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http://dx.doi.org/10.3740/MRSK.2005.15.6.419

Change of Luminescent Properties of Phosphors Through pH and Rw Control in Sol-gel Reaction  

Ahn Joong-In (Advanced Materials Division, Korea Research Institute of Chemical Technology, YuSong Post Office, Department of Chemistry , Sungkyunkwan University)
Han Cheong-Hwa (Department of New Material Engineering, Halla University)
Kim Chang-Hae (Advanced Materials Division, Korea Research Institute of Chemical Technology, YuSong Post Office)
Publication Information
Korean Journal of Materials Research / v.15, no.6, 2005 , pp. 419-425 More about this Journal
Abstract
In this paper, we describe the luminescent properties of the phosphors synthesized via sol-gel technique. When the phosphor prepared by sol-gel technique, reaction factors, such as pH condition, $R_w$ and drying temperature affected the luminescent intensity, particle size and morphology of final product. Therefore, we attempt to control these reaction factors in order to improve the luminescent efficiency of phosphors. As a result of our study, when the acid catalyst (HCl) was used, emission intensity was higher than the case of base catalyst $(NH_4OH)$. The product prepared at $R_w=60$ indicated the maximum intensity. As the increase of the $R_w$ value, the particle was agglomerated and emission intensity was decreased. Finally, optimum drying temperature of gel was found to be$ 180^{\circ}C$.
Keywords
Sol-gel; Phosphor; UV LED;
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Times Cited By KSCI : 3  (Citation Analysis)
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1 W. K. Park, Ceramist., 2(1), 16 (1999)
2 K. D. Keefer, Better Ceramics through Chemistry, ed., North Holland, New York (1984), 15-24
3 D. G. Park, Poly. Sci. Tech., 8(3), 248 (1997)
4 H.-F. Yu and S.-M. Wang, J. Non-cryst. Solids, 261, 260 (2000)   DOI   ScienceOn
5 A. H. Boonstra and J. M. E. Baken, J. Non-cryst. Solids, 122, 171 (1990)   DOI   ScienceOn
6 C. H. Hong, Bull. KIEEMME, 14(11),25 (2001)   과학기술학회마을
7 S. J. Sohn, Bull. KIEEME, 14(11), 20 (2001)   과학기술학회마을
8 J. D. Kim, Tech Trend Report, (2004)
9 Ozaki, Ceramics, 21, 102 (1986)
10 B. Y. Seong, C. H. Han, H. D. Park and D. S. Kim, J. Kor. Ceram. Soc., 38, 337 (2001)   과학기술학회마을