Affiliation of Author(s):

机电工程学院

Journal:

Solid State Sciences

Key Words:

中文关键字：发光，英文关键字：Optical material

Abstract:

Rhombus-, rod-, soya bean- and aggregated soya bean-like YVO4:Eu3þ micro- and nanostructures were synthesized by a cetyltrimethylammonium bromide (CTAB)-assisted hydrothermal method at 180 C for 24 h in a wide pH range. The as-synthesized powders were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and photoluminescence spectroscopy (PL). The XRD results confirmed the formation of phase-pure YVO4:Eu3þ powders with tetragonal structure under hydrothermal process in a wide pH range. Electron microscopic observations evidenced the morphological transformation of YVO4:Eu3þ powders from rhombus-like microstructure to rod-, soya bean, and aggregated soya bean-like nanostructures with an increase in the pH of the synthesis solution. The results from the PL measurements revealed that the intensities of PL emission peaks were significantly affected by the morphologies and crystallinity of samples due to the absence of an inversion symmetry at the Eu3þ lattice site, and the highest luminescence intensity was observed for rod-like YVO4:Eu3þ powders.

Note:

王娟

First Author:

wangjuan

Indexed by:

Journal paper

Volume:

卷：14

Issue:

期：

Page Number:

页：191e196

Translation or Not:

no

Date of Publication:

2012-12-01