Abstract

Composition variation in optimized solid state reaction conditions has been done to achieve intense green emission in YTb x BO 3 phosphor under UV and VUV (147 nm resonant Xe*, 172 nm Xe 2* excimer band) excitation. Inert interface layer created by fabricating a shell of silica nanoparticles over individual phosphor grain protected the phosphor surface from deterioration and oxidation of luminescent ion (Tb 3+) thus completely arresting phosphor degradation. At optimum Tb content of 20 mol%, integrated photoluminescence intensity of developed YTb x BO 3 phosphor is four times higher than commercial green YBT. With short decay time of 4 ms, YTb x BO 3 core–nano silica shell green emitting phosphor has great application potential in PDP panel and phosphor coated Xe lamps.

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