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

doi:10.1016/j.solmat.2014.08.007

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

Department of Chemical and Biomolecular Engineering

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

27 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 language	English
Pages (from-to)	47-55
Number of pages	9
Journal	Solar Energy Materials and Solar Cells
Volume	132
DOIs	https://doi.org/10.1016/j.solmat.2014.08.007
Publication status	Published - 2015 Jan

Bibliographical note

Funding Information:
Seung Hee Lee and Jeong Kwon contributed equally to this work. The authors gratefully acknowledge supports by Global Research Network program ( 2011-220-D00064 ) funded by the National Research Foundation of Korea (NRF) , and by POSCO Fusion Technology Center for Materials .

Publisher Copyright:
© 2014 Elsevier B.V.

All Science Journal Classification (ASJC) codes

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

UN SDGs

This output contributes to the following Sustainable Development Goal(s)

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

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.",

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note = "Funding Information: Seung Hee Lee and Jeong Kwon contributed equally to this work. The authors gratefully acknowledge supports by Global Research Network program ( 2011-220-D00064 ) funded by the National Research Foundation of Korea (NRF) , and by POSCO Fusion Technology Center for Materials . Publisher Copyright: {\textcopyright} 2014 Elsevier B.V.",

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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 journal › Article › peer-review

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AU - Kim, Jong Kyu

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