Morphology and Luminescence of(GdY)2O3:Eu Particles Prepared by Colloidal Seed-Assisted Spray Pyrolysis

✍ Scribed by Hyun Sook Roh; Yun Chan Kang; Seung Bin Park

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 344 KB
• Volume: 228
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.2000.6947

✦ Synopsis

Gd x Y 1-x ) 2 O 3 :Eu [x = 0, 0.25, 0.5, 0.75, 1.0] phosphor particles with 6 at.% Eu dopant of total concentration were prepared using spray pyrolysis. The effects of composition on the morphology, crystallinity, and photoluminescence characteristics of composite particles were investigated. The morphological control of (Gd x Y 1-x ) 2 O 3 :Eu particles in spray pyrolysis was also attempted by using colloidal and aqueous solutions. The particles prepared from colloidal solutions containing small amounts of Gd or Y hydroxy carbonate sol as seed material had spherical and filled morphology after the post-treatment at high temperature. On the other hand, the (Gd x Y 1-x ) 2 O 3 :Eu particles prepared from aqueous solutions were hollow and porous after post-treatment in all compositions. Particles prepared from colloidal solutions had photoluminescence emission intensities higher than those of particles prepared from aqueous solutions.