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- Title
(SrCa)WO and (SrCa)WO:Eu nanoparticles: synthesis and luminescence.
- Authors
Zhang, Xiao-Juan
- Abstract
(SrCa)WO and (SrCa)WO:0.05Eu nanoparticles were synthesized by precipitation without using any complexing agent. The XRD patterns show that the obtained samples present a scheelite-type tetragonal structure without deleterious phase, and the increase of Ca concentration decreases the cell volume of materials. The TGA/DTA curve shows that the materials began to crystallize at temperature of 650 °C. The excitation and emission spectra of (SrCa)WO samples show bands originating from the charge transfers within WO groups. All (SrCa)WO samples show broad blue emission at room temperature. The excitation and emission spectra of (SrCa)WO:0.05Eu samples show bands originating from the charge transfers of Eu ions. All (SrCa)WO:0.05Eu samples show prominent red emission at room temperature. The substitutions of Ca ions to Sr ions have obvious influence on luminescence properties. The intensity and quantum efficiency increase with the substituted Ca concentrations.
- Subjects
TUNGSTATES; PRECIPITATION (Chemistry); RARE earth ions; NANOPARTICLE synthesis; NANOPARTICLES; OPTICAL properties; QUANTUM chemistry; QUANTUM efficiency
- Publication
Journal of Materials Science: Materials in Electronics, 2014, Vol 25, Issue 12, p5496
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-014-2334-z