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Specific Features of Spectrally Resolved Thermoluminescence in UV-Irradiated Aluminum Nitride Microcrystals

Authors
  • Spiridonov, D. M.1
  • Chaikin, D. V.1
  • Martemyanov, N. A.1
  • Vokhmintsev, A. S.1
  • Weinstein, I. A.1, 2
  • 1 NANOTECH Center, Ural Federal University, Yekaterinburg, 620002, Russia , Yekaterinburg (Russia)
  • 2 Institute of Metallurgy, Ural Branch, Russian Academy of Sciences, Yekaterinburg, 620016, Russia , Yekaterinburg (Russia)
Type
Published Article
Journal
Optics and Spectroscopy
Publisher
Pleiades Publishing
Publication Date
Sep 01, 2020
Volume
128
Issue
9
Pages
1430–1434
Identifiers
DOI: 10.1134/S0030400X20090210
Source
Springer Nature
Keywords
License
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Abstract

AbstractThe mechanisms of photo- and thermoluminescence processes in cation-deficient submicron AlN crystals after UV excitation are studied. The observed emission spectra represent a superposition of bands peaking at 3.0 and 2.5 eV. These spectral features are related to electronic transitions with participation of ON impurity centers and oxygen–vacancy centers of the VAl–ON type. According to a quantitative analysis within the general-order kinetics formalism, charge carrier trapping centers based on nitrogen vacancies VN have an activation energy of 0.45 eV and are responsible for the formation of a thermally activated peak at a temperature of 345 K.

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