TEMPERATURE DEPENDENT CHARACTERISTICS OF SrAl2O4:Dy 3+PHOSPHOR

Abstract

We report the detailed temperature-dependent characteristics of Dy3+ doped SrAl2O4 phosphor. The phosphor synthesised using precipitation method was annealed at three different temperatures, specifically 800ºC, 900ºC, and 1000ºC. The three samples were analyzed using XRD, SEM, TEM, RAMAN, and FTIR. The observed photoluminescence emissions were consisting of peaks arising from the host SrAl2O4 as well as the dopant Dy3+. The crystallite sizes were found to be 27.22nm, 29.74nm, and 31.24nm, respectively, with the increase in annealing temperature. SEM, TEM images showed nearspherical, rod-like shapes of the crystals, and SAED confirmed the crystals were single-crystal. CIE analysis results showed that the colour coordinate was found to be very close to white colour in the three annealing temperatures, which is an advantage in the field of technology development.