Abstract：
The GdAl3(BO3)4:xPr3+ (0 ≤ x ≤ 5.0 mol%) phosphors were prepared through solid state reaction route and characterized for various lighting applications. Powder X-ray diffraction investigations revel rhombohedral structure matched to JCPDS card no. 83-1907. The morphological studies confirm the agglomeration of particles with different size and shape. The emission spectra show various emission transitions originating from Pr3+:(3P1,0, 1D2) emission states to their lower lying energy states upon 274 nm NUV excitation with a red shift for x > 0.5 mol%. The colour perception analysis results an intense red luminescence due to efficient energy transfer from Gd3+ to Pr3+ ions. The temperature-dependent luminescence investigations show good thermal stability even beyond 150°C with an activation energy of 0.24 eV. The observed experimental results show the potentiality of GdAl3(BO3)4:0.5 Pr3+ phosphor for red emitting devices and red component in phosphor converted white LEDs.
摘要：
通过固态反应路线制备了GdAl3（BO3）4：xPr3（0≤x≤5.0mol％）磷光体，并针对各种照明应用进行了表征。粉末X射线衍射研究与JCPDS卡号匹配的菱形结构。83-1907.形态学研究证实了具有不同尺寸和形状的颗粒的团聚。发射光谱显示了在274nmNUV激发时从Pr3：（3P1,0，1D2）发射状态到其较低能量状态的各种发射跃迁，x>0.5mol％的红移。由于从Gd3+到Pr3+离子的有效能量转移,颜色感知分析导致强烈的红色发光。与温度相关的发光研究显示出即使在150°C以上也具有良好的热稳定性，活化能为0.24eV。观察到的实验结果表明了GdAl3（BO3）4：0.5Pr3荧光粉用于红色发光器件的潜力，以及荧光粉转换的白光LED中的红色成分。
