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Synthesis and Screening of the System <TEX>$SrO-Gd_2O_3-Al_2O_3$</TEX>Doped with Tb by Polymerized-Complex Combinatorial Chemistry
Synthesis and Screening of the System $SrO-Gd_2O_3-Al_2O_3$Doped with Tb by Polymerized-Complex Combinatorial Chemistry
Journal of the Korean Chemical Society. 2001. Oct, 45(5): 461-469
  • Published : October 00, 2001
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Jeong, Yang Sun
Kim, Chang Hae
Park, Hee Dong
Park, Joon Taik
Kang, Sung Kwon

Abstract
The combinatorial approach has been applied to discover and optimize the composition of the novel or enhanced materials. In this study, we screened the optimum composition of the system SrO-Gd$_2$O$_3$-Al$_2$O$_3$ doped with $Tb^{3+}$ by a polymerized-complex combinatorial chemistry method. Mixtures with compositions of Sr, Gd and Al component that is in the range from 0 to 1 in about 0.05 increments could be tested. The sample powders were synthesized by a polymerized complex method. To prepare appropriately polymeric precursors, we used the metallic nitrates, citric acid and ethylene glycol. The luminescence properties of the synthesized powders are investigated using the UV and VUV (Vacuum-UV: 147 nm) photoluminescence spectrometer. In addition, the crystallinity and morphology of powder were monitored by X-ray diffraction spectrometer and scanning electron microscopy. In result of VUV PL works, there are good luminescent samples with the composition of 0.595 < x < 0.733 and 0.016 < y < 0.017 in Gd1-x-yAlxTbyO$\delta$ and 0.049 < x < 0.064 and 0.02 < y < 0.039 in $Sr_xAl_{1-x-y}Tb_yO_$\delta$$, their materials can be applicable to plasma display panels as the green phosphor.