title: Bluish-green color emitting Ba2Si3O8:Eu2+ ceramic phosphors for white light-emitting diodes.
abstract: This paper reports on the structural and optical properties of Eu(2+) activated Ba(2)Si(3)O(8) ceramic phosphors synthesized by a sol-gel method. The ceramic phosphors have been characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM) and fluorescence measurements. The structural characterization results suggest that the as-prepared phosphors are of single phase monoclinic Ba(2)Si(3)O(8) with rod-like morphology. A broad excitation band ranging from 300 to 410 nm matches well with the ultraviolet (UV) radiation of light-emitting diodes (LEDs). Upon 380 nm UV light excitation, these phosphors emit bluish-green emission centered at 500 nm with color coordination (x=0.25, y=0.40). All the obtained results indicate that the Ba(2)Si(3)O(8):Eu(2+) ceramic phosphors are promising bluish-green candidates for the phosphor-converted white LEDs.
authors.affiliation: MOE Key Lab of Specially Functional Materials and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641, PR China.
authors.forename: F
authors.initials: F
authors.lastname: Xiao
authors.forename: Y N
authors.initials: YN
authors.lastname: Xue
authors.forename: Q Y
authors.initials: QY
authors.lastname: Zhang
mesh_terms: D001464:Barium / Q000737:chemistry*; D002516:Ceramics / Q000737:chemistry*; D005063:Europium / Q000737:chemistry*; D008027:Light; D049449:Luminescence; D015394:Molecular Structure; D044367:Phase Transition; D010758:Phosphorus / Q000737:chemistry*; D010777:Photochemistry; D017640:Silicates / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D017640:Silicates; D001464:Barium; D010758:Phosphorus; D005063:Europium