Enhanced energy and quantum efficiencies of a nanocrystalline photoelectrochemical cell sensitized with a donor-acceptor dyad derived from fluorescein

Shigeki Hattori, Taku Hasobe, Kei Ohkubo, Yasuteru Urano, Naoki Umezawa, Tetsuo Nagano, Yuji Wada, Shozo Yanagida, Shunichi Fukuzumi

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

The dye-sensitized photovoltaic cells were prepared by using donor-acceptor dyads derived from fluorescein. The photovoltaic measurements were performed using a standard two-electrode system consisting of a working electrode and a Pt sputtered electrode in air-saturated methoxyacetonitrile containing 0.5 M iodide and 0.05 M I2. The xanthene dye-sensitized photovoltaic cells of the charge-separation type exhibit significant enhancement in the photoelectrochemical performance as compared with those of fluorescein without the charge-separation unit. The overall power conversion efficiency (ν = 1.6%) has been attained by using a fluorescein derivative composed of an electron donor (diphenylanthracene) unit and an acceptor unit (difluoroxanthene), assembled on a ZnO-SnO2 composite film as an oxide semiconductor.

Original languageEnglish
Pages (from-to)15200-15205
Number of pages6
JournalJournal of Physical Chemistry B
Volume108
Issue number39
DOIs
Publication statusPublished - 2004 Sep 30

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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