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用稀土氧化物硫化法合成了发光体(La_(0.9)Gd_(0.1))_2O_2S:Tb,(La_(0.9)Y_(0.1))_2O_2S:Tb和(Y_(0.8)Gd_(0.2))_2O_2S:Tb,用X射线、阴极射线和254nm 紫外线三种激发方式测试了不同Tb~(3+)离子浓度(每摩尔基质中含0.0001～0.1摩尔Tb~(3+))时,它们的发光性能。测定了它们的发光亮度、发光色度随激活剂Tb~(3+)离子浓度的变化,研究了在这三种发光体中Tb~(3+)离子的~5D_3→~7F_J和~5D_4→~7F_J 的能级跃迁强度随Tb~(3+)离子浓度变化的关系。最后探讨了激活剂 Tb~(3+)离子在这三种发光体中的浓度猝灭机理。
(La_ (0.9) Gd_ (0.1)) _2O_2S: Tb, (La_ (0.9) Y_ (0.1)) _2O_2S: Tb and (Y_ (0.8) Gd_ (0.2)) __2O_2S were synthesized by the rare earth oxide vulcanization method. Tb were synthesized and their luminescent properties were tested with different concentrations of Tb 3+ ions (0.0001-0.1 mol Tb 3+ per mol of substrate) by X-ray, cathodal and 254nm UV excitation methods. Their luminescence intensity and luminescence chromaticity were measured with the change of Tb 3+ ion concentration. The effects of ~ 5D_3 → ~ 7F_J and ~ 5D_4 → ~ 7F_J energy level transition intensity with the Tb ~ (3 +) ion concentration changes. Finally, the quenching mechanism of the concentration of Tb ~ (3+) ions in these three luminophores was discussed.