Ta doping for an enhanced efficiency of TiO 2 nanotube based dye-sensitized solar cells

Kiyoung Lee; Patrik Schmuki

doi:10.1016/j.elecom.2012.08.026

Ta doping for an enhanced efficiency of TiO ₂ nanotube based dye-sensitized solar cells

Kiyoung Lee, Patrik Schmuki

Friedrich-Alexander University Erlangen-Nürnberg

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

36 Scopus citations

Abstract

Ta doped TiO ₂ nanotube layers were fabricated by anodization of different Ti-Ta alloys with Ta contents of 0.03, 0.1 and 0.4 at.%. For all layers well defined nanotubular structures could be formed. The layers were then characterized in dye-sensitized solar cells. Under optimized conditions, that is for a 0.1 at.% Ta alloy, the solar cell efficiency could be enhanced by 25% compared to non-doped TiO ₂ nanotubes. Intensity modulated photocurrent spectra (IMPS) and intensity modulated photovoltage spectra (IMVS) measurements performed with the solar cells indicate that the beneficial effect is due to suppression of recombination effects.

Original language	English
Pages (from-to)	11-14
Number of pages	4
Journal	Electrochemistry Communications
Volume	25
Issue number	1
DOIs	https://doi.org/10.1016/j.elecom.2012.08.026
State	Published - Nov 2012
Externally published	Yes

Bibliographical note

Funding Information:
The authors would like to acknowledge DFG and the EAM-DFG Cluster of Excellence for financial support.

Keywords

Anodization
DSSCs
Doping
TiO nanotubes

Access to Document

10.1016/j.elecom.2012.08.026

Cite this

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title = "Ta doping for an enhanced efficiency of TiO 2 nanotube based dye-sensitized solar cells",

abstract = "Ta doped TiO 2 nanotube layers were fabricated by anodization of different Ti-Ta alloys with Ta contents of 0.03, 0.1 and 0.4 at.%. For all layers well defined nanotubular structures could be formed. The layers were then characterized in dye-sensitized solar cells. Under optimized conditions, that is for a 0.1 at.% Ta alloy, the solar cell efficiency could be enhanced by 25% compared to non-doped TiO 2 nanotubes. Intensity modulated photocurrent spectra (IMPS) and intensity modulated photovoltage spectra (IMVS) measurements performed with the solar cells indicate that the beneficial effect is due to suppression of recombination effects.",

keywords = "Anodization, DSSCs, Doping, TiO nanotubes",

author = "Kiyoung Lee and Patrik Schmuki",

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AU - Lee, Kiyoung

AU - Schmuki, Patrik

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PY - 2012/11

Y1 - 2012/11

N2 - Ta doped TiO 2 nanotube layers were fabricated by anodization of different Ti-Ta alloys with Ta contents of 0.03, 0.1 and 0.4 at.%. For all layers well defined nanotubular structures could be formed. The layers were then characterized in dye-sensitized solar cells. Under optimized conditions, that is for a 0.1 at.% Ta alloy, the solar cell efficiency could be enhanced by 25% compared to non-doped TiO 2 nanotubes. Intensity modulated photocurrent spectra (IMPS) and intensity modulated photovoltage spectra (IMVS) measurements performed with the solar cells indicate that the beneficial effect is due to suppression of recombination effects.

AB - Ta doped TiO 2 nanotube layers were fabricated by anodization of different Ti-Ta alloys with Ta contents of 0.03, 0.1 and 0.4 at.%. For all layers well defined nanotubular structures could be formed. The layers were then characterized in dye-sensitized solar cells. Under optimized conditions, that is for a 0.1 at.% Ta alloy, the solar cell efficiency could be enhanced by 25% compared to non-doped TiO 2 nanotubes. Intensity modulated photocurrent spectra (IMPS) and intensity modulated photovoltage spectra (IMVS) measurements performed with the solar cells indicate that the beneficial effect is due to suppression of recombination effects.

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