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为了寻找新的荧光粉基质材料,本文研究了紫外线、阴极射线和 X 射线激发下,三价铕激活的(Y,Gd)_2O_2S 二元体系的发射光谱、发光颜色和发光亮度等发光特性随基质组成变化的规律性,并研究了三价铕离子浓度对固溶体(Y_(0.7)Gd_(0.2))_2O_2S 发光性能的影响。结果表明,在 Y_2O_2S 中加入 Gd,明显地提高了在阴极和 X 射线激发下的发光亮度。Eu~(3+)离子激活的稀土硫氧化物是一类高效率的荧光材料,早在六十年代就已将 Y_2O_2S:Eu 用作彩色电视显象管的红色荧光粉。近年来又有人将 Eu~(3+)激活的硫氧化钇及稀土硫氧化物固溶体用于低压显示器件中,但 Eu~(3+)激活的稀土硫氧化物固溶体的研究文献中报道不多,缺乏系统的研究。为了寻找新的荧光粉基质材料,本文首先合成了(Y_(1-x)Gd_x)_2O_2S:Eu固溶体试样,较系统地研究了它们的基质组成与发射光谱、发光颜色、发光亮度、发光的衰减以及粒度的关系。在此基础上,又讨论了(Y_(0.7)Gd_(0.3))_2O_2S 作为基质时,Eu~(3+)离子浓度对该固溶体发光性能的影响。
In order to find a new phosphorescent host material, the emission spectra, luminescent color and luminescent brightness of (Y, Gd) _2O_2S binary system activated by trivalent europium excited by ultraviolet, cathode and X-ray were investigated. (Y_ (0.7) Gd_ (0.2)) _2O_2S were studied. The effects of the concentration of trivalent europium ions on the luminescent properties of Y_ (0.7) Gd_ (0.2) The results show that adding Gd to Y_2O_2S significantly improves the luminescence intensity under the excitation of cathode and X-ray. Eu ~ (3+) ion-activated rare earth oxysulfides are a class of high-efficiency fluorescent materials. Y_2O_2S: Eu has been used as the red phosphor of color television picture tube in the sixties. In recent years, Eu ~ (3+) -activated Yttria and rare earth oxysulfide solid solutions have also been used in low-voltage display devices. However, there are few reports on the research of Eu ~ (3+) activated rare earth sulfur oxide solid solutions , Lack of systematic research. In order to search for a new phosphor matrix material, the samples of (Y_ (1-x) Gd_x) _2O_2S: Eu were synthesized and their matrix compositions and emission spectra, luminescent color, luminescent brightness and luminescent Attenuation and particle size. On this basis, the effect of Eu 3+ ion concentration on the luminescent properties of the solid solution is also discussed when (Y_ (0.7) Gd_ (0.3)) _ 2O_2S is used as matrix.