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›› 2011, Vol. 11 ›› Issue (4): 0-0.

• 材料工程专栏 •    下一篇

La2O2S:Yb,Er的制备及其上转换发光性能

韩朋德 张乐 杨浩 王丽熙 张其土   

  1. 南京工业大学材料学院303室 南京工业大学材料学院303室 南京工业大学材料学院303室 南京工业大学材料科学与工程学院 南京工业大学材料学院
  • 收稿日期:2011-04-08 修回日期:2011-05-24 出版日期:2011-08-20 发布日期:2011-08-20
  • 通讯作者: 张其土

Preparation of La2O2S:Yb,Er and Its Up-conversion Luminescence Property

HAN Peng-de ZHANG Le YANG Hao WANG Li-xin ZHANG Qi-tu   

  1. College of Materials Science and Engineering, Nanjing University of Technology College of Materials Science and Engineering, Nanjing University of Technology College of Materials Science and Engineering, Nanjing University of Technology College of Materials Science and Engineering, Nanjing University of Technology College of Material Science and Engineering, Nanjing University of Technology
  • Received:2011-04-08 Revised:2011-05-24 Online:2011-08-20 Published:2011-08-20
  • Contact: ZHANG Qi-tu

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3 h得到单一均相La2O2S六方晶体,颗粒呈不规则多边形,尺寸约1 mm. 在980 nm激光激发下,样品呈绿色和红色上转换发光.

关键词: 上转换发光, 稀土硫氧化物, 共沉淀, 稀土掺杂

Abstract: La2O3:Yb,Er powder was prepared using coprecipitation and La2O2S: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 La2O3 800℃, the idealized La2O3:Yb,Er could be prepared. Moreover, the optimal calcining temperature of La2O2S was 1250℃ for 3 h. The morphology of the particles was irregular. Their average size was about 1 mm. Green and red emission bands were observed when the powder was excited by 980 nm laser.

Key words: up-conversion luminescence, rare-earth oxysulfide, coprecipitation, rare-earth doping

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