New fine structure of red luminescence in ZnO observed under exciton resonance excitation

A new fine structure of red luminescence (RL) was observed in unintentionally doped ZnO at low temperature. The new RL was demonstrated to be different from the one assigned to Fe3+ center by Heitz et al and visible only under the excitation of light capable of generating excitons. The RL can be ext...

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Main Authors: N. Zhou, B. C. Hu, Q. Y. Zhang, C. Y. Ma, S. Z. Hao
Format: Article
Language:English
Published: AIP Publishing LLC 2019-04-01
Series:AIP Advances
Online Access:http://dx.doi.org/10.1063/1.5091068
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spelling doaj-2e835cb7ca364870b14c04d15bf4c3cb2020-11-24T22:15:49ZengAIP Publishing LLCAIP Advances2158-32262019-04-0194045004045004-610.1063/1.5091068009904ADVNew fine structure of red luminescence in ZnO observed under exciton resonance excitationN. Zhou0B. C. Hu1Q. Y. Zhang2C. Y. Ma3S. Z. Hao4Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, School of Physics, Dalian University of Technology, Dalian 116024, ChinaKey Laboratory of Materials Modification by Laser, Ion and Electron Beams, School of Physics, Dalian University of Technology, Dalian 116024, ChinaKey Laboratory of Materials Modification by Laser, Ion and Electron Beams, School of Physics, Dalian University of Technology, Dalian 116024, ChinaKey Laboratory of Materials Modification by Laser, Ion and Electron Beams, School of Physics, Dalian University of Technology, Dalian 116024, ChinaKey Laboratory of Materials Modification by Laser, Ion and Electron Beams, School of Physics, Dalian University of Technology, Dalian 116024, ChinaA new fine structure of red luminescence (RL) was observed in unintentionally doped ZnO at low temperature. The new RL was demonstrated to be different from the one assigned to Fe3+ center by Heitz et al and visible only under the excitation of light capable of generating excitons. The RL can be extremely enhanced at the incident frequency in resonance with the donor exciton and the intensities of some adjacent lines separated by ∼4 meV are thermally populated with the increase in temperature. The new structured RL was studied in the terms of photoluminescence (PL) and PL excitation spectra and the origin was discussed taking into account the internal transitions of transition metal elements, structure defects, and native point defects. There is a great possibility that the new structured RL arises from the excited states converted from bound excitons, for example, the excitons or the electron and hole pairs bounded by the donor and acceptor pairs (DAPs) of O and Zn vacancies, because the binding energy determined by the equation of DAP fluorescence is highly in accordance with the theoretic values reported in the literature.http://dx.doi.org/10.1063/1.5091068
collection DOAJ
language English
format Article
sources DOAJ
author N. Zhou
B. C. Hu
Q. Y. Zhang
C. Y. Ma
S. Z. Hao
spellingShingle N. Zhou
B. C. Hu
Q. Y. Zhang
C. Y. Ma
S. Z. Hao
New fine structure of red luminescence in ZnO observed under exciton resonance excitation
AIP Advances
author_facet N. Zhou
B. C. Hu
Q. Y. Zhang
C. Y. Ma
S. Z. Hao
author_sort N. Zhou
title New fine structure of red luminescence in ZnO observed under exciton resonance excitation
title_short New fine structure of red luminescence in ZnO observed under exciton resonance excitation
title_full New fine structure of red luminescence in ZnO observed under exciton resonance excitation
title_fullStr New fine structure of red luminescence in ZnO observed under exciton resonance excitation
title_full_unstemmed New fine structure of red luminescence in ZnO observed under exciton resonance excitation
title_sort new fine structure of red luminescence in zno observed under exciton resonance excitation
publisher AIP Publishing LLC
series AIP Advances
issn 2158-3226
publishDate 2019-04-01
description A new fine structure of red luminescence (RL) was observed in unintentionally doped ZnO at low temperature. The new RL was demonstrated to be different from the one assigned to Fe3+ center by Heitz et al and visible only under the excitation of light capable of generating excitons. The RL can be extremely enhanced at the incident frequency in resonance with the donor exciton and the intensities of some adjacent lines separated by ∼4 meV are thermally populated with the increase in temperature. The new structured RL was studied in the terms of photoluminescence (PL) and PL excitation spectra and the origin was discussed taking into account the internal transitions of transition metal elements, structure defects, and native point defects. There is a great possibility that the new structured RL arises from the excited states converted from bound excitons, for example, the excitons or the electron and hole pairs bounded by the donor and acceptor pairs (DAPs) of O and Zn vacancies, because the binding energy determined by the equation of DAP fluorescence is highly in accordance with the theoretic values reported in the literature.
url http://dx.doi.org/10.1063/1.5091068
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