Influence of Mg2+/Ga3+ doping on luminescence of Y3Al5O12:Ce3+ phosphors |
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| Authors: | Yuguo Yang Bing Liu Yuanyuan Zhang Xianshun Lv Lei Wei Jianhua Xu Huadi Zhang Xuping Wang Cong Zhang Jing Li |
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| Affiliation: | 1.Advanced Materials Institute,Qilu University of Technology (Shandong Academy of Sciences),Jinan,China;2.Qilu University of Technology (Shandong Academy of Sciences), Key Laboratory for Light Conversion Materials and Technology of Shandong Academy of Sciences,Jinan,China;3.Qilu University of Technology (Shandong Academy of Sciences), Shandong Provincial Key Laboratory for High Strength Lightweight Metallic Materials,Jinan,China |
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| Abstract: | Mg2+/Ga3+ doped Y3Al5O12:Ce3+ phosphors were synthesized through a solid state reaction. The phase and luminescent of the synthesized phosphors were investigated. For Ga3+ codoped Y2.96Ce0.04Al(5?x)GaxO12 phosphors, the emission intensity increases with the increase of Ga3+ concentration up to Y2.96Ce0.04Al4.80Ga0.20O12 and then decreases with a further increase of Ga3+ concentration, but the emission peak shifts to shorter wavelength continuously in the Ga3+ doping concentration range of 0.05–0.25. For Mg2+/Ga3+ codoped Y2.96Ce0.04Al(4.8?y)Ga0.20MgyO12 phosphors, the emission intensity decreases and the emission peak shifts to longer wavelength continuously in the Mg2+ doping concentration range of 0.02–0.12. The emission spectra of Y2.96Ce0.04Al(4.8?y)Ga0.20MgyO12 phosphors demonstrate that the codoped Mg2+/Ga3+ ions not only induce the enhancement of Y2.96Ce0.04Al5O12 emission intensity but also lead to the red shift of Y2.96Ce0.04Al5O12 emission peak. The decay lifetimes decrease in Mg2+/Ga3+ codoped Y2.96Ce0.04Al5O12 phosphors due to defects formed by substitutions of Y3+ by Mg2+/Ga3+. |
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