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Up-conversion properties in KGd2F7:Yb3+/Er3+
- Source :
-
Materials Letters . Jul2005, Vol. 59 Issue 17, p2186-2190. 5p. - Publication Year :
- 2005
-
Abstract
- Abstract: Infrared to visible up-conversion emissions in Yb3+–Er3+ co-doped KGd2F7 samples excited at 980 nm are presented in this paper. Green (2H11/2,4S3/2→4I15/2), red (4F9/2→4I15/2) and violet (2H9/2→4I15/2) emissions are observed under low pumping power, and the green emission is dominant. The dependences of these emissions as function of the pumping power intensities and the doped rare-earth ion concentrations are described. The results indicate that the green and red emission of Er3+ ion result from two-photon excitation processes, and the violet emission of Er3+ ion from three-photon processes. The most efficient composition for green emission is 2–4 mol% Er3+ and 10–20 mol% Yb3+ in synthesized samples. The mechanisms for explaining these up-conversion properties have been provided. [Copyright &y& Elsevier]
- Subjects :
- *AIR pollution
*LUMINESCENCE
*PHOTONS
*OPTICAL materials
Subjects
Details
- Language :
- English
- ISSN :
- 0167577X
- Volume :
- 59
- Issue :
- 17
- Database :
- Academic Search Index
- Journal :
- Materials Letters
- Publication Type :
- Academic Journal
- Accession number :
- 17817848
- Full Text :
- https://doi.org/10.1016/j.matlet.2005.02.061