Luminescent properties of dysprosium（Ⅲ） ions in LaAlO3 nanocrystallites

The absorption and emission spectra as well as decay time profile of Dy^3＋ ions in LaAlO3 nanocrystals were analyzed. The crystal structure of LaAlO3 was confirmed from XRD measurement. The emission peaks from blue to red came from main emitting level of dysprosium ^4F9/2 to the ground and other exc...

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Bibliographic Details
Published in中国稀土学报：英文版 Vol. 29; no. 12; pp. 1195 - 1197
Main Author K. Lemafiski P.J. Deren
Format Journal Article
LanguageEnglish
Published 2011
Subjects
LaAlO3
X射线衍射测量
发光特性
发射光谱
纳米晶
纳米离子
铝酸镧
镝
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Summary:The absorption and emission spectra as well as decay time profile of Dy^3＋ ions in LaAlO3 nanocrystals were analyzed. The crystal structure of LaAlO3 was confirmed from XRD measurement. The emission peaks from blue to red came from main emitting level of dysprosium ^4F9/2 to the ground and other excited levels of Dy^3＋ ions. Cross relaxation process led to non-radiative quenching of luminescence, so that the lifetime of the ^4F9/2 energy level ions decreased with increasing amount of doped Dy^3＋ ions. The cross relaxation transfer rates were experimentally determined as a fimction of Dy^3＋ concentration.
Bibliography:The absorption and emission spectra as well as decay time profile of Dy^3＋ ions in LaAlO3 nanocrystals were analyzed. The crystal structure of LaAlO3 was confirmed from XRD measurement. The emission peaks from blue to red came from main emitting level of dysprosium ^4F9/2 to the ground and other excited levels of Dy^3＋ ions. Cross relaxation process led to non-radiative quenching of luminescence, so that the lifetime of the ^4F9/2 energy level ions decreased with increasing amount of doped Dy^3＋ ions. The cross relaxation transfer rates were experimentally determined as a fimction of Dy^3＋ concentration.
11-2788/TF
LaAlO3; dysprosium; luminescence; nanocrystals; cross relaxation; rare earths
ISSN:1002-0721
2509-4963