Surface Modification of Porous Photoelectrode Using Etching Process for Efficiency Enhancement of ZnO Dye-Sensitized Solar Cells
Surface modification of porous ZnO photoelectrode using one- and two-step etching process is investigated for enhancing power conversion efficiency of ZnO dye-sensitized solar cells. ZnO films are modified by the diluted NH4OH solutions for one-step etching process and used as photoelectrode of dye-...
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Series: | Journal of Nanomaterials |
Online Access: | http://dx.doi.org/10.1155/2016/7403019 |
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doaj-ed1e7e4783424e7ba5bc6c2990b916aa2020-11-24T23:58:11ZengHindawi LimitedJournal of Nanomaterials1687-41101687-41292016-01-01201610.1155/2016/74030197403019Surface Modification of Porous Photoelectrode Using Etching Process for Efficiency Enhancement of ZnO Dye-Sensitized Solar CellsSutthipoj Sutthana0Duangmanee Wongratanaphisan1Atcharawon Gardchareon2Surachet Phadungdhitidhada3Pipat Ruankham4Supab Choopun5Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, ThailandDepartment of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, ThailandDepartment of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, ThailandDepartment of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, ThailandDepartment of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, ThailandDepartment of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, ThailandSurface modification of porous ZnO photoelectrode using one- and two-step etching process is investigated for enhancing power conversion efficiency of ZnO dye-sensitized solar cells. ZnO films are modified by the diluted NH4OH solutions for one-step etching process and used as photoelectrode of dye-sensitized solar cells. Rough porous films are observed after one-step etching process. The fabricated cells based on the optimized one-step etched films show a significant increase in short-circuit current density. The short-circuit current density is directly changed with amount of dye adsorption, which is related to specific surface area. The etched films exhibit higher specific surface area over two times than nonetched films. Thus, the large specific surface area is the key success for increasing amount of dye adsorption. Internal electrochemical property of fabricated cells is also improved, indicating that chemical surface of ZnO films is modified in the same time. The DSSCs fabricated on two-step etched films with NH4OH and mixed acid HCl : HNO3 show the maximum power conversion efficiency of 2.26%. Moreover, fill factor is also increased due to better redox process because of the formation of fine porous structure during the etching process. Therefore, these results implied that the roles of etching processes are improving specific surface area and fine porous formation which can provide better dye adsorption and redox process for dye-sensitized solar cell application.http://dx.doi.org/10.1155/2016/7403019 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Sutthipoj Sutthana Duangmanee Wongratanaphisan Atcharawon Gardchareon Surachet Phadungdhitidhada Pipat Ruankham Supab Choopun |
spellingShingle |
Sutthipoj Sutthana Duangmanee Wongratanaphisan Atcharawon Gardchareon Surachet Phadungdhitidhada Pipat Ruankham Supab Choopun Surface Modification of Porous Photoelectrode Using Etching Process for Efficiency Enhancement of ZnO Dye-Sensitized Solar Cells Journal of Nanomaterials |
author_facet |
Sutthipoj Sutthana Duangmanee Wongratanaphisan Atcharawon Gardchareon Surachet Phadungdhitidhada Pipat Ruankham Supab Choopun |
author_sort |
Sutthipoj Sutthana |
title |
Surface Modification of Porous Photoelectrode Using Etching Process for Efficiency Enhancement of ZnO Dye-Sensitized Solar Cells |
title_short |
Surface Modification of Porous Photoelectrode Using Etching Process for Efficiency Enhancement of ZnO Dye-Sensitized Solar Cells |
title_full |
Surface Modification of Porous Photoelectrode Using Etching Process for Efficiency Enhancement of ZnO Dye-Sensitized Solar Cells |
title_fullStr |
Surface Modification of Porous Photoelectrode Using Etching Process for Efficiency Enhancement of ZnO Dye-Sensitized Solar Cells |
title_full_unstemmed |
Surface Modification of Porous Photoelectrode Using Etching Process for Efficiency Enhancement of ZnO Dye-Sensitized Solar Cells |
title_sort |
surface modification of porous photoelectrode using etching process for efficiency enhancement of zno dye-sensitized solar cells |
publisher |
Hindawi Limited |
series |
Journal of Nanomaterials |
issn |
1687-4110 1687-4129 |
publishDate |
2016-01-01 |
description |
Surface modification of porous ZnO photoelectrode using one- and two-step etching process is investigated for enhancing power conversion efficiency of ZnO dye-sensitized solar cells. ZnO films are modified by the diluted NH4OH solutions for one-step etching process and used as photoelectrode of dye-sensitized solar cells. Rough porous films are observed after one-step etching process. The fabricated cells based on the optimized one-step etched films show a significant increase in short-circuit current density. The short-circuit current density is directly changed with amount of dye adsorption, which is related to specific surface area. The etched films exhibit higher specific surface area over two times than nonetched films. Thus, the large specific surface area is the key success for increasing amount of dye adsorption. Internal electrochemical property of fabricated cells is also improved, indicating that chemical surface of ZnO films is modified in the same time. The DSSCs fabricated on two-step etched films with NH4OH and mixed acid HCl : HNO3 show the maximum power conversion efficiency of 2.26%. Moreover, fill factor is also increased due to better redox process because of the formation of fine porous structure during the etching process. Therefore, these results implied that the roles of etching processes are improving specific surface area and fine porous formation which can provide better dye adsorption and redox process for dye-sensitized solar cell application. |
url |
http://dx.doi.org/10.1155/2016/7403019 |
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