Molten Salt Synthesis and Luminescent Properties of YVO₄:Ln (Ln = Eu³⁺, Dy³⁺) Nanophosphors

Authors: Liu, Chenglu; Wang, Fang; Jia, Peiyun; Lin, Jun; Zhou, Zhiqiang

Source: Journal of Nanoscience and Nanotechnology, Volume 12, Number 1, January 2012 , pp. 151-158(8)

Publisher: American Scientific Publishers

Buy & download fulltext article:

Price: $113.00 plus tax (Refund Policy)

Abstract:

Eu³⁺ and Dy³⁺-doped YVO₄ nanocrystallites were successfully prepared at 400 °C in equal moles of NaNO₃ and KNO₃ molten salts. X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, transmission electronic microscopy (TEM), photoluminescence (PL) spectrum and lifetime were used to characterize the nanocrystallites. XRD results demonstrate that NaOH concentration and annealing temperature play important roles in phase purity and crystallinity of the nanocrystallites, the optimum NaOH concentration and annealing temperature being 6:40 and 400 °C respectively. TEM micrographs show the nanocrystallites are well crystallized with a cubic morphology in an average grain size of about 18 nm. Upon excitation of the vanadate group at 314 nm, YVO₄:Eu³⁺ and YVO₄:Dy³⁺ nanocrystallites exhibit the characteristic emission of Eu³⁺ and Dy³⁺, which indicates that there is an energy transfer from the vanadate group to the rare earth ions. Moreover, the structure and luminescent properties of the nanocrystallites were compared with their bulk counter-parts with same composition in detail.

Keywords: YVO4; MOLTEN SALT; NANOCRYSTALLITE; LUMINESCENCE

Document Type: Research article

DOI: http://dx.doi.org/10.1166/jnn.2012.5116

Publication date: 2012-01-01

More about this publication?

Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
Editorial Board
Information for Authors
Subscribe to this Title
Terms & Conditions
ingentaconnect is not responsible for the content or availability of external websites