Title of article :
Effect of Eu3 + codoping on upconversion luminescence in Y2O3:Er3 +, Yb3 + nanocrystals
Author/Authors :
Sheng، نويسنده , , Y.Q. and Liu، نويسنده , , J. and Xu، نويسنده , , L.L. and Zhai، نويسنده , , D. and Zhang، نويسنده , , Z.G. and Cao، نويسنده , , W.W.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2010
Abstract :
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 S 3 / 2 → 4 F 9 / 2 and 4 I 11 / 2 → 4 I 13 / 2 transitions of Er3+ ions.
Keywords :
A. Rare earth , D. UC luminescence , D. Energy transfer
Journal title :
Solid State Communications
Journal title :
Solid State Communications
