Title: Doping level effect on the luminescence efficiency of Sm³⁺-doped BaWO₄ phosphors prepared by sol-gel process

Authors: H-Y. He

Addresses: College of Material Science and Engineering, Shaanxi University of Science and Technology, 710021, China

Abstract: The Sm-doped BaWO₄ phosphor powders with Sm 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 characterise the microstructural and photoluminescence efficiency. The effect of Sm doping level was studied. A granular particle morphology and decreased nanoscale average particles size with increasing Sm-doping level were observed. The matrix showed weak violet-blue emission. The Sm³⁺ in the BaWO₄ matrix showed red emission that is obviously stronger than violet-blue emission of the matrix. A maximal doping level of Sm³⁺ cation was observed for a highest emission efficiency of Sm³⁺ cation.

Keywords: nanocrystalline materials; functional; cation doping; samarium; Sm doping; phosphors; microstructure; efficiency; rare earth; sol-gel; doping level; luminescence efficiency; barium tungstate; BaWO4; nanoparticles; nanotechnology.

DOI: 10.1504/IJMSI.2016.079652

International Journal of Materials and Structural Integrity, 2016 Vol.10 No.1/2/3, pp.1 - 10

Received: 22 Aug 2015
Accepted: 06 Aug 2016
Published online: 06 Oct 2016 *

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