Enhanced charge transport properties of dye-sensitized solar cells using TiNxOy nanostructure composite photoanode
In this Article, the improvement in the conversion efficiencies of dye-sensitized solar cells (DSSCs) was observed by integrating a small amount of thermally oxidized titanium nitride (TiNxOy) particles into the hydrothermally growth TiO2 nanoparticles to form the composite photoanode. The oxidation...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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2013
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| Online Access: | https://hdl.handle.net/10356/99063 http://hdl.handle.net/10220/17088 |
| _version_ | 1824457020698263552 |
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| author | Lim, Chiew Keat Huang, Hui Chow, Chee Lap Tan, Pei Yun Chen, Xiaofeng Tse, Man Siu Tan, Ooi Kiang |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Lim, Chiew Keat Huang, Hui Chow, Chee Lap Tan, Pei Yun Chen, Xiaofeng Tse, Man Siu Tan, Ooi Kiang |
| author_sort | Lim, Chiew Keat |
| collection | NTU |
| description | In this Article, the improvement in the conversion efficiencies of dye-sensitized solar cells (DSSCs) was observed by integrating a small amount of thermally oxidized titanium nitride (TiNxOy) particles into the hydrothermally growth TiO2 nanoparticles to form the composite photoanode. The oxidation of titanium nitride (TiN) to TiNxOy (N-doped TiO2) was achieved using a simple single-step annealing process at 450 °C for 1 h. The existence of the O–Ti–N linkage in TiNxOy was verified using X-ray photoemission spectroscopy (XPS). The DSSCs using the composite photoanode with 5 wt % of TiNxOy particles in TiO2 showed optimum conversion efficiency with a 25.6% improvement over the conventional DSSCs using only the mesoporous TiO2 layer as photoanode. Higher incident photon-current conversion efficiency (IPCE) values were also obtained for these composite photoanodes. This marked improvement was attributed to the combined synergetic effects of an extra absorption in the visible region and an enhanced efficiency in the electron transport. The extra absorption region at 400–500 nm for TiNxOy was observed using a UV–vis spectrophotometer. In addition, the reduction of charge transport resistance in the composite photoanode as verified using electrochemical impedance spectroscopy (EIS) has also contributed to faster electron transport through the interpenetrating oxide layer. |
| first_indexed | 2025-02-19T04:03:22Z |
| format | Journal Article |
| id | ntu-10356/99063 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T04:03:22Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/990632020-03-07T14:00:30Z Enhanced charge transport properties of dye-sensitized solar cells using TiNxOy nanostructure composite photoanode Lim, Chiew Keat Huang, Hui Chow, Chee Lap Tan, Pei Yun Chen, Xiaofeng Tse, Man Siu Tan, Ooi Kiang School of Electrical and Electronic Engineering A*STAR SIMTech DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics In this Article, the improvement in the conversion efficiencies of dye-sensitized solar cells (DSSCs) was observed by integrating a small amount of thermally oxidized titanium nitride (TiNxOy) particles into the hydrothermally growth TiO2 nanoparticles to form the composite photoanode. The oxidation of titanium nitride (TiN) to TiNxOy (N-doped TiO2) was achieved using a simple single-step annealing process at 450 °C for 1 h. The existence of the O–Ti–N linkage in TiNxOy was verified using X-ray photoemission spectroscopy (XPS). The DSSCs using the composite photoanode with 5 wt % of TiNxOy particles in TiO2 showed optimum conversion efficiency with a 25.6% improvement over the conventional DSSCs using only the mesoporous TiO2 layer as photoanode. Higher incident photon-current conversion efficiency (IPCE) values were also obtained for these composite photoanodes. This marked improvement was attributed to the combined synergetic effects of an extra absorption in the visible region and an enhanced efficiency in the electron transport. The extra absorption region at 400–500 nm for TiNxOy was observed using a UV–vis spectrophotometer. In addition, the reduction of charge transport resistance in the composite photoanode as verified using electrochemical impedance spectroscopy (EIS) has also contributed to faster electron transport through the interpenetrating oxide layer. 2013-10-31T01:25:48Z 2019-12-06T20:02:49Z 2013-10-31T01:25:48Z 2019-12-06T20:02:49Z 2012 2012 Journal Article Lim, C. K., Huang, H., Chow, C. L., Tan, P. Y., Chen, X., Tse, M. S., et al. (2012). Enhanced charge transport properties of dye-sensitized solar cells using TiNxOy nanostructure composite photoanode. The journal of physical chemistry C, 116(37), 19659-19664. https://hdl.handle.net/10356/99063 http://hdl.handle.net/10220/17088 10.1021/jp304387c en The journal of physical chemistry C |
| spellingShingle | DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics Lim, Chiew Keat Huang, Hui Chow, Chee Lap Tan, Pei Yun Chen, Xiaofeng Tse, Man Siu Tan, Ooi Kiang Enhanced charge transport properties of dye-sensitized solar cells using TiNxOy nanostructure composite photoanode |
| title | Enhanced charge transport properties of dye-sensitized solar cells using TiNxOy nanostructure composite photoanode |
| title_full | Enhanced charge transport properties of dye-sensitized solar cells using TiNxOy nanostructure composite photoanode |
| title_fullStr | Enhanced charge transport properties of dye-sensitized solar cells using TiNxOy nanostructure composite photoanode |
| title_full_unstemmed | Enhanced charge transport properties of dye-sensitized solar cells using TiNxOy nanostructure composite photoanode |
| title_short | Enhanced charge transport properties of dye-sensitized solar cells using TiNxOy nanostructure composite photoanode |
| title_sort | enhanced charge transport properties of dye sensitized solar cells using tinxoy nanostructure composite photoanode |
| topic | DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics |
| url | https://hdl.handle.net/10356/99063 http://hdl.handle.net/10220/17088 |
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