title: Combustion synthesis and luminescence properties of SrAl2O4:Eu2+, Dy3+, Tb3+ phosphor.
abstract: Eu(2+), Dy(3+) and Tb(3+) co-doped strontium aluminate phosphor with high brightness and long afterglow was synthesized by a combustion method, using urea as a reducer. The properties of SrAl(2)O(4):Eu(2+),Dy(3+),Tb(3+) phosphor with a series of initiating combustion temperatures, urea concentrations and boric acid molar fractions were investigated. The sample at initiating combustion temperature of 600 degrees C exhibited an intense emission peak at 513 nm, in which the phosphor existed as a single-phase monoclinic structure. The experimental results showed that the optimum ratio of urea is 2.0 times higher than theoretical quantities and that the suitable molar fraction of H(3)BO(3) is 0.08. The average particle size of the phosphor was 50-80 nm and its luminescence properties were studied systematically. Compared with SrAl(2)O(4):Eu(2+),Dy(3+) phosphor, the initial luminescence brightness improved from 2.50 candela (cd)/m(2) to 3.55 cd/m(2) and the long afterglow time was prolonged from 1290 s to 2743 s.
authors.affiliation: Hubei Key Laboratory for Catalysis and Material Science, College of Chemistry and Material Science, South Central University for Nationalities, Wuhan , Hubei, People's Republic of China.
authors.forename: Huajie
authors.initials: H
authors.lastname: Song
authors.forename: Donghua
authors.initials: D
authors.lastname: Chen
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry*; D001888:Boric Acids / Q000737:chemistry; D002412:Cations; D003460:Crystallization; D004419:Dysprosium / Q000737:chemistry*; D005063:Europium / Q000737:chemistry*; D049449:Luminescence; D008422:Materials Testing; D046529:Microscopy, Electron, Transmission; D036103:Nanotechnology / Q000379:methods; D010316:Particle Size; D010758:Phosphorus / Q000737:chemistry*; D013057:Spectrum Analysis; D013324:Strontium / Q000737:chemistry*; D013696:Temperature; D013725:Terbium / Q000737:chemistry*; D013997:Time Factors; D014508:Urea / Q000737:chemistry; D014961:X-Ray Diffraction
chemical_list: D001888:Boric Acids; D002412:Cations; D013725:Terbium; D004419:Dysprosium; D010758:Phosphorus; D005063:Europium; D014508:Urea; D000537:Aluminum Oxide; C032688:boric acid; D013324:Strontium