Bluish-green color emitting Ba2Si3O8:Eu2+ ceramic phosphors for white light-emitting diodes.
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.
Xiao
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F
MOE Key Lab of Specially Functional Materials and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641, PR China.
Xue
Y N
YN
Zhang
Q Y
QY
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
D017640:Silicates; D001464:Barium; D010758:Phosphorus; D005063:Europium