Optical Properties of Y₂O₃:Eu³⁺Red Emitting Phosphor Obtained via Spray Pyrolysis

Abstract

In the present work we explored the possibility of obtaining Y 2 O 3 :Eu 3+ m-size particles by an ultrasonic spray pyrolysis method. As-prepared sample constitutes of spherical, hollow particles with an average size of 1 to 2 m. Pure, well crystalline, cubic Y 2 O 3 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 5 D 0 emission are evaluated on the basis of Judd-Ofelt theory.