SrTiO3 recombination-inhibiting barrier layer for type II dye-sensitized solar cells

Idan Hod, Menny Shalom, Zion Tachan, Sven Rühle, Arie Zaban

Research output: Contribution to journalArticlepeer-review

66 Scopus citations


Type II dye-sensitized solar cells (DSSCs) differ from conventional DSSCs by their mechanism of light absorption and electron injection. Instead of photoexcitation of the dye, followed by electron injection to the semiconductor conduction band, in type II DSSCs, there is a direct electron injection from the HOMO level of the sensitizer into the conduction band of the semiconductor. The main drawback of such cells is their extremely rapid back-electron-transfer rate. Herein, we present a new approach for inhibiting back electron transfer in a catechol-sensitized type II DSSC using a thin layer barrier coating of SrTiO3 between the semiconductor and the sensitizer. A 70% improvement in charge collection efficiency is reported. A proposed mechanism for the operation of the SrTiO3 barrier layer is presented.

Original languageEnglish
Pages (from-to)10015-10018
Number of pages4
JournalJournal of Physical Chemistry C
Issue number21
StatePublished - 3 Jun 2010
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • General Energy
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films


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