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Dy3+ doped thermally stable garnet-based phosphors: luminescence improvement by changing the host-lattice composition and co-doping Bi3+

机译：DY3 +掺杂的热稳定石榴石荧光粉：通过改变主机晶格组成和共掺杂Bi3 +来改善发光

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摘要

A series of (Gd1-xYx)(2.94-y)Al5O12:0.06Dy(3+),yBi(3+)(x = 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, y = 0.000, 0.015, 0.030, 0.045, 0.060) phosphors has been prepared by a sol-gel combustion method. X-ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL), diffuse reflection, fluorescence decay curves, temperature-dependent photoluminescence and CIE color coordinates were used to characterize the prepared phosphors. The emission intensity of Dy3+ was greatly improved by co-doping the sensitizer of Bi3+ ions and changing the composition of the matrix via replacing gadolinium with Y3+ ions. The influence of different Y3+ and Bi3+ concentrations on the properties of the phosphor were discussed. The optimized composition was determined to be (Gd0.2Y0.8)(2.835)Al5O12:0.06Dy(3+),0.045Bi(3+). Its intensity is almost double the intensity in YAG: Dy3+,Bi3+, four times stronger than that of GAG: Dy3+, Bi3+ and 15 times stronger than that of YGAG: Dy3+. The band gap and decay curves of the phosphors were investigated to explore the relationship between the intensity and the content of Y3+. In addition, good thermal stability of (Gd0.2Y0.8)(2.835)Al5O12:0.06Dy(3+),0.045Bi(3+) was observed according to the temperature-dependent PL spectra. The enhanced luminescence intensity and good thermal stability of the phosphor are conducive to improved application in the field of white light-emitting diodes (W-LEDs).
机译：一系列（GD1-XYX）（2.94-Y）Al5O12：0.06dy（3 +），YBI（3 +）（x = 0.3,0.4,0.5,0.6,0.7,0.8,0.9，Y = 0.000,0.015，通过溶胶 - 凝胶燃烧方法制备了0.030,0.045,0.060）的磷光体。 X射线衍射（XRD），扫描电子显微镜（SEM），光致发光（PL），弥漫反射，荧光衰减曲线，温度依赖性光致发光和CIE颜色坐标用于表征制备的磷光体。通过共掺杂Bi3 +离子的敏化剂并通过用Y3 +离子更换钆改变基质的组成而改善DY3 +的发射强度。讨论了不同Y3 +和Bi3 +浓度对磷光体性质的影响。确定优化的组合物（Gd0.2Y0.8）（2.835）Al5O12：0.06（3 +），0.045（3+）。它的强度几乎是YAG：DY3 +，BI3 +，比Gag的四倍强于Gag：Dy3 +，Bi3 +和15倍，比Ygag：DY3 +更强。研究了磷光体的带隙和衰减曲线，探讨了Y3 +的强度和含量之间的关系。此外，根据温度依赖性PL光谱，观察到（2.835）（2.835）Al5O12：0.06（3 +），0.045bi（3+）的良好的热稳定性。磷光体的增强的发光强度和良好的热稳定性有利于改进在白色发光二极管（W-LED）领域的应用。

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  • 来源
    《RSC Advances》 |2016年第38期|共8页
  • 作者

    Tian Lu; Shen Jialin; Xu Tian; Wang Lixi; Zhang Le; Zhang Jing; Zhang Qitu;

  • 作者单位

    Nanjing Tech Univ Coll Mat Sci &

    Engn Nanjing 210009 Jiangsu Peoples R China;

    China Geol Survey Nanjing Ctr Nanjing 210016 Jiangsu Peoples R China;

    Nanjing Tech Univ Coll Mat Sci &

    Engn Nanjing 210009 Jiangsu Peoples R China;

    Nanjing Tech Univ Coll Mat Sci &

    Engn Nanjing 210009 Jiangsu Peoples R China;

    Jiangsu Normal Univ Sch Phys &

    Elect Engn Jiangsu Key Lab Adv Laser Mat &

    Devices Xuzhou 221116 Peoples R China;

    China Geol Survey Nanjing Ctr Nanjing 210016 Jiangsu Peoples R China;

    Nanjing Tech Univ Coll Mat Sci &

    Engn Nanjing 210009 Jiangsu Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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