Size and surface effects on transient photoconductivity in CdS nanobelts probed by time-resolved terahertz spectroscopy
Ultrafast optical-pump terahertz probe spectroscopy was performed over a graduated size distribution of CdS nanobelts to investigate the size and surface effects on the transient photoconductivity. It was found that the nanobelt size has a profound influence on the carrier localization and photocond...
| Main Authors: | , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2013
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| Online Access: | https://hdl.handle.net/10356/94940 http://hdl.handle.net/10220/9223 |
| _version_ | 1826110181692407808 |
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| author | Li, Mingjie Wu, Bo Ekahana, Sandy Adhitia Utama, Muhammad Iqbal Bakti Xing, Guichuan Xiong, Qihua Sum, Tze Chien Zhang, Xinhai |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Li, Mingjie Wu, Bo Ekahana, Sandy Adhitia Utama, Muhammad Iqbal Bakti Xing, Guichuan Xiong, Qihua Sum, Tze Chien Zhang, Xinhai |
| author_sort | Li, Mingjie |
| collection | NTU |
| description | Ultrafast optical-pump terahertz probe spectroscopy was performed over a graduated size distribution of CdS nanobelts to investigate the size and surface effects on the transient photoconductivity. It was found that the nanobelt size has a profound influence on the carrier localization and photoconductivity dynamics, brought about by the carrier trapping at surface defects. The strong carrier localization in the nanobelt is ascribed to the internal surface boundaries arising from the surface depletion layer. The increased thickness of surface depletion layer due to a continuous trapping of photocarriers at surface defects results in more pronounced carrier localization after photoexcitation. |
| first_indexed | 2024-10-01T02:30:32Z |
| format | Journal Article |
| id | ntu-10356/94940 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:30:32Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/949402023-02-28T19:38:39Z Size and surface effects on transient photoconductivity in CdS nanobelts probed by time-resolved terahertz spectroscopy Li, Mingjie Wu, Bo Ekahana, Sandy Adhitia Utama, Muhammad Iqbal Bakti Xing, Guichuan Xiong, Qihua Sum, Tze Chien Zhang, Xinhai School of Electrical and Electronic Engineering Ultrafast optical-pump terahertz probe spectroscopy was performed over a graduated size distribution of CdS nanobelts to investigate the size and surface effects on the transient photoconductivity. It was found that the nanobelt size has a profound influence on the carrier localization and photoconductivity dynamics, brought about by the carrier trapping at surface defects. The strong carrier localization in the nanobelt is ascribed to the internal surface boundaries arising from the surface depletion layer. The increased thickness of surface depletion layer due to a continuous trapping of photocarriers at surface defects results in more pronounced carrier localization after photoexcitation. Published version 2013-02-21T08:04:09Z 2019-12-06T19:05:05Z 2013-02-21T08:04:09Z 2019-12-06T19:05:05Z 2012 2012 Journal Article Li, M., Wu, B., Ekahana, S. A., Utama, M. I. B., Xing, G., Xiong, Q., et al. (2012). Size and surface effects on transient photoconductivity in CdS nanobelts probed by time-resolved terahertz spectroscopy. Applied Physics Letters, 101(9). 0003-6951 https://hdl.handle.net/10356/94940 http://hdl.handle.net/10220/9223 10.1063/1.4748300 en Applied Physics Letters © 2012 American Institute of Physics. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of American Institute of Physics. The paper can be found at the following official DOI: [http://dx.doi.org/10.1063/1.4748300]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf |
| spellingShingle | Li, Mingjie Wu, Bo Ekahana, Sandy Adhitia Utama, Muhammad Iqbal Bakti Xing, Guichuan Xiong, Qihua Sum, Tze Chien Zhang, Xinhai Size and surface effects on transient photoconductivity in CdS nanobelts probed by time-resolved terahertz spectroscopy |
| title | Size and surface effects on transient photoconductivity in CdS nanobelts probed by time-resolved terahertz spectroscopy |
| title_full | Size and surface effects on transient photoconductivity in CdS nanobelts probed by time-resolved terahertz spectroscopy |
| title_fullStr | Size and surface effects on transient photoconductivity in CdS nanobelts probed by time-resolved terahertz spectroscopy |
| title_full_unstemmed | Size and surface effects on transient photoconductivity in CdS nanobelts probed by time-resolved terahertz spectroscopy |
| title_short | Size and surface effects on transient photoconductivity in CdS nanobelts probed by time-resolved terahertz spectroscopy |
| title_sort | size and surface effects on transient photoconductivity in cds nanobelts probed by time resolved terahertz spectroscopy |
| url | https://hdl.handle.net/10356/94940 http://hdl.handle.net/10220/9223 |
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