青岛科技大学  English 
王莉
赞  

副教授 硕士生导师  

教师拼音名称:WL

入职时间:2006-07-14

联系方式:13854288388

职称:副教授

手机版

访问量:

最后更新时间:..

Photoluminescence properties of Y3Al5O12:Eu nanocrystallites prepared by co-precipitation method using a mixed precipitator of NH4HCO3 and NH3&middotH2O

关键字:

摘要:Europium-doped yttrium aluminum garnet (Y3Al5O12:Eu, YAG:Eu) nanocrystallites were prepared by calcining the precursors obtained via a co-precipitation method using a mixed solution of NH4HCO3 and NH3&middotH2O as the precipitator. The results of XRD, FTIR and thermal analysis showed that phase-pure YAG:Eu without any other phases was obtained at 900 °C. TEM results indicated that the particle sizes are 50-100 nm. YAG:Eu nanocrystallites showed four emission bands ascribed to 5D0 &rarr 7F1 transition (592 and 597 nm) and 5D0 &rarr 7F2 transition (611 and 633 nm) of Eu3+, respectively. The intensity of the magnetic dipole transition (5D0 &rarr 7F1) is stronger than that of the electric dipole transition (5D0 &rarr 7F2). The influence of the precipitators with different molar ratios of NH4HCO3 to NH3&middotH2O on the thermal properties of the as-prepared precursors and luminescent properties of the resulting YAG:Eu nanocrystallites was also investigated. © 2009 Elsevier B.V. All rights reserved.

卷号:166

期号:1

是否译文:

崂山校区 - 山东省青岛市松岭路99号   
四方校区 - 山东省青岛市郑州路53号   
中德国际合作区(中德校区) - 山东省青岛市西海岸新区团结路3698号
高密校区 - 山东省高密市杏坛西街1号   
济南校区 - 山东省济南市文化东路80号©2015 青岛科技大学    
管理员邮箱:master@qust.edu.cn