Subject(s) - polythiophene , thiophene , copolymer , side chain , materials science , pedot:pss , conjugated system , polymer chemistry , photovoltaic system , open circuit voltage , polymer solar cell , energy conversion efficiency , organic solar cell , conductive polymer , photochemistry , chemical engineering , polymer , optoelectronics , organic chemistry , chemistry , voltage , electrical engineering , composite material , engineering
A new soluble polythiophene copolymer with thiophene‐vinylene conjugated side chain poly[3‐(5′‐octylthienylenevinyl) thiophene]‐thiophene (POTVTh‐Th) was successfully synthesized and characterized using NMR, UV‐visible spectroscopy, etc. To study the photovoltaic property of the copolymer, photovoltaic device of ITO/PEDOT:PSS/POTVTh‐Th:[6,6]‐phenyl C 61 ‐butyric acid methyl ester (PC 61 BM) (weight ratio being 1 : 1)/LiF/Al was fabricated, in which POTVTh‐Th acted as the electron donor in the active layer. Under 100 mW/cm 2 AM 1.5G simulated solar emission, the open‐circuit voltage and the short‐circuit current density of the device were 0.58 V and 2.50 mA/cm 2 , respectively. The power conversion efficiency and the fill factor of the photovoltaic device were evaluated to be 0.42% and 0.30. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012