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Photocurrent Generation in Multilayer Self‐Assembly Films Fabricated from Water‐Soluble Poly(phenylene vinylene)
Author(s) -
Li Hongmei,
Li Yuliang,
Zhai Jin,
Cui Guanglei,
Liu Huibiao,
Xiao Shengqiang,
Liu Yang,
Lu Fushen,
Jiang Lei,
Zhu Daoben
Publication year - 2003
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200305037
Subject(s) - photocurrent , phenylene , materials science , self assembly , poly(p phenylene) , water soluble , photoconductivity , poly(p phenylene vinylene) , polymer chemistry , optoelectronics , nanotechnology , chemistry , electroluminescence , polymer , organic chemistry , composite material , layer (electronics)
A novel, water‐soluble, cationic PPV derivative poly{(2,5‐bis(3‐bromotrimethylammoniopropoxy)‐phenylene‐1,4‐divinylene)‐ alt ‐1,4‐(2,5‐bis(2‐(2‐hydroxyethoxy)ethoxy))phenylene vinylene} (BH‐PPV) has been synthesized by a Heck coupling reaction. Multilayered assemblies of the BH‐PPV and the sodium salt of hexa(sulfobutyl)fullerenes (C 60 ‐HS) were fabricated successfully by an alternate deposition technique. The multilayer structures were studied by UV/Vis spectroscopy, small angle X‐ray diffraction, and atomic force microscopy. The photoinduced charge transfer property of the self‐assembled multilayer film was also measured by a three‐electrode cell technique. A steady and rapid cathodic 5.5 μA cm −2 photocurrent response was measured as the irradiation of the multilayer film was switched on and off. Importantly, the response of on/off cycling is prompt and reproducible. A possible mechanism for the electron‐transfer process is proposed.