Composition-graded ZnxCd1–xSe@ZnO core–shell nanowire array electrodes for photoelectrochemical hydrogen generation
One-dimensional oxide nanostructure arrays are widely investigated as photoelectrodes in solar cells or photoelectrochemical (PEC) solar hydrogen generation applications, for which it is highly desirable for the electrode to have a broad light absorption and an efficient charge separation. In this w...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2013
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| Online Access: | https://hdl.handle.net/10356/98890 http://hdl.handle.net/10220/17122 |
| _version_ | 1811695036483502080 |
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| author | Li, Hongxing Cheng, Chuanwei Li, Xianglin Liu, Jinping Guan, Cao Tay, Yee Yan Fan, Hong Jin |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Li, Hongxing Cheng, Chuanwei Li, Xianglin Liu, Jinping Guan, Cao Tay, Yee Yan Fan, Hong Jin |
| author_sort | Li, Hongxing |
| collection | NTU |
| description | One-dimensional oxide nanostructure arrays are widely investigated as photoelectrodes in solar cells or photoelectrochemical (PEC) solar hydrogen generation applications, for which it is highly desirable for the electrode to have a broad light absorption and an efficient charge separation. In this work, a composition-graded ZnxCd1–xSe@ZnO core–shell nanowire array is prepared through temperature-gradient chemical vapor deposition (CVD) of ZnxCd1–xSe layer onto the pregrown ZnO nanowires. The core–shell nanowire array photoelectrodes yield a continuous absorption edge from 2.7 (460 nm) to 1.77 eV (700 nm) across the sample surface. The core–shell heterostructure facilitates the photogenerated electron–hole pair separation and the electron transfer from ZnCdSe to ZnO. By using such core–shell nanowire arrays as photoanodes for solar hydrogen generation via a PEC cell, a photocurrent density of 5.6 mA/cm2 is achieved under 1 sun solar light illumination at zero bias versus Ag/AgCl. This method may be useful in the design of multijunction nanostructured semiconductor photoelectrodes toward more efficient solar fuel devices. |
| first_indexed | 2024-10-01T07:17:05Z |
| format | Journal Article |
| id | ntu-10356/98890 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:17:05Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/988902020-06-01T10:01:42Z Composition-graded ZnxCd1–xSe@ZnO core–shell nanowire array electrodes for photoelectrochemical hydrogen generation Li, Hongxing Cheng, Chuanwei Li, Xianglin Liu, Jinping Guan, Cao Tay, Yee Yan Fan, Hong Jin School of Materials Science & Engineering School of Physical and Mathematical Sciences DRNTU::Science::Chemistry::Physical chemistry::Photochemistry One-dimensional oxide nanostructure arrays are widely investigated as photoelectrodes in solar cells or photoelectrochemical (PEC) solar hydrogen generation applications, for which it is highly desirable for the electrode to have a broad light absorption and an efficient charge separation. In this work, a composition-graded ZnxCd1–xSe@ZnO core–shell nanowire array is prepared through temperature-gradient chemical vapor deposition (CVD) of ZnxCd1–xSe layer onto the pregrown ZnO nanowires. The core–shell nanowire array photoelectrodes yield a continuous absorption edge from 2.7 (460 nm) to 1.77 eV (700 nm) across the sample surface. The core–shell heterostructure facilitates the photogenerated electron–hole pair separation and the electron transfer from ZnCdSe to ZnO. By using such core–shell nanowire arrays as photoanodes for solar hydrogen generation via a PEC cell, a photocurrent density of 5.6 mA/cm2 is achieved under 1 sun solar light illumination at zero bias versus Ag/AgCl. This method may be useful in the design of multijunction nanostructured semiconductor photoelectrodes toward more efficient solar fuel devices. 2013-10-31T05:37:17Z 2019-12-06T20:00:51Z 2013-10-31T05:37:17Z 2019-12-06T20:00:51Z 2012 2012 Journal Article Li, H., Cheng, C., Li, X., Liu, J., Guan, C., Tay, Y. Y., & Fan, H. J. (2012). Composition-graded ZnxCd1–xSe@ZnO core–shell nanowire array electrodes for photoelectrochemical hydrogen generation. The journal of physical chemistry C, 116(5), 3802-3807. https://hdl.handle.net/10356/98890 http://hdl.handle.net/10220/17122 10.1021/jp204747w en The journal of physical chemistry C |
| spellingShingle | DRNTU::Science::Chemistry::Physical chemistry::Photochemistry Li, Hongxing Cheng, Chuanwei Li, Xianglin Liu, Jinping Guan, Cao Tay, Yee Yan Fan, Hong Jin Composition-graded ZnxCd1–xSe@ZnO core–shell nanowire array electrodes for photoelectrochemical hydrogen generation |
| title | Composition-graded ZnxCd1–xSe@ZnO core–shell nanowire array electrodes for photoelectrochemical hydrogen generation |
| title_full | Composition-graded ZnxCd1–xSe@ZnO core–shell nanowire array electrodes for photoelectrochemical hydrogen generation |
| title_fullStr | Composition-graded ZnxCd1–xSe@ZnO core–shell nanowire array electrodes for photoelectrochemical hydrogen generation |
| title_full_unstemmed | Composition-graded ZnxCd1–xSe@ZnO core–shell nanowire array electrodes for photoelectrochemical hydrogen generation |
| title_short | Composition-graded ZnxCd1–xSe@ZnO core–shell nanowire array electrodes for photoelectrochemical hydrogen generation |
| title_sort | composition graded znxcd1 xse zno core shell nanowire array electrodes for photoelectrochemical hydrogen generation |
| topic | DRNTU::Science::Chemistry::Physical chemistry::Photochemistry |
| url | https://hdl.handle.net/10356/98890 http://hdl.handle.net/10220/17122 |
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