Characteristics of Boron Decorated TiO2 Nanoparticles for Dye-Sensitized Solar Cell Photoanode
Different boron weight percents on mixed-phase (anatase and rutile) TiO2 nanoparticles were synthesized to investigate structure morphology, defect states, luminescence properties, and energy conversion. The measured results indicate that boron doping of TiO2 both increases the crystallite size and...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2015/689702 |
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| author | Ching-Yuan Ho J. K. Lin Hong-Wen Wang |
| author_facet | Ching-Yuan Ho J. K. Lin Hong-Wen Wang |
| author_sort | Ching-Yuan Ho |
| collection | DOAJ |
| description | Different boron weight percents on mixed-phase (anatase and rutile) TiO2 nanoparticles were synthesized to investigate structure morphology, defect states, luminescence properties, and energy conversion. The measured results indicate that boron doping of TiO2 both increases the crystallite size and rutile-phase percent in an anatase matrix. Decreasing the band gap by boron doping can extend the absorption to the visible region, while undoped TiO2 exhibits high UV absorption. Oxygen vacancy defects generated by boron ions reduce Ti+4 and affect electron transport in dye-sensitized solar cells. Excess electrons originating from the oxygen vacancies of doped TiO2 downward shift in the conduction band edge and prompt the transfer of photoelectrons from the conduction band of the rutile phase to the lower energy anatase trapping sites; they then separate charges to enhance the photocurrent and Jsc. Although the resistance of the electron recombination (Rk) between doped TiO2 photoanode and the electrolyte for the doped TiO2 sample is lower, a longer electron lifetime (τ) of 19.7 ms with a higher electron density (ns) of 2.1 × 1018 cm−3 contributes to high solar conversion efficiency. |
| format | Article |
| id | doaj-art-63bc02b1c8cf47a889aac2ad528290de |
| institution | Kabale University |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-63bc02b1c8cf47a889aac2ad528290de2025-02-03T01:20:15ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2015-01-01201510.1155/2015/689702689702Characteristics of Boron Decorated TiO2 Nanoparticles for Dye-Sensitized Solar Cell PhotoanodeChing-Yuan Ho0J. K. Lin1Hong-Wen Wang2Department of Mechanical Engineering, Chung Yuan Christian University, Chung-Li 32023, TaiwanDepartment of Mechanical Engineering, Chung Yuan Christian University, Chung-Li 32023, TaiwanDepartment of Chemistry, Center for Nanotechnology and Institute of Biomedical Technology, Chung Yuan Christian University CYCU, Chung-Li 32023, TaiwanDifferent boron weight percents on mixed-phase (anatase and rutile) TiO2 nanoparticles were synthesized to investigate structure morphology, defect states, luminescence properties, and energy conversion. The measured results indicate that boron doping of TiO2 both increases the crystallite size and rutile-phase percent in an anatase matrix. Decreasing the band gap by boron doping can extend the absorption to the visible region, while undoped TiO2 exhibits high UV absorption. Oxygen vacancy defects generated by boron ions reduce Ti+4 and affect electron transport in dye-sensitized solar cells. Excess electrons originating from the oxygen vacancies of doped TiO2 downward shift in the conduction band edge and prompt the transfer of photoelectrons from the conduction band of the rutile phase to the lower energy anatase trapping sites; they then separate charges to enhance the photocurrent and Jsc. Although the resistance of the electron recombination (Rk) between doped TiO2 photoanode and the electrolyte for the doped TiO2 sample is lower, a longer electron lifetime (τ) of 19.7 ms with a higher electron density (ns) of 2.1 × 1018 cm−3 contributes to high solar conversion efficiency.http://dx.doi.org/10.1155/2015/689702 |
| spellingShingle | Ching-Yuan Ho J. K. Lin Hong-Wen Wang Characteristics of Boron Decorated TiO2 Nanoparticles for Dye-Sensitized Solar Cell Photoanode International Journal of Photoenergy |
| title | Characteristics of Boron Decorated TiO2 Nanoparticles for Dye-Sensitized Solar Cell Photoanode |
| title_full | Characteristics of Boron Decorated TiO2 Nanoparticles for Dye-Sensitized Solar Cell Photoanode |
| title_fullStr | Characteristics of Boron Decorated TiO2 Nanoparticles for Dye-Sensitized Solar Cell Photoanode |
| title_full_unstemmed | Characteristics of Boron Decorated TiO2 Nanoparticles for Dye-Sensitized Solar Cell Photoanode |
| title_short | Characteristics of Boron Decorated TiO2 Nanoparticles for Dye-Sensitized Solar Cell Photoanode |
| title_sort | characteristics of boron decorated tio2 nanoparticles for dye sensitized solar cell photoanode |
| url | http://dx.doi.org/10.1155/2015/689702 |
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