Localised transitions in luminescence of AlN ceramics

6533b862fe1ef96bd12c75a3

RESEARCH PRODUCT

Localised transitions in luminescence of AlN ceramics

Laima Trinkler B. Berzina

subject

Radiation Materials science Photoluminescence Excited state Irradiation Atomic physics Ground state Luminescence Instrumentation Thermoluminescence Quantum tunnelling Afterglow

description

Abstract The photoluminescence (PL) and thermoluminescence (TL) properties of AlN ceramics revealed under UV irradiation are determined mainly by oxygen-related centres, giving rise to the UV (around 3.18 eV) and the Blue (2.58 eV) bands. It was found that the UV irradiation-generated donor–acceptor pairs (DAPs), responsible for the UV emission band, are randomly distributed with regard to separation distance. Luminescence properties of AlN are interpreted basing on the model of localised recombination involving electron tunnel transitions from the excited state of D to the ground state of A, proposed by Jain et al. (2012) . The observed features of PL, afterglow and TL of AlN ceramics are explained by dependence of tunnelling recombination probability on separation distance between D and A implied by the used model.

year	journal	country	edition	language
2014-12-01	Radiation Measurements

https://doi.org/10.1016/j.radmeas.2014.02.016

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