Photoluminescence and thermoluminescence characteristics of Sr₃B₂O₆:Eu²⁺ yellow phosphor

Abstract

Abstract Sr 3 B 2 O 6 :Eu 2+ yellow phosphor was prepared by the combustion method. The crystalline structure, photoluminescence and thermoluminescence properties of Sr 3 B 2 O 6 :Eu 2+ were investigated extensively. The X‐ray diffraction result indicates that the Sr 3 B 2 O 6 :Eu 2+ phosphor exhibited a rhombohedral crystal structure. The emission spectra under a 435 nm excited wavelength showed an intense broad band peaking at 574 nm, which corresponds to the 4 f 6 5 d 1 → 4 f 7 transition of Eu 2+ ion. There were two different sites of Sr replaced by Eu in host lattice. The concentration quenching process between Eu 2+ ions is determined and the corresponding concentration quenching mechanism was verified as dipole‐quadrupole interaction. The glow curve under 3 Gy β ‐ ray irradiation had the glow peak at 160°C and the average activation energy was defined as about 0.98 eV. Copyright © 2015 John Wiley & Sons, Ltd.