Porphyrin-based molecular architectures for light energy conversion

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

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We have constructed a series of supramolecular photovoltaic cells composed of multi-porphyrin arrays such as porphyrin-alkanethiolate monolayer protected-gold nanoparticles [H2PCnMPC: n is the number of methylene groups in the spacer], porphyrin dendrimers [DnPn], and porphyrin-peptide oligomers [P(H2P)n] and fullerene (C60) on nanostructured SnO2 electrodes (OTE/SnO2). These multi-porphyrin arrays form complexes with fullerene molecules and they form clusters in acetonitrile/toluene mixed solvent. The highly colored composite clusters are assembled as three-dimensional arrays onto nanostructured SnO2 films [denoted as OTE/SnO2/(multi-porphyrin array+C60)m] using an electrophoretic deposition method. These highly organized molecular assembly films attain drastic enhancement of light energy conversion properties as compared to the non-organized reference system. The maximum power conversion efficiency () of OTE/SnO2/(H2PC15MPC+C60)m reaches 1.5%, which is 45 times higher than that of the reference system (0.035%).

Original languageEnglish
Pages (from-to)39-51
Number of pages13
JournalMolecular Crystals and Liquid Crystals
Volume471
Issue number1
DOIs
Publication statusPublished - 2007 Jan 1
Externally publishedYes

Keywords

  • Fullerene
  • Photovoltaic cell
  • Porphyrin
  • Supramolecular assembly

ASJC Scopus subject areas

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

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