Low Temperature Preparation of Ca0.5Sr0.5S · 0.001CeS2
Phosphor Thin Films Through Sol-Gel Processing

Kouji MORIYA, Yoshihiro TATSUKAWA, Masahiro TOYODA* and Ryuichi MORIMO†

Fukui National College of Technology; Geshi, Sabae-shi
916-8507 Japan
† Miyakonojyou National College of Technology; Yoshio,
Miyakonojyou-shi 885-8567 Japan

Ca, Sr, Ce complex alkoxide solution was prepared from Ca(NO3)2 · 4H2O, Sr(NO3)2 and Ce(NO3)3 · 6H2O with ethylene glycol through sol-gel processing. Ca, Sr, Ce gel films were deposited on a silica glass substrate by spin coating method using the complex alkoxide solution. Ca0.5Sr0.5S · 0.001CeS2 phosphor thin films were formed by firing at 750 °C in flow H2S gas. The emission spectrum of Ca0.5Sr0.5S · 0.001CeS2 phosphor thin films were detected nearly at 500 nm. It was equivalent to emission spectrum of Ca0.5Sr0.5S · 0.001CeS2 phosphor prepared by solid state reaction. Amorphous Ca0.5Sr0.5S · 0.001CeS2 thin film formed at 600 °C also exhibited emission spectra, which were similar to those of crystalline Ca0.5Sr0.5S · 0.001CeS2 thin films fired at 750 °C.


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