Synthesis and luminescence properties of colloidal YVO{sub 4}:Eu phosphors
Concentrated colloidal solutions of well-dispersed YVO{sub 4}:Eu nanoparticles are synthesized by precipitation reactions at room temperature and stabilized by sodium hexametaphosphate. X-ray diffraction and electron microscopy characterizations show that the crystalline nanoparticles exhibit an ellipsoidal form with two characteristic dimensions of around 15 and 30 nm. In comparison with the bulk, a lower luminescence efficiency as well as a higher concentration quenching are observed. These deviations are explained as the variations of some characteristics of the colloidal samples, such as the crystallinity and the surface chemistry. When these parameters are optimized, the quantum yield of the luminescence reaches 38% for the nanoparticles containing a europium concentration of 15%.
- Research Organization:
- Ecole Polytechnique, Palaiseau (FR)
- OSTI ID:
- 20075558
- Journal Information:
- Chemistry of Materials, Vol. 12, Issue 4; Other Information: PBD: Apr 2000; ISSN 0897-4756
- Country of Publication:
- United States
- Language:
- English
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