Optical properties of nanocrystalline Y2O3:Eu3+

Optical properties of nanocrystalline red-emitting phosphor, Europium dopedYttria (Y$_{2}$O$_{3}$:Eu$^{3+})$, of average particle size 15 nm areinvestigated. The intensity of the strongest emission line at 612 nm is foundto be highest in the nanocrystalline sample with 4 at. wt. % of Europium. Thenarrow electronic emission spectrum suggests a crystalline surrounding in thisnanomaterial. We have estimated the strength of the crystal field parameter atthe dopant site, which plays a crucial role in determining the appearance ofthe intense emission line. The equilibrium temperature of this system has alsobeen calculated from the intensity ratio of Stokes and anti-Stokes Ramanscattering. Though known for the bulk samples, our approach and consequentresults on the crystalline nanomaterial of Y$_{2}$O$_{3}$:Eu$^{3+}$ provide aunique report, which, we believe, can be of considerable significance innanotechnology.the intensity ratio of Stokes and anti-Stokes Raman scattering.Though known for the bulk samples, our approach and consequent results on thecrystalline, defect/disorder free nanomaterial of Y2O3:Eu3+ provides a uniquereport which, we believe, can be of considerable significance innanotechnology.Comment: 16 pages, 8 figure