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

Author(s): H.-Y. He*.

Journal Name: Micro and Nanosystems

Volume 8 , Issue 2 , 2016

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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.

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Article Details

VOLUME: 8
ISSUE: 2
Year: 2016
Page: [114 - 118]
Pages: 5
DOI: 10.2174/1876402909666170126122221
Price: $58

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