ZnO-Nanorod Dye-Sensitized Solar Cells: New Structure without a Transparent Conducting Oxide Layer
Conventional nanorod-based dye-sensitized solar cells (DSSCs) are fabricated by growing nanorods on top of a transparent conducting oxide (TCO, typically fluorine-doped tin oxide—FTO). The heterogeneous interface between the nanorod and TCO forms a source for carrier scattering. This work reports on...
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doaj-87333f988ce84963bd7db1cd014bd59e2020-11-24T20:48:55ZengHindawi LimitedInternational Journal of Photoenergy1110-662X1687-529X2010-01-01201010.1155/2010/497095497095ZnO-Nanorod Dye-Sensitized Solar Cells: New Structure without a Transparent Conducting Oxide LayerMing-Hong Lai0Auttasit Tubtimtae1Ming-Way Lee2Gou-Jen Wang3Department of Physics, Institute of Nanoscience, National Chung Hsing University, Taichung 402, TaiwanDepartment of Physics, Institute of Nanoscience, National Chung Hsing University, Taichung 402, TaiwanDepartment of Physics, Institute of Nanoscience, National Chung Hsing University, Taichung 402, TaiwanDepartment of Mechanical Engineering, National Chung Hsing University, Taichung 402, TaiwanConventional nanorod-based dye-sensitized solar cells (DSSCs) are fabricated by growing nanorods on top of a transparent conducting oxide (TCO, typically fluorine-doped tin oxide—FTO). The heterogeneous interface between the nanorod and TCO forms a source for carrier scattering. This work reports on a new DSSC architecture without a TCO layer. The TCO-less structure consists of ZnO nanorods grown on top of a ZnO film. The ZnO film replaced FTO as the TCO layer and the ZnO nanorods served as the photoanode. The ZnO nanorod/film structure was grown by two methods: (1) one-step chemical vapor deposition (CVD) (2) two-step chemical bath deposition (CBD). The thicknesses of the nanorods/film grown by CVD is more uniform than that by CBD. We demonstrate that the TCO-less DSSC structure can operate properly as solar cells. The new DSSCs yield the best short-current density of 3.96 mA/cm2 and a power conversion efficiency of 0.73% under 85 mW/cm2 of simulated solar illumination. The open-circuit voltage of 0.80 V is markedly higher than that from conventional ZnO DSSCs.http://dx.doi.org/10.1155/2010/497095 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Ming-Hong Lai Auttasit Tubtimtae Ming-Way Lee Gou-Jen Wang |
spellingShingle |
Ming-Hong Lai Auttasit Tubtimtae Ming-Way Lee Gou-Jen Wang ZnO-Nanorod Dye-Sensitized Solar Cells: New Structure without a Transparent Conducting Oxide Layer International Journal of Photoenergy |
author_facet |
Ming-Hong Lai Auttasit Tubtimtae Ming-Way Lee Gou-Jen Wang |
author_sort |
Ming-Hong Lai |
title |
ZnO-Nanorod Dye-Sensitized Solar Cells: New Structure without a Transparent Conducting Oxide Layer |
title_short |
ZnO-Nanorod Dye-Sensitized Solar Cells: New Structure without a Transparent Conducting Oxide Layer |
title_full |
ZnO-Nanorod Dye-Sensitized Solar Cells: New Structure without a Transparent Conducting Oxide Layer |
title_fullStr |
ZnO-Nanorod Dye-Sensitized Solar Cells: New Structure without a Transparent Conducting Oxide Layer |
title_full_unstemmed |
ZnO-Nanorod Dye-Sensitized Solar Cells: New Structure without a Transparent Conducting Oxide Layer |
title_sort |
zno-nanorod dye-sensitized solar cells: new structure without a transparent conducting oxide layer |
publisher |
Hindawi Limited |
series |
International Journal of Photoenergy |
issn |
1110-662X 1687-529X |
publishDate |
2010-01-01 |
description |
Conventional nanorod-based dye-sensitized solar cells (DSSCs) are fabricated by growing nanorods on top of a transparent conducting oxide (TCO, typically fluorine-doped tin oxide—FTO). The heterogeneous interface between the nanorod and TCO forms a source for carrier scattering. This work reports on a new DSSC architecture without a TCO layer. The TCO-less structure consists of ZnO nanorods grown on top of a ZnO film. The ZnO film replaced FTO as the TCO layer and the ZnO nanorods served as the photoanode. The ZnO nanorod/film structure was grown by two methods: (1) one-step chemical vapor deposition (CVD) (2) two-step chemical bath deposition (CBD). The thicknesses of the nanorods/film grown by CVD is more uniform than that by CBD. We demonstrate that the TCO-less DSSC structure can operate properly as solar cells. The new DSSCs yield the best short-current density of 3.96 mA/cm2 and a power conversion efficiency of 0.73% under 85 mW/cm2 of simulated solar illumination. The open-circuit voltage of 0.80 V is markedly higher than that from conventional ZnO DSSCs. |
url |
http://dx.doi.org/10.1155/2010/497095 |
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