A study on the evolution of dielectric function of ZnO thin films with decreasing film thickness
Dielectric function, band gap, and exciton binding energies of ultrathin ZnO films as a function of film thickness have been obtained with spectroscopic ellipsometry. As the film thickness decreases, both real (ε1 ) and imaginary (ε2 ) parts of the dielectric function decrease significantly, and ε2s...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2014
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| Online Access: | https://hdl.handle.net/10356/104196 http://hdl.handle.net/10220/19570 |
| _version_ | 1826111181986725888 |
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| author | Li, X. D. Chen, T. P. Liu, P. Liu, Y. Liu, Z. Leong, K. C. |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Li, X. D. Chen, T. P. Liu, P. Liu, Y. Liu, Z. Leong, K. C. |
| author_sort | Li, X. D. |
| collection | NTU |
| description | Dielectric function, band gap, and exciton binding energies of ultrathin ZnO films as a function of film thickness have been obtained with spectroscopic ellipsometry. As the film thickness decreases, both real (ε1 ) and imaginary (ε2 ) parts of the dielectric function decrease significantly, and ε2shows a blue shift. The film thickness dependence of the dielectric function is shown related to the changes in the interband absorption, discrete-exciton absorption, and continuum-exciton absorption, which can be attributed to the quantum confinement effect on both the band gap and exciton binding energies. |
| first_indexed | 2024-10-01T02:46:28Z |
| format | Journal Article |
| id | ntu-10356/104196 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:46:28Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | ntu-10356/1041962020-03-07T14:00:37Z A study on the evolution of dielectric function of ZnO thin films with decreasing film thickness Li, X. D. Chen, T. P. Liu, P. Liu, Y. Liu, Z. Leong, K. C. School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering Dielectric function, band gap, and exciton binding energies of ultrathin ZnO films as a function of film thickness have been obtained with spectroscopic ellipsometry. As the film thickness decreases, both real (ε1 ) and imaginary (ε2 ) parts of the dielectric function decrease significantly, and ε2shows a blue shift. The film thickness dependence of the dielectric function is shown related to the changes in the interband absorption, discrete-exciton absorption, and continuum-exciton absorption, which can be attributed to the quantum confinement effect on both the band gap and exciton binding energies. Published version 2014-06-04T06:45:38Z 2019-12-06T21:28:15Z 2014-06-04T06:45:38Z 2019-12-06T21:28:15Z 2014 2014 Journal Article Li, X. D., Chen, T. P., Liu, P., Liu, Y., Liu, Z., & Leong, K. C. (2014). A study on the evolution of dielectric function of ZnO thin films with decreasing film thickness. Journal of Applied Physics, 115(10), 103512-. 0021-8979 https://hdl.handle.net/10356/104196 http://hdl.handle.net/10220/19570 10.1063/1.4868338 en Journal of applied physics © 2014 AIP Publishing LLC. This paper was published in Journal of Applied Physics and is made available as an electronic reprint (preprint) with permission of AIP Publishing LLC. The paper can be found at the following official DOI: http://dx.doi.org/10.1063/1.4868338. 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 | DRNTU::Engineering::Electrical and electronic engineering Li, X. D. Chen, T. P. Liu, P. Liu, Y. Liu, Z. Leong, K. C. A study on the evolution of dielectric function of ZnO thin films with decreasing film thickness |
| title | A study on the evolution of dielectric function of ZnO thin films with decreasing film thickness |
| title_full | A study on the evolution of dielectric function of ZnO thin films with decreasing film thickness |
| title_fullStr | A study on the evolution of dielectric function of ZnO thin films with decreasing film thickness |
| title_full_unstemmed | A study on the evolution of dielectric function of ZnO thin films with decreasing film thickness |
| title_short | A study on the evolution of dielectric function of ZnO thin films with decreasing film thickness |
| title_sort | study on the evolution of dielectric function of zno thin films with decreasing film thickness |
| topic | DRNTU::Engineering::Electrical and electronic engineering |
| url | https://hdl.handle.net/10356/104196 http://hdl.handle.net/10220/19570 |
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