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

doi:10.1016/j.cplett.2009.10.066

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

School of Engineering, Materials Science & Engineering

Research output: Contribution to journal › Article › peer-review

248 Scopus citations

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 V_oc by 54 mV and the photoconversion efficiency was improved from 4.89% to 5.26%.

Original language	English (US)
Pages (from-to)	124-127
Number of pages	4
Journal	Chemical Physics Letters
Volume	483
Issue number	1-3
DOIs	https://doi.org/10.1016/j.cplett.2009.10.066
State	Published - 2009

All Science Journal Classification (ASJC) codes

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1016/j.cplett.2009.10.066

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

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%.",

author = "Kim, {Sung Ryong} and Parvez, {Md Khaled} and Manish Chhowalla",

note = "Funding Information: This research was supported by a grant from the University Restructuring Program (funded by the Ministry of Education and Human Resources Development) of Chungju National University. Also, this work was supported by a grant from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy, Republic of Korea . ",

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doi = "10.1016/j.cplett.2009.10.066",

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AU - Parvez, Md Khaled

AU - Chhowalla, Manish

N1 - Funding Information: This research was supported by a grant from the University Restructuring Program (funded by the Ministry of Education and Human Resources Development) of Chungju National University. Also, this work was supported by a grant from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy, Republic of Korea .

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Y1 - 2009

N2 - 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%.

AB - 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%.

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

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