Spectroscopy characteristics of vanadate Ca9Dy(VO4)7 for application of white-light-emitting diodes
Creators
- 1. College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123 (China)
- 2. Department of Physics, Pukyong National University, Busan 608-737 (Korea, Republic of)
Description
A vanadate, Ca9Dy(VO4)7, was synthesized by the general high temperature solid-state reaction in air atmosphere. X-ray powder diffraction analysis confirmed the formation of single phase Ca9Dy(VO4)7. Photoluminescence excitation spectrum showed that the phosphor could be efficiently excited by UV-visible light from 250 to 500 nm. The characteristic emission peaks of Dy3+ were observed in the emission spectra due to the transitions of 4F9/2 → 6H15/2 at 483 nm and 4F9/2 → 6H13/2 at 573 nm. The photoluminescence measurements showed that the Ca9Dy(VO4)7 exhibited an improved chromaticity compared with YVO4:Dy3+. This was ascribed to lower site symmetry and disordered cation sites in Ca9Dy(VO4)7. The luminescence characteristics of Ca9Dy(VO4) indicated that this phosphor has a possible application for white-light-emitting diode. Luminescence mechanism and site occupancies of Dy3+ ions in Ca9Dy(VO4)7 lattices were discussed.
Availability note (English)
Available from http://dx.doi.org/10.1016/j.matchemphys.2009.04.002Additional details
Identifiers
- DOI
- 10.1016/j.matchemphys.2009.04.002;
- PII
- S0254-0584(09)00214-4;
Publishing Information
- Journal Title
- Materials Chemistry and Physics
- Journal Volume
- 116
- Journal Issue
- 2-3
- Journal Page Range
- p. 449-452
- ISSN
- 0254-0584
- CODEN
- MCHPDR
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 43069554
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- CADMIUM COMPOUNDS; DYSPROSIUM COMPOUNDS; DYSPROSIUM IONS; EMISSION SPECTRA; LIGHT EMITTING DIODES; OPTICAL PROPERTIES; PHOTOLUMINESCENCE; SPECTROSCOPY; SYNTHESIS; ULTRAVIOLET RADIATION; VANADATES; VISIBLE RADIATION; X-RAY DIFFRACTION
- Descriptors DEC
- CHARGED PARTICLES; COHERENT SCATTERING; DIFFRACTION; ELECTROMAGNETIC RADIATION; EMISSION; IONS; LUMINESCENCE; OXYGEN COMPOUNDS; PHOTON EMISSION; PHYSICAL PROPERTIES; RADIATIONS; RARE EARTH COMPOUNDS; SCATTERING; SEMICONDUCTOR DEVICES; SEMICONDUCTOR DIODES; SPECTRA; TRANSITION ELEMENT COMPOUNDS; VANADIUM COMPOUNDS
Optional Information
- Copyright
- Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.