Effects of step-potential on confinement strength of strain-induced type-I core–shell quantum dots
In this paper, the transition energy between lowest unoccupied molecular orbital (LUMO) of conduction band and highest occupied molecular orbital (HOMO) of valence band for band structures of type-I core-shell quantum dots (CSQDs) within a strong and weak confinements of charge carriers are estimate...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2019
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| Online Access: | http://psasir.upm.edu.my/id/eprint/79625/1/Effects%20of%20step-potential%20on%20confinement%20strength%20of%20strain-induced%20type-I%20core-shell%20quantum%20dots.pdf |
| _version_ | 1825951184058318848 |
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| author | Tiansin, Shelawati Mohd Shah, Nurisya Chan, Kar Tim Ahmad Kamarudin, Mazliana |
| author_facet | Tiansin, Shelawati Mohd Shah, Nurisya Chan, Kar Tim Ahmad Kamarudin, Mazliana |
| author_sort | Tiansin, Shelawati |
| collection | UPM |
| description | In this paper, the transition energy between lowest unoccupied molecular orbital (LUMO) of conduction band and highest occupied molecular orbital (HOMO) of valence band for band structures of type-I core-shell quantum dots (CSQDs) within a strong and weak confinements of charge carriers are estimated using the effective mass approximation together with single-band model. The effect of potential step at the conduction and valence bands on the confinement strength is then properly discussed. Our numerical results show that for a same size of CSQDs, the one with bigger potential steps will have stronger carriers' confinement with more localized excitons. |
| first_indexed | 2024-03-06T10:26:07Z |
| format | Article |
| id | upm.eprints-79625 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T10:26:07Z |
| publishDate | 2019 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | upm.eprints-796252021-08-15T00:41:55Z http://psasir.upm.edu.my/id/eprint/79625/ Effects of step-potential on confinement strength of strain-induced type-I core–shell quantum dots Tiansin, Shelawati Mohd Shah, Nurisya Chan, Kar Tim Ahmad Kamarudin, Mazliana In this paper, the transition energy between lowest unoccupied molecular orbital (LUMO) of conduction band and highest occupied molecular orbital (HOMO) of valence band for band structures of type-I core-shell quantum dots (CSQDs) within a strong and weak confinements of charge carriers are estimated using the effective mass approximation together with single-band model. The effect of potential step at the conduction and valence bands on the confinement strength is then properly discussed. Our numerical results show that for a same size of CSQDs, the one with bigger potential steps will have stronger carriers' confinement with more localized excitons. Elsevier 2019-07 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/79625/1/Effects%20of%20step-potential%20on%20confinement%20strength%20of%20strain-induced%20type-I%20core-shell%20quantum%20dots.pdf Tiansin, Shelawati and Mohd Shah, Nurisya and Chan, Kar Tim and Ahmad Kamarudin, Mazliana (2019) Effects of step-potential on confinement strength of strain-induced type-I core–shell quantum dots. Superlattices and Microstructures, 131. pp. 95-103. ISSN 0749-6036 https://www.sciencedirect.com/science/article/abs/pii/S0749603618325357 10.1016/j.spmi.2019.05.021 |
| spellingShingle | Tiansin, Shelawati Mohd Shah, Nurisya Chan, Kar Tim Ahmad Kamarudin, Mazliana Effects of step-potential on confinement strength of strain-induced type-I core–shell quantum dots |
| title | Effects of step-potential on confinement strength of strain-induced type-I core–shell quantum dots |
| title_full | Effects of step-potential on confinement strength of strain-induced type-I core–shell quantum dots |
| title_fullStr | Effects of step-potential on confinement strength of strain-induced type-I core–shell quantum dots |
| title_full_unstemmed | Effects of step-potential on confinement strength of strain-induced type-I core–shell quantum dots |
| title_short | Effects of step-potential on confinement strength of strain-induced type-I core–shell quantum dots |
| title_sort | effects of step potential on confinement strength of strain induced type i core shell quantum dots |
| url | http://psasir.upm.edu.my/id/eprint/79625/1/Effects%20of%20step-potential%20on%20confinement%20strength%20of%20strain-induced%20type-I%20core-shell%20quantum%20dots.pdf |
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