The influence of Eu3+ on the upconversion (UC) fluorescence of Er3+ in Y 2O3:Er3+, Y b3+ 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% Eu3+ doping. Additionally, with the increase of Eu3+ ion concentration, the n values for both green and red UC emissions in Y 2O3:Er3+, Y b3+ nanocrystals become larger. Our analysis shows that the energy transfer between Eu3+ and Er3+ ions is the main cause for the enhancement of 2H11/2, 4 S3 / 2 → 4 F9 / 2 and 4 I11 / 2 → 4 I13 / 2 transitions of Er3+ ions.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Materials Chemistry