Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10640067 | Materials Science and Engineering: B | 2005 | 6 Pages |
Abstract
Spherical-shape Zn2SiO4:Mn phosphor particles with the mean particle size from submicron to micron sizes were prepared by ultrasonic spray pyrolysis. A droplet separator was introduced to control the size distribution of the phosphor particles with spherical shape. The Zn2SiO4:Mn phosphor particles with 13 mol% doping concentration of manganese have decay time and have photoluminescence intensities comparable with those of the latest commercial product prepared by the solid state reaction method. All the phosphor particles prepared from the solution above 0.2 M have spherical shape and non-aggregation characteristics at the optimized post-treatment conditions for the maximum photoluminescence intensity. The size of the phosphor particles was increased from 0.65 to 1.25 μm as the solution concentration was changed from 0.2 to 2 M. The phosphor particles prepared from the solutions above 0.2 M have photoluminescence intensities comparable with that of the latest commercial product. The phosphor layer formed using the phosphor particles with spherical shape and fine size (1 μm) have uniform surface and dense structure. While the phosphor layer formed using the latest commercial product has rough surface morphology and coarse structure.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Chang Hee Lee, Yun Chan Kang, Kyeong Youl Jung, Joong Gill Choi,