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Luminescence properties and upconversion of Er3+ doped and Er3+/Yb3+ co-doped LaF3 particles

Xiao Si-Guo Yang Xiao-Liang Ding Jian-Wen

Luminescence properties and upconversion of Er3+ doped and Er3+/Yb3+ co-doped LaF3 particles

Xiao Si-Guo, Yang Xiao-Liang, Ding Jian-Wen
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Publishing process
  • Received Date:  01 August 2008
  • Accepted Date:  30 October 2008
  • Published Online:  05 March 2009

Luminescence properties and upconversion of Er3+ doped and Er3+/Yb3+ co-doped LaF3 particles

  • 1. 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 4S3/2 and 4F9/2 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.

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