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http://dx.doi.org/10.4191/KCERS.2005.42.5.333

Effect of pH and Drying Temperature on Luminescent Properties of Zn2SiO4:Mn,Al Green Phosphors by Sol-Gel Technique  

Sung, Bu-Yong (Advanced Materials Division, Korea Research Institute of Chemical Technology)
Han, Cheong-Hwa (Department of New Material Engineering, Halla University)
Park, Hee-Dong (Advanced Materials Division, Korea Research Institute of Chemical Technology)
Publication Information
Journal of the Korean Ceramic Society / v.42, no.5, 2005 , pp. 333-337 More about this Journal
Abstract
In order to improve the performance of green emitting phosphors for plasma display panel, the $Zn_2SiO_4:Mn,Al$ phosphors were synthesized using sol-gel technique and studied using SEM and VUV photoluminescence spectrometer. pH values of the starting solutions (pH = 0.5$\~$2.34) were controled by HCl as the catalysis of hydrolysis and wet gels were dried at $80^{\circ}C$ and $120^{\circ}C$, respectively. We investigated the effects of pH and drying temperatures during sol-gel processes. The results indicated that the phosphor prepared at pH = 1 showed the maximum emission intensity in both drying conditions and the effect of pH of the starting solution on morphology were increased with particle size as HCl and phosphor dried at high temperature showed more spherical and smaller particles than at low.
Keywords
Phosphor; pH; Drying temperature;
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