Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5439163 | Ceramics International | 2017 | 26 Pages |
Abstract
A novel tunable red to yellow emitting phosphor, (Ca, Ba)4(PO4)2O:Eu2+ is reported that displays a broad emission from 500 to 800Â nm, and its emitting color can be adjusted from red to yellow by changing Ba2+ doping concentration. X-ray powder diffraction (XRD) analysis confirmed the phase formation. Excitation and emission spectra, and concentration dependence of emission intensity of the phosphor were investigated. The results showed that the emission peak wavelength take blue-shifted from 640 to 545Â nm and the color hue can be tuned from red to yellow with increasing Ba2+ concentration. When single-phase (Ca3.85Ba0.10)(PO4)2O:0.05Eu2+ phosphor is pumped by a blue InGaN light-emitting diode, we obtain white light with color rending index (Ra) between 84.0 and 90.6 and color temperatures between 4000 and 5500Â K, which suggests that this material is competitive as a color conversion material for solid state lighting.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Hua Yu, Bingxue Yao, Degang Deng, Leifeng Chen, Hongting Zhao, Yinqun Li, Youjie Hua, Shiqing Xu,