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A phenylenevinylene‐thiophene‐phenyleneethynylene copolymer: synthesis, characterization, and photovoltaic properties
Author(s) -
Zou Yingping,
Tan Zhan'ao,
Huo Lijun,
Li Yongfang
Publication year - 2008
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1051
Subject(s) - materials science , thiophene , copolymer , sonogashira coupling , polymer chemistry , phenylene , photoluminescence , energy conversion efficiency , polythiophene , conductive polymer , polymer , catalysis , organic chemistry , optoelectronics , palladium , composite material , chemistry
A phenylenevinylene‐thiophene‐phenyleneethynylene copolymer, poly{[1′,4′‐bis‐(thienyl‐vinyl)]‐2‐methoxy‐5‐(2′‐ethylhexyloxy)‐1,4‐phenylene‐vinylene‐alt‐1,4‐dioctyloxyl‐phenyleneethynylene}(PTPPV‐ PPE), was synthesized by the Sonogashira Pd‐catalyzed cross‐coupling reaction. The copolymer possesses higher thermal decomposition temperature ( T d = 382°C) compared with poly{[1′,4′‐bis‐ (thienyl‐vinyl)]‐2‐methoxy‐5‐(2′‐ethylhexyloxy)‐1,4‐phenylene‐vinylene} (PTPPV). The absorption and photoluminescence (PL) peaks of PTPPV‐PPE solution and solid film locate in between those of the homopolymers of PTPPV and poly(1,4‐dioctyloxyl‐phenyleneethynylene) (PPE), and closer to that of PTPPV. Photovoltaic cell was fabricated based on the blend of PTPPV‐PPE and PCBM with a weight ratio of 1:1. The primary result shows an open circuit voltage ( V oc ) of 0.72 V which is higher than that of the PTPPV (0.67 V), and a power conversion efficiency (PCE) of 0.3% under the illumination of AM1.5, 100 mW/cm 2 which is much better than that of PPEs. Copyright © 2008 John Wiley & Sons, Ltd.