摘要
本文首次报道由尿素溶胶法制备的球形、超细（１２０～２５０ｎｍ）高效Ｙ２Ｏ３∶Ｅｕ红色荧光粉的晶体结构及其阴极射线发光和光致发光性质．这种超细颗粒在２５４ｎｍ激发时的发光强度比商用的传统微米样品低．但在中等电压（≤１０ｋＶ）的电子束激发下，其阴极射线发光强度超过商用微米样品．这种接近纳米的Ｙ２Ｏ３∶Ｅｕ超细颗粒已表现出较强的表面效应．对实验结果进行了分析和讨论．
This paper reports the crystal structure, characteristics of cathodoluminescence and photoluminescence of the Y2O3: Eu phosphor with the spherical and superfine particles(120-250 nm)produced by urea-sol process for the first time.The relative intensity of this kind of superfine Y2O3: Eu phosphor under 254 nm excitation is lower than that of the commercial sample with micrometer size of 6 μm. But under the excitation of the electron beam with the middle accelerating voltage(～≤10kV) the cathodoluminescent intensties of the superfine Y2O3: Eu particles are higher than that of the commercial Y2O3: Eu phosphor. The experimental results are discussed. It is considered that the back scattering for UV photons and electrons and the surface effect in the superfine Y2O3: Eu particles in which the specific surface area(cm2/g) is larger and the surface atoms are in a higher energy state than the interior atoms are important.
出处
《发光学报》
EI
CAS
CSCD
北大核心
1996年第1期52-55,共4页
Chinese Journal of Luminescence
基金
国家自然科学基金
中国科学院长春物理研究所激发态物理开放研究室资助
关键词
超细颗粒
荧光粉
光致发光
luminescence, superfine particle, Y_2O_3∶Eu, phosphor
