1. Effects of Y/Gd Ratio and Boron Excess on Vacuum Ultraviolet Characteristics and Morphology of (Y,Gd)BO3:Eu Phosphor Particles Prepared by Spray Pyrolysis
- Author
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Hye Young Koo, Seung Kwon Hong, Dae Soo Jung, Kyeong Youl Jung, and Yun Chan Kang
- Subjects
Morphology (linguistics) ,Materials science ,Photoluminescence ,Physics and Astronomy (miscellaneous) ,Inorganic chemistry ,General Engineering ,Analytical chemistry ,General Physics and Astronomy ,chemistry.chemical_element ,Phosphor ,Yttrium ,Boric acid ,chemistry.chemical_compound ,chemistry ,Reactivity (chemistry) ,Boron ,Stoichiometry - Abstract
(Y1-xGdx)BO3:Eu (0≤x≤1) phosphor particles were prepared by spray pyrolysis. The optimal amount of boric acid for the high photoluminescence intensity of there particles differed depending on the molar ratio of Y to Gd. With decreasing Y/Gd molar ratio, an increasing amount of excess boric acid was required. The difference in excess quantity of boric acid, which was demanded for the highest photoluminescence intensity according to the Y/Gd ratio, influenced the morphology and mean size of the (Y,Gd)BO3:Eu phosphor particles. The (Y1-xGdx)BO3:Eu (0≤x≤1) phosphor particles had a regular morphology. The mean sizes of the GdBO3:Eu and YBO3:Eu phosphor particles were 1.4 and 1 µm, respectively. The high reactivity of boron and yttrium components produced YBO3:Eu phosphor particles with high photoluminescence intensities by spray pyrolysis using a spray solution with a stoichiometric amount of boric acid.
- Published
- 2007