Dye stabilization and enhanced photoelectrode wettability in water-based dye-sensitized solar cells through post-assembly atomic layer deposition of TiO2

Ho Jin Son, Chaiya Prasittichai, Joseph E. Mondloch, Langli Luo, Jinsong Wu, Dong Wook Kim, Omar K. Farha, Joseph T. Hupp

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

Detachment (desorption) of molecular dyes from photoelectrodes is one of the major limitations for the long-term operation of dye-sensitized solar cells. Here we demonstrate a method to greatly inhibit this loss by growing a transparent metal oxide (TiO2) on the dye-coated photoelectrode via atomic layer deposition (ALD). TiO2-enshrouded sensitizers largely resist detachment, even in pH 10.7 ethanol, a standard solution for intentional removal of molecular dyes from photoelectrodes. Additionally, the ALD post-treatment renders the otherwise hydrophobic dye-coated surface hydrophilic, thereby enhancing photoelectrode pore-filling with aqueous solution.

Original languageEnglish
Pages (from-to)11529-11532
Number of pages4
JournalJournal of the American Chemical Society
Volume135
Issue number31
DOIs
Publication statusPublished - Aug 7 2013

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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