Photocurrent generation of poly(3,4-ethylenedioxythiophene)-on-TiO2 nanoparticle

Jehoon Baek, Yuna Kim, Eunkyoung Kim

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The photocurrent generation of poly(3,4-ethylenedioxythiophene) (PEDOT) grown on TiO2 nanoparticles were examined. PEDOT was deposited on the surface of mesoporous TiO2 nanoparticle by chemical polymerization of 3,4- ethylenedioxythiophene (EDOT) under oxidative condition, to afford blue colored conductive particles, having average diameter of 80nm when the feed ratio between TiO2 and EDOT was 1:1.5 by weight. A photoelectrode coated with the PEDOT-on-TiO2 nanoparticles showed much higher photocurrent generation for a redox couple of hydroqunone and quinone, compared to that of PEDOT or TiO2 only. The photoelectrode prepared from PEDOT-on-TiO2 nanoparticles (ratio 1/2) showed photocurrent higher than 2.8μA/cm2 upon excitation with UV light under an external potential of-0.4V (versus Ag/AgCl). The current generation and photoswitching properties was maximized when the feed ratio between TiO2 and PEDOT was 1:2.

Original languageEnglish
Pages (from-to)275-282
Number of pages8
JournalMolecular Crystals and Liquid Crystals
Volume483
DOIs
Publication statusPublished - 2008 Apr 15

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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