采用高温固相法制备了Ba5-2xCexKx(PO4)3F和Ba3Ce1-xK(PO4)3F∶xTb3+荧光粉, 通过XRD、SEM(含mapping和EDX)、光致激发和发射光谱对其结构、形貌、组成及发光性能进行了研究。实验结果表明, 在紫外光激发下, Ba3CeK(PO4)3F荧光粉发出明亮的蓝光, 而在Ce3+、Tb3+共掺的Ba3Ce1-xK(PO4)3F∶xTb3+荧光粉中观察到有效的Ce-Tb能量传递, 并实现了发光颜色随着Tb3+掺杂浓度的增加逐渐由蓝光转变为蓝绿光并最终转变为绿光的有效调控。当Tb3+掺杂摩尔分数x=0.20时, Ba3Ce1-xK(PO4)3F∶xTb3+中Tb3+的发光强度达到最大。

Ba5-2xCexKx(PO4)3F and Ba3Ce1-xK(PO4)3F∶xTb3+ phosphors were prepared by high temperature solid state method. Their structure, morphology, composition and photoluminescent properties were studied by XRD, SEM(including mapping and EDX), photoluminescence excitation and emission spectra. The results show that Ba3CeK(PO4)3F phosphor emits bright blue light under the excitation of UV light, while the emission of Ba3Ce1-xK(PO4)3F∶xTb3+ phosphor gradually changes from blue light to blue green light and finally to green light as the Tb3+ doping concentration increases. The Ce3+ ions can strongly sensitize the luminescence of Tb3+ ions under UV excitation through the efficient energy transfer process from Ce3+ to Tb3+ ions. The emission intensity of Tb3+ in Ba3Ce1-xK(PO4)3F∶xTb3+ reaches the maximum when the mole concentration of Tb3+ is x=0.20.