Optical properties of nanocrystalline red-emitting phosphor, Europium doped Yttria (Y2O3:Eu3+), of average particle size 15 nm are investigated. The intensity of the strongest emission line at 612 nm is found to be highest in the nanocrystalline sample with 4 at. wt. % of Europium. The narrow electronic emission spectrum suggests a crystalline surrounding in this nanomaterial. We have estimated the strength of the crystal field parameter at the dopant site, which plays a crucial role in determining the appearance of the intense emission line. The equilibrium temperature of this system has also been calculated from the intensity ratio of Stokes and anti-Stokes Raman scattering. Though known for the bulk samples, our approach and consequent results on the crystalline nanomaterial of Y2O3:Eu3+ provide a unique report, which, we believe, can be of considerable significance in nanotechnology.the intensity ratio of Stokes and anti-Stokes Raman scattering. Though known for the bulk samples, our approach and consequent results on the crystalline, defect/disorder free nanomaterial of Y2O3:Eu3+ provides a unique report which, we believe, can be of considerable significance in nanotechnology.
@article{arxiv.cond-mat/0407519,
title = {Optical Properties of Nanocrystalline Y2O3:Eu3+},
author = {S. Ray and A. Singha and P. Pramanik and Anushree Roy},
journal= {arXiv preprint arXiv:cond-mat/0407519},
year = {2009}
}