Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Synthesis of Phosphor for Light-Emitting Diodes by Sol-Gel Method

졸-겔법을 이용한 LED용 형광체의 합성

  • Ahn Joong-In (Advanced Materials Division, Korea Research Institute of Chemical Technology, Department of Chemistry, Sungkyunkwan University) ;
  • Han Cheong-Hwa (Department of New material Engineering, Halla University) ;
  • Park Jung-Kyu (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Kim Chang-Hae (Advanced Materials Division, Korea Research Institute of Chemical Technology)
  • 안중인 (한국화학연구원 화학소재연구부, 성균관대학교 화학과) ;
  • 한정화 (한라대학교 신소재공학과) ;
  • 박정규 (한국화학연구원 화학소재연구부) ;
  • 김창해 (한국화학연구원 화학소재연구부)
  • Published : 2004.10.01
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Abstract

In this study, we attempt to synthesize the $Sr_{3}SiO_{5}:Eu$ yellow phosphor by sol-gel technique. Based on the blue emitting diodes as primary light source, white light emitting diodes have been manufactured using the $Sr_{3}SiO_{5}:Eu$ yellow phosphor as the luminescent material. Luminescent efficiency of yellow phosphor as well as that of blue LED is very important factor to enhance the luminescent efficiency of white LED. In order to improve the luminescent efficiency, we have synthesized the $Sr_{3}SiO_{5}:Eu$ phosphor by sol-gel technique. To research optimum condition of gelation reaction, the ratio of $H_{2}O$ to TEOS was fixed as 60:1. When the drying temperature was at $100^{\circ}C$, emission intensity was better than at $70^{\circ}C$. The critical $Eu^{2+}$ concentration was estimated to be about 0.05 mol and sintering temperature at $1300^{\circ}C$ was indicated best emission intensity.

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References

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