Device for converting invisible and visible radiation to visible

Details Device for converting invisible and visible radiation to visible Device for converting invisible and visible radiation to visible

1996-01-16

1998-07-28

Speer, Timothy M.

Stock material or miscellaneous articles

Composite

Of inorganic material

428690, 428691, 428696, 428697, 428432, 427585, B32B 900

Patent

active

057861021

ABSTRACT:
An amorphous upconversion phosphor comprising barium fluoride a combination of rare-earth fluorides including yttrium and lanthanum and dopants, and a waveguide thereof on a substrate selected to have a refractive index lower than a thin film of the phosphor material or any other substrate with an appropriate buffer layer of lower refractive index that the film wherein infrared radiation and visible light are converted to ultraviolet and visible light. The amorphous upconversion phosphor is deposited at temperatures low enough to permit integration into semiconductor materials.

REFERENCES:
patent: 4180478 (1979-12-01), Omi
patent: 5003179 (1991-03-01), Pollack
patent: 5006906 (1991-04-01), Deri
patent: 5051278 (1991-09-01), Paz-Pujalt
patent: 5295218 (1994-03-01), Agostinelli
patent: 5313547 (1994-05-01), Lambard
F. Auzel, D. Pecile, Journal of Luminescence, 8, 32-43, 1973.

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