Effect of Eu 3 + codoping on upconversion luminescence in Y 2O 3:Er 3 +, Yb 3 + nanocrystals
Abstract
The influence of Eu 3+ on the upconversion (UC) fluorescence of Er 3+ in Y 2O 3:Er 3+, Y b 3+ nanocrystals was investigated. Room-temperature UC spectra show that the intensity ratio of red to green lights was increased from 8.6 to 19.3 with 1.0 mol% Eu 3+ doping. Additionally, with the increase of Eu 3+ ion concentration, the n values for both green and red UC emissions in Y 2O 3:Er 3+, Y b 3+ nanocrystals become larger. Our analysis shows that the energy transfer between Eu 3+ and Er 3+ ions is the main cause for the enhancement of 2H 11/2, 4S→4F and 4I→4I transitions of Er 3+ ions.
- Publication:
-
Solid State Communications
- Pub Date:
- June 2010
- DOI:
- 10.1016/j.ssc.2010.03.004
- Bibcode:
- 2010SSCom.150.1048S
