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On the double-band luminescence of ZnO nanoparticles

Lijie Li Orcid Logo

EPL (Europhysics Letters), Volume: 117, Issue: 6, Start page: 67005

Swansea University Author: Lijie Li Orcid Logo

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DOI (Published version): 10.1209/0295-5075/117/67005

Abstract

Two luminescence bands from zinc oxide (ZnO) nanoparticles are known and have been experimentally observed previously. The unanswered question concerns the mechanism leading to the visible spectrum in the blue or green region. So far there have been many postulations trying to elucidate this phenome...

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Published in: EPL (Europhysics Letters)
ISSN: 0295-5075 1286-4854
Published: 2017
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URI: https://cronfa.swan.ac.uk/Record/cronfa33707
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first_indexed 2017-05-18T13:00:08Z
last_indexed 2018-02-09T05:23:05Z
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spelling 2017-07-31T14:44:11.3945708 v2 33707 2017-05-18 On the double-band luminescence of ZnO nanoparticles ed2c658b77679a28e4c1dcf95af06bd6 0000-0003-4630-7692 Lijie Li Lijie Li true false 2017-05-18 EEEG Two luminescence bands from zinc oxide (ZnO) nanoparticles are known and have been experimentally observed previously. The unanswered question concerns the mechanism leading to the visible spectrum in the blue or green region. So far there have been many postulations trying to elucidate this phenomenon, but none of them gives a mathematical expression that simultaneously explain these two spectra. Here we interpret this phenomenon as the combination of distribution functions and the density of states of electrons and holes, precisely the product of both. From the analysis, the narrow UV emission is predominantly attributed to the quantum confinement, and the product of the density of states and the distribution functions determines the visible spectrum. We find that varying the density and the effective mass of holes causes a pronounced effect on both UV and visible emissions, which reflects the fact that acceptors take the main responsibility in the experimental observations. Journal Article EPL (Europhysics Letters) 117 6 67005 0295-5075 1286-4854 17 5 2017 2017-05-17 10.1209/0295-5075/117/67005 COLLEGE NANME Electronic and Electrical Engineering COLLEGE CODE EEEG Swansea University 2017-07-31T14:44:11.3945708 2017-05-18T08:56:28.9751286 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering Lijie Li 0000-0003-4630-7692 1 0033707-18052017090247.pdf EPL_LL.pdf 2017-05-18T09:02:47.9970000 Output 854479 application/pdf Accepted Manuscript true 2018-05-17T00:00:00.0000000 true eng
title On the double-band luminescence of ZnO nanoparticles
spellingShingle On the double-band luminescence of ZnO nanoparticles
Lijie Li
title_short On the double-band luminescence of ZnO nanoparticles
title_full On the double-band luminescence of ZnO nanoparticles
title_fullStr On the double-band luminescence of ZnO nanoparticles
title_full_unstemmed On the double-band luminescence of ZnO nanoparticles
title_sort On the double-band luminescence of ZnO nanoparticles
author_id_str_mv ed2c658b77679a28e4c1dcf95af06bd6
author_id_fullname_str_mv ed2c658b77679a28e4c1dcf95af06bd6_***_Lijie Li
author Lijie Li
author2 Lijie Li
format Journal article
container_title EPL (Europhysics Letters)
container_volume 117
container_issue 6
container_start_page 67005
publishDate 2017
institution Swansea University
issn 0295-5075
1286-4854
doi_str_mv 10.1209/0295-5075/117/67005
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering
document_store_str 1
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description Two luminescence bands from zinc oxide (ZnO) nanoparticles are known and have been experimentally observed previously. The unanswered question concerns the mechanism leading to the visible spectrum in the blue or green region. So far there have been many postulations trying to elucidate this phenomenon, but none of them gives a mathematical expression that simultaneously explain these two spectra. Here we interpret this phenomenon as the combination of distribution functions and the density of states of electrons and holes, precisely the product of both. From the analysis, the narrow UV emission is predominantly attributed to the quantum confinement, and the product of the density of states and the distribution functions determines the visible spectrum. We find that varying the density and the effective mass of holes causes a pronounced effect on both UV and visible emissions, which reflects the fact that acceptors take the main responsibility in the experimental observations.
published_date 2017-05-17T03:41:44Z
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score 11.016258

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