Preparation of Vertically Aligned ZnO/TiO2 Core-Shell Composites for Dye-Sensitized Solar Cells
Vertically aligned ZnO/TiO2 (VA-ZnO/TiO2) core-shell composites deposited on ZnO-seeded indium tin oxide (ITO) glasses have been synthesized by a chemical bath deposition approach for growing one-dimensional ZnO structure followed by a spin procedure for coating TiO2 on the surface of ZnO structure....
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2013-01-01
|
| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2013/417964 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832568087374725120 |
|---|---|
| author | Lung-Chuan Chen Shuei-Feng Tsai Jean-Hong Chen Gaun-Wen Wang |
| author_facet | Lung-Chuan Chen Shuei-Feng Tsai Jean-Hong Chen Gaun-Wen Wang |
| author_sort | Lung-Chuan Chen |
| collection | DOAJ |
| description | Vertically aligned ZnO/TiO2 (VA-ZnO/TiO2) core-shell composites deposited on ZnO-seeded indium tin oxide (ITO) glasses have been synthesized by a chemical bath deposition approach for growing one-dimensional ZnO structure followed by a spin procedure for coating TiO2 on the surface of ZnO structure. The influences of the cycles of spin coating of TiO2 (CSCT) on the properties of VA-ZnO/TiO2 and performances of the assembled DSSCs were studied. The power conversion efficiency of the VA-ZnO/TiO2-based DSSC measured under illumination of 100 mW/cm2 and AM 1.5 can reach 0.81%, representing 93% improvement when compared with that of the pristine VA-ZnO electrode (0.42%). The intensity-modulated photocurrent spectroscopy (IMPS) and electrochemical impedance spectroscopy (EIS) were applied to study the kinetics and interfacial transfer of the photogenerated electrons. Both the photocurrent and power conversion efficiency correlate well with the steady state electron density. Enlargement in surface area and dye adsorption, suppression of dissolution of Zn2+, diminishment in electron recombination, and fast transfer of injected electrons from excited dyes to TiO2 conduction bands arising from coating TiO2 on VA-ZnO are regarded as the predominant causes for this improvement. |
| format | Article |
| id | doaj-art-8bd9811e9c624623bea2f83550edb137 |
| institution | Kabale University |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-8bd9811e9c624623bea2f83550edb1372025-02-03T00:59:49ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2013-01-01201310.1155/2013/417964417964Preparation of Vertically Aligned ZnO/TiO2 Core-Shell Composites for Dye-Sensitized Solar CellsLung-Chuan Chen0Shuei-Feng Tsai1Jean-Hong Chen2Gaun-Wen Wang3Department of Materials Engineering, Kun-Shan University, Yung Kang, Tainan 710, TaiwanDepartment of Materials Engineering, Kun-Shan University, Yung Kang, Tainan 710, TaiwanDepartment of Materials Engineering, Kun-Shan University, Yung Kang, Tainan 710, TaiwanDepartment of Materials Engineering, Kun-Shan University, Yung Kang, Tainan 710, TaiwanVertically aligned ZnO/TiO2 (VA-ZnO/TiO2) core-shell composites deposited on ZnO-seeded indium tin oxide (ITO) glasses have been synthesized by a chemical bath deposition approach for growing one-dimensional ZnO structure followed by a spin procedure for coating TiO2 on the surface of ZnO structure. The influences of the cycles of spin coating of TiO2 (CSCT) on the properties of VA-ZnO/TiO2 and performances of the assembled DSSCs were studied. The power conversion efficiency of the VA-ZnO/TiO2-based DSSC measured under illumination of 100 mW/cm2 and AM 1.5 can reach 0.81%, representing 93% improvement when compared with that of the pristine VA-ZnO electrode (0.42%). The intensity-modulated photocurrent spectroscopy (IMPS) and electrochemical impedance spectroscopy (EIS) were applied to study the kinetics and interfacial transfer of the photogenerated electrons. Both the photocurrent and power conversion efficiency correlate well with the steady state electron density. Enlargement in surface area and dye adsorption, suppression of dissolution of Zn2+, diminishment in electron recombination, and fast transfer of injected electrons from excited dyes to TiO2 conduction bands arising from coating TiO2 on VA-ZnO are regarded as the predominant causes for this improvement.http://dx.doi.org/10.1155/2013/417964 |
| spellingShingle | Lung-Chuan Chen Shuei-Feng Tsai Jean-Hong Chen Gaun-Wen Wang Preparation of Vertically Aligned ZnO/TiO2 Core-Shell Composites for Dye-Sensitized Solar Cells International Journal of Photoenergy |
| title | Preparation of Vertically Aligned ZnO/TiO2 Core-Shell Composites for Dye-Sensitized Solar Cells |
| title_full | Preparation of Vertically Aligned ZnO/TiO2 Core-Shell Composites for Dye-Sensitized Solar Cells |
| title_fullStr | Preparation of Vertically Aligned ZnO/TiO2 Core-Shell Composites for Dye-Sensitized Solar Cells |
| title_full_unstemmed | Preparation of Vertically Aligned ZnO/TiO2 Core-Shell Composites for Dye-Sensitized Solar Cells |
| title_short | Preparation of Vertically Aligned ZnO/TiO2 Core-Shell Composites for Dye-Sensitized Solar Cells |
| title_sort | preparation of vertically aligned zno tio2 core shell composites for dye sensitized solar cells |
| url | http://dx.doi.org/10.1155/2013/417964 |
| work_keys_str_mv | AT lungchuanchen preparationofverticallyalignedznotio2coreshellcompositesfordyesensitizedsolarcells AT shueifengtsai preparationofverticallyalignedznotio2coreshellcompositesfordyesensitizedsolarcells AT jeanhongchen preparationofverticallyalignedznotio2coreshellcompositesfordyesensitizedsolarcells AT gaunwenwang preparationofverticallyalignedznotio2coreshellcompositesfordyesensitizedsolarcells |