Discrete hopping model of exciton transport in disordered media
A model of dispersive exciton transport has been developed for a medium with exciton energy levels randomly distributed in both space and energy scale. For a boxcar density of states of excitons an analytical solution is given describing the exciton density as a function of time and the proximity to...
| 主要な著者: | , , , , , |
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| フォーマット: | Journal article |
| 言語: | English |
| 出版事項: |
American Physical Society
2005
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| 主題: |
| _version_ | 1826297854588616704 |
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| author | Burlakov, V Kawata, K Assender, H Briggs, G Ruseckas, A Samuel, I |
| author_facet | Burlakov, V Kawata, K Assender, H Briggs, G Ruseckas, A Samuel, I |
| author_sort | Burlakov, V |
| collection | OXFORD |
| description | A model of dispersive exciton transport has been developed for a medium with exciton energy levels randomly distributed in both space and energy scale. For a boxcar density of states of excitons an analytical solution is given describing the exciton density as a function of time and the proximity to the exciton quenching interfaces. The model parameters, such as exciton lifetime, effective number of exciton energy levels within inhomogeneously broadened density of states, and hopping distance and hopping rate constants, could be determined using time-resolved photoluminescence data. The developed model is verified via comparison with experimental data on the time-dependent photoluminescence decay of the conjugated polymer MEH-PPV and on the spectrum of internal quantum efficiency of the heterojunction photovoltaic device based on the MEH-PPV/TiO2 nanostructure. |
| first_indexed | 2024-03-07T04:37:58Z |
| format | Journal article |
| id | oxford-uuid:d0a26213-44b7-4422-ba8c-6645a576afa3 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T04:37:58Z |
| publishDate | 2005 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:d0a26213-44b7-4422-ba8c-6645a576afa32022-03-27T07:51:18ZDiscrete hopping model of exciton transport in disordered mediaJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:d0a26213-44b7-4422-ba8c-6645a576afa3Materials SciencesEnglishOxford University Research Archive - ValetAmerican Physical Society2005Burlakov, VKawata, KAssender, HBriggs, GRuseckas, ASamuel, IA model of dispersive exciton transport has been developed for a medium with exciton energy levels randomly distributed in both space and energy scale. For a boxcar density of states of excitons an analytical solution is given describing the exciton density as a function of time and the proximity to the exciton quenching interfaces. The model parameters, such as exciton lifetime, effective number of exciton energy levels within inhomogeneously broadened density of states, and hopping distance and hopping rate constants, could be determined using time-resolved photoluminescence data. The developed model is verified via comparison with experimental data on the time-dependent photoluminescence decay of the conjugated polymer MEH-PPV and on the spectrum of internal quantum efficiency of the heterojunction photovoltaic device based on the MEH-PPV/TiO2 nanostructure. |
| spellingShingle | Materials Sciences Burlakov, V Kawata, K Assender, H Briggs, G Ruseckas, A Samuel, I Discrete hopping model of exciton transport in disordered media |
| title | Discrete hopping model of exciton transport in disordered media |
| title_full | Discrete hopping model of exciton transport in disordered media |
| title_fullStr | Discrete hopping model of exciton transport in disordered media |
| title_full_unstemmed | Discrete hopping model of exciton transport in disordered media |
| title_short | Discrete hopping model of exciton transport in disordered media |
| title_sort | discrete hopping model of exciton transport in disordered media |
| topic | Materials Sciences |
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