Photoluminescence and Thermoluminescence of the Oxygen-Deficient YAG, YAP, and YAM Phosphors

Abstract

Photoluminescence and thermoluminescence of the oxygen-deficient Y3Al5O12 (YAG), YAlO3 (YAP) and Y4Al2O9 (YAM) ceramics has been studied. Corresponding ceramic samples prepared by the same way however in oxidizing conditions (in air) were studied for comparison. The observed luminescent properties of the materials are related to the F-type centers created on the basis of oxygen vacancies, antisite (YAl) defects and uncontrolled Tb3+ impurity ions.