微乳液法制备(Y,Gd)2O3：Eu^3＋纳米粒子及光谱特性  

Preparation and optical spectrum characterisitics of (Y,Gd)_2O_3:Eu^(3+) nanoparticles by microemulsion

作　　者：沈世妃[1,2] 马伟民[1] 闻雷[3] 郭易芬[2] 刘晶[1] 

机构地区：[1]沈阳化工学院材料科学与工程学院,沈阳110142 [2]沈阳大学材料科学与工程系,沈阳110044 [3]中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳110016

出　　处：《中国有色金属学报》2008年第10期1931-1936,共6页The Chinese Journal of Nonferrous Metals

基　　金：辽宁省自然科学基金资助项目(20062001);辽宁省科技攻关计划资助项目(2005222009)

摘　　要：采用反相微乳液法制备(Y,Gd)2O3:Eu3+纳米粉体。通过XRD、TG/DSC、SEM、TEM、PL等手段分别对样品的晶化过程、晶粒尺寸、粉体形貌以及发光性能进行分析。结果表明:晶粒尺寸随着晶化温度提高而增加,样品在800℃晶化完全。当乳液浓度为0.37mol/L时所得粉体颗粒呈近似球形,一次粒径尺寸约20nm。样品在612nm监控光下得到的激发光谱是宽带谱,对应着Eu3+-O2-的电荷迁移带跃迁。发射光谱的特征峰位于612nm处,是由于Eu3+离子的5D0-7F2跃迁造成的。当Eu的原子分数大于10%时发生浓度猝灭,导致特征峰强度降低。（Y, Gd）2O3：Eu^3＋ nanoparticles were prepared by reverse microemulsion method. The crystallization process, grain size, morphology and photoluminescence properties of the sample were characterized by XRD, TG/DSC, SEM, TEM and PL. The results show that the grain size increases with increasing crystallization temperature and the complete crystallization temperature of the precursor is 800 ℃. The particles are near-spherical with the primary size of 20 nm when the initiate concentration is 0.37 mol/L. The excitation spectra of （Y, Gd）2O3：Eu^3＋ is observed by monitoring at 612 nm, and there is a wide band which is due to the charge transfer band （CTB） of Eu^3＋-O^2-. The characteristic peak of （Y, Gd）2O3：Eu^3＋ locates at 612 nm which is caused by ^5D0-^7F2 transition of Eu^3＋ excited by 237 nm. When the atomic content of Eu is above 10%, the concentration quenching occurs and it leads to the intensity decreasing of the characteristic peak.

关 键 词：反相微乳液 (Y Gd)2O3:Eu3+纳米粒子 发光性能 浓度猝灭 

分 类 号：O614.33[理学—无机化学] TQ422[理学—化学]