Optical properties of Y2O3:Eu3+ red emitting phosphor obtained via spray pyrolysis

Abstract

In the present work we explored the possibility of obtaining Y 2O3:Eu3+ μm-size particles by an ultrasonic spray pyrolysis method. As-prepared sample constitutes of spherical, hollow particles with an average size of 1 to 2 μm. Pure, well crystalline, cubic Y2O3 is formed after additional thermal treatment at 800 °C for 2 h. A detailed optical investigation has been done with photoluminescence measurements in the energy and time domains. Experimental intensity parameters, transition rates and quantum efficiency of the 5D0 emission are evaluated on the basis of Judd-Ofelt theory.