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http://dx.doi.org/10.3740/MRSK.2004.14.10.749

Synthesis of Phosphor for Light-Emitting Diodes by Sol-Gel Method  

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)
Publication Information
Korean Journal of Materials Research / v.14, no.10, 2004 , pp. 749-753 More about this Journal
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.
Keywords
phosphor; sol-gel; LED;
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