In this research, Dy3+-doped Lu3Ga2Al3O12 phosphor was synthesized by using the combustion method with a solid state reaction at 1500 °C for 12 hours in a furnace. Host materials such as Lu2O3, Ga2O3, Al2O3 and activator such as Dy2O3 were used. The crystal structure and the lattice constants were confirmed by using X-ray diffraction. The emission spectrum of the Dy3+-doped Lu3Ga2Al3O12 phosphor under excitations by UV light and X-rays showed peaks at 482 nm, 580 nm, 670 nm and 760 nm due to electron transitions from the 4F9/2 to the 6Hj orbited. The Lu3Ga2Al3O12:Dy3+ phosphor emits blue, green-yellow and red light when excited by UV light and X-rays. The CIE chromaticity diagram for the emission spectrum gives a color close to white, which indicates that Dy3+-doped Lu3Ga2Al3O12 phosphor may be a good material for use in a light-emitting diode. The Lu3Ga2Al3O12:Dy3+ phosphor has a high sensitivity to X-rays and gamma rays because of its high Z-number (Zeff = 57) and density. Therefore, the Lu3Ga2Al3O12:Dy3+ phosphor can be applied for X-ray imaging in medical fields.

中文翻译：

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用于 X 射线成像和白光 LED 的 Dy3+ 掺杂 Lu3Ga2Al3O12 磷光体的发光特性研究

在本研究中，采用燃烧法在 1500 °C 的熔炉中进行 12 小时的固相反应合成了 Dy3+ 掺杂的 Lu3Ga2Al3O12 荧光粉。使用了主体材料如 Lu2O3、Ga2O3、Al2O3 和活化剂如 Dy2O3。晶体结构和晶格常数通过 X 射线衍射确定。由于从 4F9/2 到 6Hj 轨道的电子跃迁，Dy3+ 掺杂 Lu3Ga2Al3O12 荧光粉在紫外光和 X 射线激发下的发射光谱在 482 nm、580 nm、670 nm 和 760 nm 处出现峰值。Lu3Ga2Al3O12:Dy3+ 荧光粉在被紫外光和 X 射线激发时会发出蓝光、绿黄光和红光。发射光谱的 CIE 色度图给出接近白色的颜色，这表明 Dy3+ 掺杂的 Lu3Ga2Al3O12 荧光粉可能是用于发光二极管的良好材料。Lu3Ga2Al3O12:Dy3+ 荧光粉由于其高 Z 数 (Zeff = 57) 和密度而对 X 射线和伽马射线具有高灵敏度。因此，Lu3Ga2Al3O12:Dy3+荧光粉可用于医学领域的X射线成像。