Polymer complex solution synthesis of (YxGd1−x)2O3:Eu3+ nanopowders

✍ Scribed by Ž. Andrić; M.D. Dramićanin; M. Mitrić; V. Jokanović; A. Bessière; B. Viana

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 331 KB
• Volume: 30
• Category: Article
• ISSN: 0925-3467
• DOI: 10.1016/j.optmat.2007.05.006

✦ Synopsis

Yttrium-gadolinium-europium oxide phosphors are regarded promising for many important optical applications, for example in computed tomography medical imaging and plasma displays. In this work, we investigated procedure for (Y x Gd 1Àx ) 2 O 3 :Eu 3+ (x = 0, 0.25, 0.5, 0.75 and 1) nanopowder synthesis using polymer complex solution method (PCS) based on polyethylene glycol fuel (PEG). Structural and emission properties of nanopowders are investigated by X-ray diffraction, electron microscopy and photoluminescence measurements. We obtained particles of about 40 nm having excellent structural ordering in cubic bixbyte type of structure -space group Ia3 for all mixed oxide compositions. Luminescence emission measurements exposed characteristic transition of the trivalent europium ion incorporated into insulating host. 5 D 1 and 5 D 0 decay time values are measured to obtain information on different kinetic processes occurring for these two emitting levels.