Article Details


Doping Level Effect on the Luminescence Efficiency of Tb3+/Tb4+-Doped BaWO4 Phosphors Prepared by a Sol-Gel Process

[ Vol. 8 , Issue. 2 ]

Author(s):

H.-Y. He   Pages 114 - 118 ( 5 )

Abstract:


Background: Rare earth ions in many matrices can emit various luminescences under ultraviolet and/or infrared excitation and so have widely studied for many luminescence applications such as in fluorescent lamps, cathode ray tubes, X-ray intensifying screens, etc. Terbium (Tb) ion is commonly one of the trivalent rare earth ions and widely used for green phosphors material.

Method: The Tb-doped BaWO4 phosphor powders with Tb content of 0–7.5 at.% were fabricated with a sol-gel method. X-ray diffraction analysis, scanning electron microscopy, and photoluminescence spectra analysis were used to characterize the microstructural and photoluminescence efficiency.

Conclusion: The effect of Tb doping level was studied. Granular particle morphology and decreased nano-scale average particles size with increasing Tb-doping level were observed. The Tb3+/Tb4+ in the BaWO4 matrix showed green emission with cool color temperature of 12764 K. A maximal doping level of Tb3+/Tb4+ cation was observed for a highest emission efficiency of Tb3+/Tb4+ cation.

Keywords:

Nanocrystalline materials, functional, cation doping, Luminescence.

Affiliation:

College of Material Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021

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