Effect of Sm3+ and Mn2+ incorporation on the structure and luminescence characteristics of Zn2SiO4 phosphor. (April 2021)

• Record Type: Journal Article
• Authors: Portakal-Uçar, Z.G.; Dogan, T.; Akça, S.; Kaynar, Ü.H.; Topaksu, M.
• Is Part Of: Radiation physics and chemistry. Volume 181(2021)
• Publication Date: 2021-04
• Subjects: Zn2SiO4 -- Double doping -- TL -- CGCD -- Thermal quenching; Radiation chemistry -- Periodicals; Radiometry -- Periodicals; Radiation -- Periodicals; Chimie sous rayonnement -- Périodiques; 539.2
• DOI: 10.1016/j.radphyschem.2020.109329
• Languages: English
• ISSNs: 0969-806X

Abstract

Abstract: To evaluate the dopant effect precisely, X-ray diffraction (XRD) for structural, scanning electron microscopy (SEM) with energy dispersive x-ray spectroscopy (EDS) analysis for morphological, photoluminescence (PL) and thermoluminescence (TL) characteristics of un-doped, 2.0 mol% Sm 3+ doped and 2.0 mol% Sm 3+ ;x mol% Mn 2+ (x = 0.5, 1.0, 2.0, 4.0) doped Zn2 SiO4 phosphors were tested. PL mechanisms of excitation and emission were discussed together with data on the structure and morphology of the samples. The beta doses from 0.1 to 500 Gy with various steps were applied to observe the glow curve readouts after 200 °C preheat at a linear heating rate of 2 ° C/s from RT to 500 °C. Zn2 SiO4 :2.0%Sm 3+ ;0.5%Mn 2+ was chosen for further analysis due to having both the most PL and TL peak area. Various heating rate method was used to determine the kinetic parameters as well as initial rise with T M - T stop analysis and computerized glow curve deconvolution methods. Graphical abstract: Image 1 Highlights: Zn2 SiO4 :Sm 3+ ;Mn 2+ nanocrystalline phosphor was synthetized by gel combustion method. Crystal structure and morphology were evaluated by XRD, SEM and EDS analyses. Luminescence properties were discussed using PL and TL methods. Overlapped TL peaks behavior were evaluated using IR (with T M - T stop analysis) and CGCD methods. The causes of the decrease in the activation energy with increasing temperature were physically explained.