Crystalline TiO2 protective layer with graded oxygen defects for efficient and stable silicon-based photocathode
© 2018, The Author(s). The trade-offs between photoelectrode efficiency and stability significantly hinder the practical application of silicon-based photoelectrochemical devices. Here, we report a facile approach to decouple the trade-offs of silicon-based photocathodes by employing crystalline TiO...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Published: |
Macmillan Publishers Limited
2018
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| Online Access: | http://purl.org/au-research/grants/arc/DP180100568 http://hdl.handle.net/20.500.11937/71373 |
| _version_ | 1848762462568972288 |
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| author | Zheng, Jianyun Lyu, Yanhong Wang, R. Xie, C. Zhou, H. Jiang, San Ping Wang, S. |
| author_facet | Zheng, Jianyun Lyu, Yanhong Wang, R. Xie, C. Zhou, H. Jiang, San Ping Wang, S. |
| author_sort | Zheng, Jianyun |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2018, The Author(s). The trade-offs between photoelectrode efficiency and stability significantly hinder the practical application of silicon-based photoelectrochemical devices. Here, we report a facile approach to decouple the trade-offs of silicon-based photocathodes by employing crystalline TiO2 with graded oxygen defects as protection layer. The crystalline protection layer provides high-density structure and enhances stability, and at the same time oxygen defects allow the carrier transport with low resistance as required for high efficiency. The silicon-based photocathode with black TiO2 shows a limiting current density of ~35.3 mA cm-2 and durability of over 100 h at 10 mA cm-2 in 1.0 M NaOH electrolyte, while none of photoelectrochemical behavior is observed in crystalline TiO2 protection layer. These findings have significant suggestions for further development of silicon-based, III–V compounds and other photoelectrodes and offer the possibility for achieving highly efficient and durable photoelectrochemical devices. |
| first_indexed | 2025-11-14T10:47:57Z |
| format | Journal Article |
| id | curtin-20.500.11937-71373 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:47:57Z |
| publishDate | 2018 |
| publisher | Macmillan Publishers Limited |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-713732022-10-27T07:24:31Z Crystalline TiO2 protective layer with graded oxygen defects for efficient and stable silicon-based photocathode Zheng, Jianyun Lyu, Yanhong Wang, R. Xie, C. Zhou, H. Jiang, San Ping Wang, S. © 2018, The Author(s). The trade-offs between photoelectrode efficiency and stability significantly hinder the practical application of silicon-based photoelectrochemical devices. Here, we report a facile approach to decouple the trade-offs of silicon-based photocathodes by employing crystalline TiO2 with graded oxygen defects as protection layer. The crystalline protection layer provides high-density structure and enhances stability, and at the same time oxygen defects allow the carrier transport with low resistance as required for high efficiency. The silicon-based photocathode with black TiO2 shows a limiting current density of ~35.3 mA cm-2 and durability of over 100 h at 10 mA cm-2 in 1.0 M NaOH electrolyte, while none of photoelectrochemical behavior is observed in crystalline TiO2 protection layer. These findings have significant suggestions for further development of silicon-based, III–V compounds and other photoelectrodes and offer the possibility for achieving highly efficient and durable photoelectrochemical devices. 2018 Journal Article http://hdl.handle.net/20.500.11937/71373 10.1038/s41467-018-05580-z http://purl.org/au-research/grants/arc/DP180100568 http://creativecommons.org/licenses/by/4.0/ Macmillan Publishers Limited fulltext |
| spellingShingle | Zheng, Jianyun Lyu, Yanhong Wang, R. Xie, C. Zhou, H. Jiang, San Ping Wang, S. Crystalline TiO2 protective layer with graded oxygen defects for efficient and stable silicon-based photocathode |
| title | Crystalline TiO2 protective layer with graded oxygen defects for efficient and stable silicon-based photocathode |
| title_full | Crystalline TiO2 protective layer with graded oxygen defects for efficient and stable silicon-based photocathode |
| title_fullStr | Crystalline TiO2 protective layer with graded oxygen defects for efficient and stable silicon-based photocathode |
| title_full_unstemmed | Crystalline TiO2 protective layer with graded oxygen defects for efficient and stable silicon-based photocathode |
| title_short | Crystalline TiO2 protective layer with graded oxygen defects for efficient and stable silicon-based photocathode |
| title_sort | crystalline tio2 protective layer with graded oxygen defects for efficient and stable silicon-based photocathode |
| url | http://purl.org/au-research/grants/arc/DP180100568 http://hdl.handle.net/20.500.11937/71373 |