La_2O_2S:Yb,Er的制备及其上转换发光性能  

Preparation of La_2O_2S:Yb,Er and Its Up-conversion Luminescence Property

作　　者：韩朋德[1] 张乐[1] 陈雁[1] 杨浩[1] 王丽熙[1] 张其土[1] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《过程工程学报》2011年第4期701-705,共5页The Chinese Journal of Process Engineering

基　　金：江苏省自然科学基金资助项目(编号:BK2007724);国防科工委军品协作配套科研基金资助项目(编号:JPPT1486)

摘　　要：采用共沉淀法制备了氧化物La2O3:Yb,Er,高温硫熔法煅烧后得到硫氧化物La2O2S:Yb,Er颗粒,采用XRD和SEM对其晶体结构和微观形貌进行表征,利用荧光光谱仪测试其上转换发光性能.结果表明,共沉淀温度40℃、草酸过量5%、草酸浓度2.34%、pH值5.53～6.45、热处理温度800℃时可得理想La2O3:Yb,Er.在1250℃下煅烧3h得到单一均相La2O2S六方晶体,颗粒呈不规则多边形,尺寸约1μm.在980nm激光激发下,样品呈绿色和红色上转换发光.La2O3：Yb,Er powder was prepared using coprecipitation and LaaO2S：Yb,Er obtained by flux fusion method. Its crystalline structure and morphology were characterized by XRD and SEM, respectively, and its up-conversion emission property was tested by fluorescence spectrometer. The results showed when the co-precipitation temperature was 40℃, oxalic acid 5% excess, oxalic acid concentration 2.34%, pH value 5.53-6.45 and calcining temperature of La203 800 ℃, the idealized La203：Yb,Er could be prepared. Moreover, the optimal calcining temperature of La202S was 1250 ℃ for 3 h. The morphology of the particles was irregular. Their average size was about 1 μm. Green and red emission bands were observed when the nowder was excited hv 980 nm laser.

关 键 词：上转换发光 稀土硫氧化物 共沉淀 稀土掺杂 

分 类 号：TQ133.3[化学工程—无机化工]