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Fine Size YAG:Tb Phosphor Particles Prepared by Spray Pyrolysis  

Lee, Hyo Jin (Department of Chemical Engineering, Konkuk University)
Hong, Seung Kwon (Department of Chemical Engineering, Konkuk University)
Jung, Dae Soo (Department of Chemical Engineering, Konkuk University)
Kang, Yun Chan (Department of Chemical Engineering, Konkuk University)
Jung, Kyeong Youl (Advanced Materials Division, Korea Research Institute of Chemical Technology)
Publication Information
Korean Chemical Engineering Research / v.43, no.3, 2005 , pp. 407-411 More about this Journal
Abstract
YAG:Tb($Y_3Al_5O_{12}:Tb$) phosphor particles were prepared by spray pyrolysis from spray solution containing various types of flux materials. The effects of type of flux, organic material and post-treatment temperature on the characteristics of morphology, crystallinity and photoluminescence of YAG:Tb phosphor particles were investigated. Citric acid and ethylene glycol used as organic additive improved the photoluminescence intensity of the YAG:Tb phosphor particles without destruction of the morphology after post-treatment at high temperature. However, the spherical shape of the precursor particles obtained by spray pyrolysis from spray solution containing high amount of flux material disappeared after post-treatment at $1300^{\circ}C$. YAG:Tb phosphor particles prepared from spray solution containing lithium carbonate flux had fine size and regular morphology after post-treatment. Lithium carbonate used as flux material was also efficient in improvement of the photoluminescence intensity of the YAG:Tb phosphor particles. The optimum photoluminescence intensity of the YAG:Tb phosphor particles prepared from spray solution containing lithium carbonate flux was 189％ of that of the phosphor particles prepared from spray solution without flux material.
Keywords
Phosphor; Spray Pyrolysis; Garnet Phosphor; Nano Phosphor;
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