TL and OSL properties of Mn2+-doped MgGa2O4 phosphor

LUCHECHKO A., ZHYDACHEVSKYY Y., MARABA D., BULUR E., UBİZSKİİ S., KRAVETS O.

OPTICAL MATERIALS, vol.78, pp.502-507, 2018 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 78
  • Publication Date: 2018
  • Doi Number: 10.1016/j.optmat.2018.03.004
  • Journal Name: OPTICAL MATERIALS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.502-507
  • Keywords: Magnesium gallate MgGa2O4, Mn2+ ions, Photoluminescence, Thermoluminescence, Lifetime, Time-resolved optically stimulated luminescence, OPTICALLY STIMULATED LUMINESCENCE, TIME-RESOLVED OSL, SPINEL, DEFECTS
  • Middle East Technical University Affiliated: Yes

Abstract

The oxide MgGa2O4 spinel ceramics doped with Mn2+ ions was synthesized by a solid-state reaction at 1200 degrees C in air. The activator concentration was equal 0.05 mol% of MnO. Phase purity of the synthesized samples was analyzed by X-ray diffraction technique. This spinet ceramics show efficient green emission in the range from 470 to 550 nm with a maximum at about 505 nm under UV or X-ray excitations, which is due to Mn2+ ions. MgGa2O4: Mn2+ exhibits intense thermoluminescence (TL) and optically stimulated luminescence (OSL) after influence of ionizing radiation. Are complex nature of the TL glow curves is associated with a significant number of structural defects that are responsible for the formation of shallow and deep electron traps. In this work, time-resolved OSL characteristics of the samples exposed to beta particles are reported for the first time. A light from green LED was used for optical stimulation. Obtained TL and OSL results suggest MgGa2O4:Mn2+ as perspective material for further research and possible application in radiation dosimetry. (C) 2018 Elsevier B.V. All rights reserved.