졸-겔반응에서 pH 및 R w 제어를 통한 Sr 3-x MgSi 2 O 8 :EU x (0.01≤x≥0.1) 형광체의 발광특성 변화

안중인; 한정화; 김창해; Joong-In Ahn; Cheong-Hwa Han; Chang-Hae Kim

Korean Journal of Materials Research, Vol.15, No.6, 419-425, June, 2005

DOI10.3740/MRSK.2005.15.6.419 Export Citation

졸-겔반응에서 pH 및 R w 제어를 통한 Sr 3-x MgSi 2 O 8 :EU x (0.01≤x≥0.1) 형광체의 발광특성 변화

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

안중인^{1, 2, †}, 한정화³, 김창해⁴

¹한국화학연구원 화학소재연구부
²성균관대학교 화학과
³한라대학교 신소재공학과
⁴한국화학연구원 화확소재연구부

Joong-In Ahn^{1, 2, †}, Cheong-Hwa Han³, and Chang-Hae Kim¹

¹Advanced Materials Division, Korea Research Insititute of Chemical Technology, P.O. Box 107, Yuseong-gu, Daejeon 305-600, Korea
²Department of Chemistry, Sungkyunkwan University, Suwon, Gyeonggi, 440-746, Korea
³Department of New Materials Engineering, Halla University, Wonju 220-712, Korea

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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 4 OH) . 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 ? C .

Keywords:Sol-gel;Phosphor;UV LED

[References]

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[1] Kim JD, Tech Trend Report, (2004) (2004)

[2] Sohn SJ, Bull. KIEEME, 14(11), 20 (2001)

[3] Hong CH, Bull. KIEEMME, 14(11), 25 (2001)

[4] Park DG, Polym. Sci. Technol., 8(3), 248 (1997)

[5] Yu HF, Wang SM, J. Non-Cryst. Solids, 261, 260 (2000)

[6] Park WK, Ceramist., 2(1), 16 (1999)

[7] Keefer KD, Better Ceramics through Chemistry, ed., North Holland, New York (1984), 15-24 (1984)

[8] Seong BY, Han CH, Park HD, Kim DS, J. Kor. Ceram. Soc., 38, 337 (2001)

[9] Boonstra AH, Baken JME, J. Non-Cryst. Solids, 122, 171 (1990)

[10] Ozaki, Ceramics, 21, 102 (1986)