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Comparative study of the optical, electrochemical, electrolumiscent, and photovoltaic properties of dendritic pendants modified poly( p ‐phenylene vinylene)s
Author(s) -
Tan Zhanao,
Zhang Wenqing,
Qian Deping,
Zheng Hua,
Xiao Shengqiang,
Li Yongfang,
Tang Rupei,
Xi Fu
Publication year - 2011
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.1792
Subject(s) - materials science , poly(p phenylene vinylene) , copolymer , polymer chemistry , steric effects , photoluminescence , electrochemistry , energy conversion efficiency , photochemistry , electroluminescence , chemistry , stereochemistry , nanotechnology , polymer , optoelectronics , electrode , layer (electronics) , composite material
In this study, the optical, electrochemical, electrolumiscent, and photovoltaic properties of a series of poly( p ‐phenylene vinylene) (PPV) derivatives bearing different dendritic pendants, poly{2‐[3′,5′‐bis(2″‐ethylhexyloxy)benzyloxy]‐1,4‐phenylenevinylene} (BE‐PPV), poly{2‐[2′,5′‐bis(3″,7″‐dimethyl)octyloxy]‐1,4‐phenylenevinylene} (BD‐PPV), poly[2‐methoxy‐5‐(2′‐ethylhexyloxy)‐1,4‐phenylenevinylene] (MEH‐PPV), poly{2‐[3′,5′‐bis(2″‐ethylhexyloxy)benzyloxy]‐1,4‐phenylenevinylene}‐co‐poly[2‐methoxy‐5‐(2′‐ethylhexyloxy)‐1,4‐phenylenevinylene] (BE‐co‐MEH‐PPV), and poly{2‐[2′,5′‐bis(3″,7″‐dimethyl)octyloxy]‐1,4‐phenylenevinylene}‐co‐poly[2‐methoxy‐5‐(3′,7′‐dimethyloctyloxy)‐1,4‐phenylenevinylene] (BD‐co‐MDMO‐PPV), were investigated. The steric pendants strongly affect the absorption spectra, photoluminescence (PL) sepctra, the onset oxidation/reduction potentials, and further affect the electrolumiscent and photovoltaic properties. Copolymerization can reduce the steric effect and improve the electrolumiscent and photovoltaic properties. The brightness of light‐emitting diodes base on copolymer BE‐co‐MEH‐PPV and BD‐co‐MDMO‐PPV reached 3988 and 3864 cd/m 2 , respectively, much higher than that based on homopolymer BE‐PPV (523 cd/m 2 ) and BD‐PPV (333 cd/m 2 ), also higher than that based on MEH‐PPV (3788 cd/m 2 ). The power conversion efficiency (PCE) of solar cells based on BE‐co‐MEH‐PPV and BD‐co‐MDMO‐PPV reached 1.41, 0.76%, respectively, much higher than that based on BE‐PPV (0.24%) and BD‐PPV (0.14%). Copyright © 2010 John Wiley & Sons, Ltd.