Key Words:Eu-doped YVO4; Surfactant-assisted precipitation method; Nanocrystallites; Photoluminescence

Abstract:The olive-like YVO4:Eu nanocrystallites with the equatorial diameters ranging from 50 to 80 nm and the lengths in the range of 100-130 nm have been prepared via cetyltrimethylammonium bromide (CTAB)assisted precipitation method at room temperature in ammonia water media. The olive-like morphologies of nanocrystallites are preserved for the samples calcined at 200 and 400 degrees C, respectively, while the raisin-like nanocrystallites are obtained after the sample was calcined at 600 degrees C. The olive-like or raisin-like YVO4:Eu nanocrystallites upon excitation at 275 nm exhibit the characteristic emission bands of D-5(0)-F-7(J) (J = 1, 2, 3, 4) transitions of Eu3+, with the D-5(0)-F-7(2) transition (split into two peaks at 617 and 621 nm) being the most prominent band. The red-to-orange ratio of Eu3+ for YVO4:Eu nanocrystallites varied with the change in the calcining temperature or the Eu-doped concentration, respectively. Both the calcining temperature and Eu-doped concentration could influence the emission color purity of the YVO4:Eu nanocrystallites. (C) 2009 Elsevier B.V. All rights reserved.

Volume:32

Issue:2

Translation or Not:no