Spray pyrolysis was used to prepare high luminous Y2O3:Eu phosphor particles with spherical shape. In this work, we introduce a simple but effective preparation strategy for enhancing the photoluminescence intensity of Y2O3:Eu particles. The key idea was the solution technique used to densify the porous structure and simultaneously enhance the crystallinity of Y2O3:Eu particles. When the yttrium nitrate solution was modified using the organic additive, the nonhollow particles could be obtained but they were very porous and the luminescence intensity was not improved. To solve this drawback, we used a drying control chemical additive (DCCA) as a secondary additive. It was found that the surface area was greatly reduced and the crystallite size was increased by the use of DCCA. As a result, the densified Y2O3:Eu particles showed great improvement in the photoluminescence intensity. (C) 2005 The Electrochemical Society.