Uniform Ln{sup 3+} (Eu{sup 3+}, Tb{sup 3+}) doped NaLa(WO{sub 4}){sub 2} nanocrystals: Synthesis, characterization, and optical properties

Journal Article · Mon Mar 15 00:00:00 EDT 2010 · Journal of Solid State Chemistry

OSTI ID:21372511

Jun, Gu ^[1]; Haibo, Li; Xianwen, Zhang ^[1]

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1. Department of Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026 (China)

Uniform shuttle-like Ln{sup 3+} (Eu{sup 3+}, Tb{sup 3+}) doped NaLa(WO{sub 4}){sub 2} nanocrystals have been solvothermally synthesized, and the size of the nanocrystals could be easily controlled by adjusting the volume ratio of ethylene glycol (EG) to water. Doped with 5 mol% Eu{sup 3+} and Tb{sup 3+} ions, the NaLa(WO{sub 4}){sub 2} nanocrystals showed strong red and green emissions with lifetimes of 0.8 and 1.40 ms, respectively. A high quenching concentration of 15 mol% was observed in Eu{sup 3+}-doped NaLa(WO{sub 4}){sub 2} nanocrystals and 35 mol% in Tb{sup 3+}-doped NaLa(WO{sub 4}){sub 2} nanocrystals. The emission intensity measurements of Eu{sup 3+}-doped NaLa(WO{sub 4}){sub 2} with different sizes indicated that the emission intensity of shuttles with length of 300 nm in average was stronger than that of shuttles with length of 900 nm in average, but was weaker than that of needles with length of 4 and 9 {mu}m in average. - Graphical abstract: Uniform shuttle-like Ln{sup 3+}(Eu{sup 3+}, Tb{sup 3+}) doped NaLa(WO{sub 4}){sub 2} nanocrystals have been solvothermally synthesized in the mixed solvent of ethylene glycol (EG) and water at 180 deg. C for 16 h.

• OSTI ID: 21372511
• Journal Information: Journal of Solid State Chemistry, Vol. 183, Issue 3; Other Information: DOI: 10.1016/j.jssc.2009.12.019; PII: S0022-4596(09)00589-1; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
DOPED MATERIALS
EUROPIUM COMPOUNDS
EUROPIUM IONS
NANOSTRUCTURES
OPTICAL PROPERTIES
PHOTOLUMINESCENCE
SYNTHESIS
TERBIUM COMPOUNDS
TERBIUM IONS
TUNGSTATES
CHARGED PARTICLES
EMISSION
IONS
LUMINESCENCE
MATERIALS
OXYGEN COMPOUNDS
PHOTON EMISSION
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN COMPOUNDS