Tunneling luminescence in long lasting afterglow of SrAl2O4:Eu,Dy
Date
2017
Authors
Liepina, Virginija
Millers, Donats
Smits, Krisjanis
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier B.V.
Abstract
A long lasting (afterglowing) luminescent material SrAl2O4: Eu2+, Dy3+ was prepared by high temperature solid-state reaction method. The processes responsible for long lasting luminescence were studied by means of luminescence spectra, thermally stimulated luminescence and afterglow kinetics. Two processes are found to contribute in excited Eu 2+ creation – the thermally released electrons recombination and electron tunneling from trap to Eu3+. The possible scheme of long lasting luminescence mechanism is proposed.
Description
The publication is prepared with the financial support of National Research Programme IMIS2.
Keywords
Research Subject Categories::NATURAL SCIENCES:Physics , Long afterglow , Luminescence , Rare earth