Efficiency improvement of dye-sensitized solar cells using graft copolymer-templated mesoporous TiO2 films as an interfacial layer

Sung Hoon Ahn, Harim Jeon, Kyung Jin Son, Hyungju Ahn, Won-Gun Koh, Du Yeol Ryu, Jong Hak Kim

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

Organized mesoporous TiO2 films with high porosity and good connectivity were synthesized via sol-gel by templating an amphiphilic graft copolymer consisting of poly(vinyl chloride) backbone and poly(oxyethylene methacrylate) side chains, i.e., PVC-g-POEM. The randomly microphase-separated graft copolymer was self-reorganized to exhibit a well-ordered micellar morphology upon controlling polymer-solvent interactions, as confirmed by atomic force microscope (AFM) and glazing incidence small-angle X-ray scattering (GISAXS). These organized mesoporous TiO2 films, 550 nm in thickness, were used an an interfacial layer between a nanocrystalline TiO2 thick layer and a conducting glass in dye-sensitized solar cells (DSSC). Introduction of the organized mesoporous TiO2 layer resulted in the increased transmittance of visible light, decreased interfacial resistance and enhanced electron lifetime. As a result, an energy conversion efficiency of DSSC employing polymer electrolyte was significantly improved from 3.5% to 5.0% at 100 mW cm-2.

Original languageEnglish
Pages (from-to)1772-1779
Number of pages8
JournalJournal of Materials Chemistry
Volume21
Issue number6
DOIs
Publication statusPublished - 2011 Feb 14

Fingerprint

Graft copolymers
Polymers
Vinyl Chloride
Methacrylates
X ray scattering
Energy conversion
Polyvinyl chlorides
Electrolytes
Conversion efficiency
Sol-gels
Microscopes
Porosity
Glass
Electrons
Dye-sensitized solar cells
poly(vinyl chloride)-g-poly(oxyethylene methacrylate)

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

Cite this

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abstract = "Organized mesoporous TiO2 films with high porosity and good connectivity were synthesized via sol-gel by templating an amphiphilic graft copolymer consisting of poly(vinyl chloride) backbone and poly(oxyethylene methacrylate) side chains, i.e., PVC-g-POEM. The randomly microphase-separated graft copolymer was self-reorganized to exhibit a well-ordered micellar morphology upon controlling polymer-solvent interactions, as confirmed by atomic force microscope (AFM) and glazing incidence small-angle X-ray scattering (GISAXS). These organized mesoporous TiO2 films, 550 nm in thickness, were used an an interfacial layer between a nanocrystalline TiO2 thick layer and a conducting glass in dye-sensitized solar cells (DSSC). Introduction of the organized mesoporous TiO2 layer resulted in the increased transmittance of visible light, decreased interfacial resistance and enhanced electron lifetime. As a result, an energy conversion efficiency of DSSC employing polymer electrolyte was significantly improved from 3.5{\%} to 5.0{\%} at 100 mW cm-2.",
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Efficiency improvement of dye-sensitized solar cells using graft copolymer-templated mesoporous TiO2 films as an interfacial layer. / Ahn, Sung Hoon; Jeon, Harim; Son, Kyung Jin; Ahn, Hyungju; Koh, Won-Gun; Ryu, Du Yeol; Kim, Jong Hak.

In: Journal of Materials Chemistry, Vol. 21, No. 6, 14.02.2011, p. 1772-1779.

Research output: Contribution to journalArticle

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AU - Son, Kyung Jin

AU - Ahn, Hyungju

AU - Koh, Won-Gun

AU - Ryu, Du Yeol

AU - Kim, Jong Hak

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AB - Organized mesoporous TiO2 films with high porosity and good connectivity were synthesized via sol-gel by templating an amphiphilic graft copolymer consisting of poly(vinyl chloride) backbone and poly(oxyethylene methacrylate) side chains, i.e., PVC-g-POEM. The randomly microphase-separated graft copolymer was self-reorganized to exhibit a well-ordered micellar morphology upon controlling polymer-solvent interactions, as confirmed by atomic force microscope (AFM) and glazing incidence small-angle X-ray scattering (GISAXS). These organized mesoporous TiO2 films, 550 nm in thickness, were used an an interfacial layer between a nanocrystalline TiO2 thick layer and a conducting glass in dye-sensitized solar cells (DSSC). Introduction of the organized mesoporous TiO2 layer resulted in the increased transmittance of visible light, decreased interfacial resistance and enhanced electron lifetime. As a result, an energy conversion efficiency of DSSC employing polymer electrolyte was significantly improved from 3.5% to 5.0% at 100 mW cm-2.

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