采用溶胶凝胶-燃烧法合成了系列不同掺杂浓度Y3+和Gd3+的LaBO3∶Eu3+发光粉, 对其结构、形貌和发光性能进行了表征。XRD研究结果表明: 发光粉的结构与基质掺杂离子的种类和掺杂浓度有关系。荧光光谱结果表明: 适量比例Y3+和Gd3+离子掺杂将提高LaBO3∶Eu3+发光粉的发光强度。Y3+和Gd3+离子最佳掺杂摩尔分数分别为1.5%和12.5%。 5D0→7F2与5D0→7F1跃迁发射的相对强度比值说明: 掺杂改变LaBO3∶Eu3+中Eu3+局域环境的对称性。发光性能改变主要受晶体结构、掺杂离子电负性影响。Gd3+离子掺杂更有利于发光粉结构稳定性和发光性能的改善。

A series of LaBO3∶Eu3+ phosphors with Y3+ and Gd3+ ions different doping concentrations were prepared by sol-gel combustion method. The structure, morphology and luminescence are characterized. The results of XRD indicate that the structures of phosphors are related to doping ions and doping concentration of matrix. The results of emission and excitation spectra show that the luminescence intensity of LaBO3∶Eu3+ phosphors is enhanced by appropriate proportion Y3+ and Gd3+ ions doping in hosts. Y3+ and Gd3+ optimum doping mole fraction is 1.5% and 12.5%, respectively. The 5D0→7F2/5D0→7F1 relative emission intensity ratios show that the local symmetry environment around Eu3+ ions is changed because of doping ions. The luminescence properties are influenced by the crystal structure and electronegativity of doping ion. In addition, the Gd3+ doping is more advantageous to the stability of structure and improvement of luminescence properties.