UV-reduction of graphene oxide and its application as an interfacial layer to reduce the back-transport reactions in dye-sensitized solar cells

Sung Ryong Kim, Md Khaled Parvez, Manish Chhowalla

Research output: Contribution to journalArticle

209 Citations (Scopus)

Abstract

A mixture of graphene oxide (GO) and TiO2 nanocomposites was reduced photocatalytically by UV-irradiation and applied as interfacial layer between a fluorine doped tin oxide (FTO) layer and a nanocrystalline TiO2 film. Impedance spectra implied a decreased back-transport reaction of electrons. The graphene-TiO2 interfacial layer effectively reduced the contact between I3- ions in the electrolyte and FTO layer, which inhibited back-transport reaction. The introduction of graphene-TiO2 increased Voc by 54 mV and the photoconversion efficiency was improved from 4.89% to 5.26%.

Original languageEnglish
Pages (from-to)124-127
Number of pages4
JournalChemical Physics Letters
Volume483
Issue number1-3
DOIs
Publication statusPublished - Dec 21 2009

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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