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

192 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 - 2009

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Graphite
Oxides
graphene
Fluorine
solar cells
dyes
oxides
tin oxides
fluorine
Electrolytes
Nanocomposites
Irradiation
Ions
nanocomposites
Electrons
electrolytes
impedance
irradiation
Dye-sensitized solar cells
ions

ASJC Scopus subject areas

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

Cite this

UV-reduction of graphene oxide and its application as an interfacial layer to reduce the back-transport reactions in dye-sensitized solar cells. / Kim, Sung Ryong; Parvez, Md Khaled; Chhowalla, Manish.

In: Chemical Physics Letters, Vol. 483, No. 1-3, 2009, p. 124-127.

Research output: Contribution to journalArticle

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