Luminescent properties of Eu3+ co-doped Y2O3: Dy3+ phosphors synthesized via ceramic route

Abstract

The Eu3+ co-doped Y2O3: Dy3+ phosphors were synthesized by solid-state reaction method, also known as a ceramic route. The properties of synthesized phosphors were studied with the help of PXRD, SEM, EDX, FTIR, Photoluminescence (PL) spectra, CIE coordinates and Thermoluminescent (TL) spectra. The PL spectra exhibit emissions at 486, 588, 596, 610, 681 and 693 nm due to the energy transfer between dopant ions. The blue emission is dominated due to dysprosium ions. The TL spectra were recorded for synthesized phosphors irradiated by UV and γ radiation. For UV irradiated phosphors, TL glow peaks were obtained at 455, 490 and 549 K whereas for γ irradiated phosphors TL glow peaks were obtained at 470 and 650 K. Using deconvoluted TL curves, kinetic parameters were computed by peak shape method. Second order kinetics were obtained with activation energy values varying from 7.553 × 10− 1 to 11.10 × 10− 1 eV for UV irradiated phosphors and 11.152 × 10− 1 to 15.252 × 10− 1 eV for γ irradiated phosphors.