期刊
INORGANIC CHEMISTRY COMMUNICATIONS
卷 150, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.inoche.2023.110470
关键词
Orange-red phosphor; Silicate; Eu3+; Photoluminescence; Thermal stability
We have successfully designed and synthesized a series of novel orange-red phosphors Sr3-2xAl2Si3O12:xEu3+,xLi+ (0.04 <= x <= 0.18), which can be effectively excited by ultraviolet and blue light. Among these phosphors, Sr2.8Al2Si3O12:0.1Eu3+,0.1Li+ exhibits excellent thermal stability and a high color purity of 97.52% with color coordinates in the orange-red region (0.58,0.40).
It is still a challenge to develop orange-red phosphors with high performance, good thermal stability and high color purity. We successfully designed and synthesized a series of novel orange-red phosphors Sr3-2xAl2Si3O12: xEu3+,xLi+ (0.04 <= x <= 0.18), which can be effectively excited by ultraviolet and blue light. The fluorescence emission spectra of phosphors Sr3-2xAl2Si3O12:xEu3+,xLi+ are composed of several peaks at 500-750 nm, which belong to the electronic transition of 5D0 -> 7FJ (J = 0,1,2,3,4) of Eu3+. Phosphor Sr2.8Al2Si3O12:0.1Eu3+,0.1Li+ has excellent thermal stability, when the temperature is as high as 418 K, the fluorescence emission intensity remains 77.81%, and the activation energy Ea = 0.2665 eV. The color coordinates of phosphors Sr3-2xAl2Si3O12: xEu3+,xLi+ are all located in the orange-red region (0.58,0.40), and the color purity is as high as 97.52%. These results show that phosphor Sr2.8Al2Si3O12:0.1Eu3+,0.1Li+ is a potential orange-red phosphor which can be effectively excited by ultraviolet light and blue light to obtain white light.
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