Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Change of Luminescent Properties of Phosphors Through pH and Rw Control in Sol-gel Reaction

졸-겔반응에서 pH 및 Rw제어를 통한 Sr3-xMgSi2O8:EUx (0.01≤x≥0.1) 형광체의 발광특성 변화

  • 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)
  • 안중인 (한국화학연구원 화학소재연구부, 성균관대학교 화학과) ;
  • 한정화 (한라대학교 신소재공학과) ;
  • 김창해 (한국화학연구원 화학소재연구부)
  • Published : 2005.06.01
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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$.

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