Photocurrent generation in multilayer self-assembly films fabricated from water-soluble poly(phenylene vinylene)

Hongmei Li, Yuliang Li, Jin Zhai, Guanglei Cui, Huibiao Liu, Shengqiang Xiao, Yang Liu, Fushen Lu, Lei Jiang, Daoben Zhu

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59 Citations (Scopus)

Abstract

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 (C60-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.

Original languageEnglish
Pages (from-to)6031-6038
Number of pages8
JournalChemistry - A European Journal
Volume9
Issue number24
DOIs
Publication statusPublished - 15 Dec 2003
Externally publishedYes

Keywords

  • Electron transfer
  • Electrostatic interactions
  • Photocurrent response
  • Polymers
  • Self-assembly

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