Fullerene-based supramolecular nanoclusters with poly[2-methoxy-5-(2'- ethylhexyioxy)-p-phenylenevinylene] for light energy conversion

Taku Hasobe, Shunichi Fukuzumi, Prashant V. Kamat, Hideyuki Murata

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Organized composite molecular nanoassemblies of fullerene and poly[2-methoxy-5-(2'-ethylhexyloxy)-p-phenylenevinylene] (MEH-PPV) prepared in acetonitrile/toluene mixed solvent absorb light over the entire spectrum of visible light. The highly colored composite clusters can be assembled as a three-dimensional array onto nanostructured SnO2 films by electrophoretic deposition approach. The composite cluster films exhibit an incident photon-to-photocurrent efficiency (IPCE) as high as 18%, which is significantly higher than that of a molecular assembly composed of 5,10,15,20-tetrakis(3,5-di-tert-butylphenyl)-21H,23H-porphyrin (H2P) and C60 prepared in the same manner (4%). The maximum IPCE value increases to 25% at an applied bias potential of 0.2V vs saturated calomel reference electrode (SCE). The power conversion efficiency of a MEH-PPV and C60 assembly-modified electrode is determined to be 0.24%. The photocurrent generation properties observed with MEH-PPV and C60 clusters demonstrate the synergy of these systems towards yielding efficient photoinduced charge separation within these composite nanoclusters.

Original languageEnglish
Pages (from-to)1223-1229
Number of pages7
JournalJapanese journal of applied physics
Volume47
Issue number2 PART 2
DOIs
Publication statusPublished - 2008 Feb 15
Externally publishedYes

Keywords

  • Fullerene
  • MEH-PPV
  • Organic solar cell
  • Porphyrin
  • Supramolecular assembly

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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