【摘要】 通过高温固相法合成Sr₃La A_xV_3-xO₁₂∶Eu³⁺（A=Mo,W）荧光粉,利用MoO₄^2-和WO₄^2-取代基质中部分VO₄^3-,改变基质组成和结构,进而影响基质和激活剂Eu³⁺离子的发光性能。采用X射线衍射（XRD）、扫描电子显微镜（SEM）和荧光分光光度计对所合成样品的物相、形貌、荧光性能及荧光寿命进行表征。研究表明,MoO₄^2-和WO₄^2-的部分掺杂对基质发光位置和强度均有影响,能明显减弱VO₄^3-的发光,但对Eu³⁺离子发光影响不大,添加电荷补偿剂F^-可以加强VO₄^3-对Eu³⁺离子的能量传递。通过调整基质VO₄^3-发光和Eu³⁺离子发光,可以得到单一基质的白光荧光粉。初步探讨了阴离子掺杂对Eu³⁺离子红光发射增强的机理。更多还原

【Abstract】 Sr₃LaA_xV_3-xO₁₂∶Eu³⁺（ A = Mo,W） phosphors were synthesized by a high temperature solid state method. X-ray diffraction（ XRD）,scanning electron microscopy（ SEM）,photoluminescence spectra,and lifetime were utilized to characterize the samples. Partial substitution of VO₄^3- by MoO₄^2- and WO₄^2- in Sr₃LaA_xV_3-xO₁₂∶ Eu³⁺（ A = Mo,W） can weaken the emission of VO₄^3-,and cause a red shift of emission position,but has little influence on the emission of Eu³⁺ion. After charge compensation by adding F-in Sr₃LaMo_xF_xV_3-xO₁₂∶ Eu³⁺,the excitation energy of VO₄^3- can be transferred to Eu³⁺ion and then enhance the emission of Eu³⁺ion. A white phosphor of Sr₃LaA_xV_3-xO₁₂∶Eu³⁺（A = Mo,W） can be obtained by adjusting the emissions of the VO₄^3- and Eu³⁺ions. The enhancement mechanism of the red emission of Eu³⁺by anion substitution was briefly discussed.更多还原