Excitonic enhancement of nonradiative energy transfer from a quantum well in the optical near field of energy gradient quantum dots
We report strong exciton migration with an efficiency of 83.3% from a violet-emitting epitaxial quantum well (QW) to an energy gradient colloidal construct of layered green- and red-emitting nanocrystal quantum dots (NQDs) at room temperature, enabled by the interplay between the exciton population...
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| Format: | Journal Article |
| Language: | English |
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2013
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| Online Access: | https://hdl.handle.net/10356/96877 http://hdl.handle.net/10220/10878 |
| _version_ | 1811690041263521792 |
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| author | Nizamoglu, Sedat Hernández-Martínez, Pedro Ludwig Mutlugun, Evren Karatay, Durmus Ugur Demir, Hilmi Volkan |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Nizamoglu, Sedat Hernández-Martínez, Pedro Ludwig Mutlugun, Evren Karatay, Durmus Ugur Demir, Hilmi Volkan |
| author_sort | Nizamoglu, Sedat |
| collection | NTU |
| description | We report strong exciton migration with an efficiency of 83.3% from a violet-emitting epitaxial quantum well (QW) to an energy gradient colloidal construct of layered green- and red-emitting nanocrystal quantum dots (NQDs) at room temperature, enabled by the interplay between the exciton population and the depopulation of states in the optical near field. Based on the density matrix formalization of near-field interactions, we theoretically model and demonstrate that the energy gradient significantly boosts the QW-NQDs exciton transfer rate compared to using mono-dispersed NQDs, which is in agreement with the observed experimental results. |
| first_indexed | 2024-10-01T05:57:41Z |
| format | Journal Article |
| id | ntu-10356/96877 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:57:41Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/968772020-03-07T14:02:38Z Excitonic enhancement of nonradiative energy transfer from a quantum well in the optical near field of energy gradient quantum dots Nizamoglu, Sedat Hernández-Martínez, Pedro Ludwig Mutlugun, Evren Karatay, Durmus Ugur Demir, Hilmi Volkan School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering We report strong exciton migration with an efficiency of 83.3% from a violet-emitting epitaxial quantum well (QW) to an energy gradient colloidal construct of layered green- and red-emitting nanocrystal quantum dots (NQDs) at room temperature, enabled by the interplay between the exciton population and the depopulation of states in the optical near field. Based on the density matrix formalization of near-field interactions, we theoretically model and demonstrate that the energy gradient significantly boosts the QW-NQDs exciton transfer rate compared to using mono-dispersed NQDs, which is in agreement with the observed experimental results. Published version 2013-07-02T02:56:24Z 2019-12-06T19:36:09Z 2013-07-02T02:56:24Z 2019-12-06T19:36:09Z 2012 2012 Journal Article Nizamoglu, S., Hernández-Martínez, P. L., Mutlugun E., Karatay, D. U., & Demir, H. V. (2012). Excitonic enhancement of nonradiative energy transfer from a quantum well in the optical near field of energy gradient quantum dots. Applied Physics Letters, 100(24), 241109-. https://hdl.handle.net/10356/96877 http://hdl.handle.net/10220/10878 10.1063/1.4724109 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/10.1063/1.4724109]. 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 Nizamoglu, Sedat Hernández-Martínez, Pedro Ludwig Mutlugun, Evren Karatay, Durmus Ugur Demir, Hilmi Volkan Excitonic enhancement of nonradiative energy transfer from a quantum well in the optical near field of energy gradient quantum dots |
| title | Excitonic enhancement of nonradiative energy transfer from a quantum well in the optical near field of energy gradient quantum dots |
| title_full | Excitonic enhancement of nonradiative energy transfer from a quantum well in the optical near field of energy gradient quantum dots |
| title_fullStr | Excitonic enhancement of nonradiative energy transfer from a quantum well in the optical near field of energy gradient quantum dots |
| title_full_unstemmed | Excitonic enhancement of nonradiative energy transfer from a quantum well in the optical near field of energy gradient quantum dots |
| title_short | Excitonic enhancement of nonradiative energy transfer from a quantum well in the optical near field of energy gradient quantum dots |
| title_sort | excitonic enhancement of nonradiative energy transfer from a quantum well in the optical near field of energy gradient quantum dots |
| topic | DRNTU::Engineering::Electrical and electronic engineering |
| url | https://hdl.handle.net/10356/96877 http://hdl.handle.net/10220/10878 |
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