Red/Blue-Shift Dual-Directional Regulation in Blue-Emitting Ca0.8Ba1.2SiO4:Eu2+ Phosphor on Incorporation of Eu2+/Mg2+ Ions
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- 作者：Lihua He ; Xiao Zou ; Tao Wang ; Qiaoji Zheng ; Na Jiang…
- 关键词：Ca0.8Ba1.2SiO4 ; Eu2+ ; Mg doping ; phosphor ; white LEDs
- 刊名：Journal of Electronic Materials
- 出版年：2017
- 出版时间：March 2017
- 年：2017
- 卷：46
- 期：3
- 页码：1777-1786
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Optical and Electronic Materials; Characterization and Evaluation of Materials; Electronics and Microelectronics, Instrumentation; Solid State Physics;
- 出版者：Springer US
- ISSN：1543-186X
- 卷排序：46
文摘
Blue-emitting phosphors with composition (Ca0.8Ba1.2)1−xMgxSiO4:yEu2+ (x = 0 to 0.11, y = 0.01 to 0.08) have been synthesized via a high-temperature solid-state reaction route and the effects of Mg2+ and Eu2+ codoping on their morphology, crystal structure, and luminescence properties were investigated. For (Ca0.8Ba1.2)1−xMgxSiO4:0.04Eu2+, the color changed from light-blue to deep-blue region with increasing Mg2+ content from x = 0 to x = 0.11. For (Ca0.8Ba1.2)0.93Mg0.07SiO4:yEu2+, the emission band showed the opposite shift with increasing y from 1% to 8%. Interestingly, increasing Mg2+ addition led to significant reduction in the full-width at half-maximum (FWHM) from 100 nm to 70 nm. Compared with Mg-free samples, the emission intensity of the Mg-containing material with x = 0.07 was enhanced by ∼100%. The optimum doping levels of Mg2+ and Eu2+ were 0.07 and 0.02 for (Ca0.8Ba1.2)1−xMgxSiO4:0.04Eu2+ and (Ca0.8Ba1.2)0.93Mg0.07SiO4:yEu2+, respectively. These results indicate that such materials could be good candidate blue-emitting phosphors for use in solid-state lighting and displays.
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