Production of light from sol-gel derived thin films made...

Details Production of light from sol-gel derived thin films made... Production of light from sol-gel derived thin films made...

2006-04-26

2011-11-29

Koslow, Carol M (Department: 1734)

Compositions

Inorganic luminescent compositions

Compositions containing halogen; e.g., halides and oxyhalides

C252S30140R, C252S30140F, C428S690000, C427S162000, C427S226000, C427S240000, C427S372200

Reexamination Certificate

active

08066908

ABSTRACT:
A method of preparing a lanthanide-doped nanoparticle sol-gel matrix film having a high signal to noise ratio is provided. The sol-gels are also provided. A method of preparing light emitting sol-gel films made with lanthanide doped nanoparticles, for the production of white light is also provided. The method comprises selecting lanthanides for the production of at least one of green, red and blue light when excited with near infrared light, preparing nanoparticles comprising the selected lanthanides, stabilizing the nanoparticles with ligands operative to stabilize the nanoparticles in an aqueous solution and selected to be substantially removed from the sol-gel matrix film during synthesis, incorporating the stabilized nanoparticles into a sol-gel matrix and heating to increase the signal to noise ratio of the luminescence by substantially removing the low molecular weight organic molecules. Additionally, light emitting sol-gel films made with lanthanide doped nanoparticles are provided.

REFERENCES:
patent: 6699406 (2004-03-01), Riman et al.
patent: 7094361 (2006-08-01), Riman et al.
patent: 2523027 (2004-11-01), None
patent: WO 2004/085571 (2004-10-01), None
Written Opinion of the International Searching Authority, PCT/CA2006/000681, filed Apr. 26, 2006.
International Search Report, PCT/CA2006/000681, filed Apr. 26, 2006.

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