Photoluminescence and thermoluminescence characteristics of Sr sub(3)B sub(2)O sub(6):Eu super(2+) yellow phosphor

• Published in: Luminescence (Chichester, England) Vol. 31; no. 5; pp. 1103 - 1108
• Main Authors: Ho Van, Tuyen, Nguyen Manh, Son, Vu Xuan, Quang, Bounyavong, Sengthong
• Format: Journal Article
• Language: English
• Published: 01-08-2016
• Subjects: Band spectra; Crystal structure; Excitation spectra; Luminescence; Phosphors; Photoluminescence; Quenching; Thermoluminescence
• ISSN: 1522-7235; 1522-7243
• DOI: 10.1002/bio.3078

Sr sub(3)B sub(2)O sub(6):Eu super(2+) yellow phosphor was prepared by the combustion method. The crystalline structure, photoluminescence and thermoluminescence properties of Sr sub(3)B sub(2)O sub(6):Eu super(2+) were investigated extensively. The X-ray diffraction result indicates that the Sr sub(3)B sub(2)O sub(6):Eu super(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 4f super(6)5d super(1) arrow right 4f super(7) transition of Eu super(2+) ion. There were two different sites of Sr replaced by Eu in host lattice. The concentration quenching process between Eu super(2+) ions is determined and the corresponding concentration quenching mechanism was verified as dipole-quadrupole interaction. The glow curve under 3 Gy beta - ray irradiation had the glow peak at 160 degree C and the average activation energy was defined as about 0.98 eV.