A method for preparing rare earth-doped tungsten oxide nanostructure film

Abstract

The invention relates to a preparation method of a rare earth-doped tungsten oxide nanostructure film. The process step is to use a mixture of W powder and rare earth oxide as a raw material, and first use a traditional thermal evaporation method on quartz, silicon wafers, ceramics, etc. A thin film is grown on the substrate, and then annealed to obtain a rare earth-doped tungsten oxide nano film. The rare earth-doped tungsten oxide nanostructure material is evenly distributed, the Raman spectrum shows the characteristic peaks of tungsten oxide, has high crystallinity, is excited by short-wavelength light, and the emission spectrum shows the characteristic peaks of rare earth ions. Since the crystal structure of tungsten oxide is rich, reversible, and variable, and the energy level splitting is different when the rare earth ions are in different lattice fields, the change of the crystal field can be distinguished according to the characteristics of the emission spectrum, so as to achieve the effect of rare earth ions on the lattice field. It has great potential application value in the field of luminescence, semiconductor field and as a fluorescent probe.

Description

technical field [0001] The invention relates to a preparation method of a rare earth-doped tungsten oxide nanostructure film. Background technique [0002] Rare earth trivalent ions have abundant 4f energy level configurations, and their fluorescence characteristics are greatly affected by the crystal field environment and the symmetry of the lattice. At present, many scholars use semiconductor nanomaterials (ZnO, TiO 2 ) small size effect and lattice sensitization to improve the optical properties of rare earth trivalent ions, which are widely used in bioluminescent probes, optical devices and new luminescent materials. [0003] There have been a large number of literature reports on the synthesis and research of titanium dioxide and zinc oxide doped rare earths in semiconductor compounds, and the crystal structure of tungsten oxide is perovskite-like BCO 3 transition metal oxides are rarely studied. Unlike other semiconductor materials, the crystal structure of tungsten...

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Problems solved by technology

On the other hand, the high temperature makes the W atoms slightly shift in the center of the regular octahedron, and the basic ions (Li + 、Na + 、H + ) into the lattice to occupy the position of B (the process is reversible), it is easy to induce changes in the material structure and electronic band structure, resulting in changes in the optical properties of the material

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