Luminescence properties and upconversion of Er3+ doped and Er3+ /Yb3+ co-doped LaF3 particles
Xiao Si-Guo, Yang Xiao-Liang, Ding Jian-Wen
湘潭大学材料与光电物理学院，湘潭 411105；湘潭大学纳米物理与稀土发光研究所,湘潭 411105
Abstract Er3+ doped and Er3+ /Yb3+ co-doped superfine LaF3 powders are prepared using co-precipitation method. The sample shows spherical particles with size of about 250 nm. The quantum efficiencies of 4 S 3/2 and 4 F 9/2 levels in the prepared Er3+ doped LaF3 powders are calculated to be 67.0% and 71.9%, respectively. With the enhancement of the Yb3+ doping concentration, The upconvertion intensity increases as a function of excitation power more slowly due to the enhancement of the sensitization of Yb3+ to Er3+ . The Er3+ -Er3+ interaction is also reinforced as the Yb3+ concentration increases. This leads to the increase of the ratio of the green emission to the red one with the enhancement of Yb3+ concentration.
Key words ：
Er3+
Yb3+
luminescence
energy transfer
Received: 2008-08-01
Published: 2009-06-20
Cite this article:
Xiao Si-Guo,Yang Xiao-Liang,Ding Jian-Wen. Luminescence properties and upconversion of Er3+ doped and Er3+ /Yb3+ co-doped LaF3 particles. Acta Phys. Sin., 2009, 58(6): 3812-3820.
URL:
http://wulixb.iphy.ac.cn/CN/Y2009/V58/I6/3812
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2009, Vol. 58 
