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Issue 23, 2013
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Crystal structure and optical properties of white light-emitting Y2WO6:Sm3+ phosphor with excellent color rendering

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Abstract

A new single-phased white light-emitting phosphor, Y2WO6:Sm3+, was synthesized via conventional solid-state reaction calcining in air. The Y2WO6:Sm3+ samples were characterized using powder X-ray diffraction and refined with Rietveld methods. The phosphors exhibit a green emission from the host as well as a red emission from the dopant under ultraviolet excitation (300–380 nm). The color coordinates can be gradually tuned from green (0.247, 0.380) through white-light (0.319, 0.382) toward orange (0.335, 0.390) in the visible spectral region by systematically changing the Sm3+ dopant concentration. In addition, combining a 365 nm near-ultraviolet chip and Y2WO6:0.02Sm3+ phosphor produced a white light-emitting diode, which exhibited an excellent color rendering index (Ra) of 92.3, a correlated color temperature of 5916 K and CIE coordinates of x = 0.3246, y = 0.3242.

Graphical abstract: Crystal structure and optical properties of white light-emitting Y2WO6:Sm3+ phosphor with excellent color rendering

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Supplementary files

Article information


Submitted
12 Feb 2013
Accepted
04 Apr 2013
First published
09 May 2013

RSC Adv., 2013,3, 9029-9034
Article type
Paper

Crystal structure and optical properties of white light-emitting Y2WO6:Sm3+ phosphor with excellent color rendering

H. Qian, J. Zhang and L. Yin, RSC Adv., 2013, 3, 9029 DOI: 10.1039/C3RA40742J

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