采用共沉淀法制备了Er3+,Yb3+共掺Gd2WO6荧光粉, 通过对浓度猝灭曲线的分析表明Er3+间的相互作用类型为电偶极-电偶极相互作用。分析了样品荧光的温度效应并得到摩尔分数为5%和20%的Er3+掺杂样品的激活能ΔE分别为0.27和0.29 eV。利用Er3+的2H11/2和4S3/2能级跃迁至基态的荧光强度比随温度变化这一特性研究了两个不同Er3+掺杂浓度样品的下转换温度效应, 结果表明该材料体系具有良好的温度传感特性。

The Er3+,Yb3+ co-doped Gd2WO6 phosphors were prepared with co-precipitation method. Electric dipole-dipole interaction between Er3+ in Er3+,Yb3+-doped Gd2WO6 phosphor is demonstrated from the curve of concentration quenching. By analyzing the temperature character of the phosphors, the activation energy of samples with 5% and 20% doping mole fractions is obtained and the experimental values are 0.27 and 0.29 eV, respectively. The temperature characters of samples with two different doping concentrations are analyzed by means of fluorescence intensity ratio from 2H11/2→4I15/2 and 4S3/2→4I15/2 radiative transitions, indicating good temperature sensor for the present materials.