Specific Features of Spectrally Resolved Thermoluminescence in UV-Irradiated Aluminum Nitride Microcrystals
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2020-09-01 |
| Journal | Optics and Spectroscopy |
| Authors | D.M. Spiridonov, Š. Š. Š§Š°Š¹ŠŗŠøŠ½, N. A. Martemyanov, A. S. Vokhmintsev, I. A. Weinstein |
| Institutions | Russian Academy of Sciences, Institute of Metallurgy |
| Citations | 4 |
Abstract
Section titled āAbstractāThe 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.