Enhanced power conversion efficiency of dye-sensitized solar cells with multifunctional photoanodes based on a three-dimensional TiO2 nanohelix array

Seung Hee Lee, Jeong Kwon, Dong Yeong Kim, Kyung Song, Sang Ho Oh, Jaehee Cho, E. Fred Schubert, Jong Hyeok Park, Jong Kyu Kim

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Developments of metal oxide nanostructures for simultaneous improvements in light harvesting and charge collection can lead to a significant technical progress in various applications such as photoelectrodes for photoelectrochemical cells and various types of solar cells. Here we present an array of three-dimensional titanium dioxide (TiO2) nanohelixes infiltrated with TiO2 nanoparticles as a multifunctional photoanode for dye sensitized solar cells (DSSCs). The unique geometry and the near-single crystallinity of the vertically aligned TiO2 nanohelix array results simultaneously in strong light scattering and enhanced carrier transport and collection, while maintaining a comparable surface area accessible for dye molecules by the infiltrated TiO2 nanoparticles. Consequently, despite a ~40% reduction in dye loading, the overall photon conversion efficiency of the DSSC with the nanoparticle-infiltrated nanohelix-array photoanode is enhanced by 6.2% in comparison with the DSSC with the conventional nanoparticle photoanode.

Original languageEnglish
Pages (from-to)47-55
Number of pages9
JournalSolar Energy Materials and Solar Cells
Volume132
DOIs
Publication statusPublished - 2015 Jan

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Conversion efficiency
Nanoparticles
Coloring Agents
Dyes
Photoelectrochemical cells
Carrier transport
Light scattering
Titanium dioxide
Oxides
Nanostructures
Solar cells
Photons
Metals
Molecules
Geometry
Dye-sensitized solar cells

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films

Cite this

Lee, Seung Hee ; Kwon, Jeong ; Kim, Dong Yeong ; Song, Kyung ; Oh, Sang Ho ; Cho, Jaehee ; Schubert, E. Fred ; Park, Jong Hyeok ; Kim, Jong Kyu. / Enhanced power conversion efficiency of dye-sensitized solar cells with multifunctional photoanodes based on a three-dimensional TiO2 nanohelix array. In: Solar Energy Materials and Solar Cells. 2015 ; Vol. 132. pp. 47-55.
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Enhanced power conversion efficiency of dye-sensitized solar cells with multifunctional photoanodes based on a three-dimensional TiO2 nanohelix array. / Lee, Seung Hee; Kwon, Jeong; Kim, Dong Yeong; Song, Kyung; Oh, Sang Ho; Cho, Jaehee; Schubert, E. Fred; Park, Jong Hyeok; Kim, Jong Kyu.

In: Solar Energy Materials and Solar Cells, Vol. 132, 01.2015, p. 47-55.

Research output: Contribution to journalArticle

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AU - Lee, Seung Hee

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AU - Song, Kyung

AU - Oh, Sang Ho

AU - Cho, Jaehee

AU - Schubert, E. Fred

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AU - Kim, Jong Kyu

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