Photoluminescent materials for outputting reddish-orange light a

Details Photoluminescent materials for outputting reddish-orange light a Photoluminescent materials for outputting reddish-orange light a

1988-01-22

1989-11-07

Morgenstern, Norman

Stock material or miscellaneous articles

Composite

Of inorganic material

428690, 427 64, 427 71, 2523014S, 2523014H, 2503272, B32B 900, B05D 506, C09K 1108, G03G 516

Patent

active

048791865

ABSTRACT:
Photoluminescent materials useful for detection of infrared light are prepared using a base material, first and second dopants and a fusible salt. The base material is an alkaline earth metal sulfide such as calcium sulfide. Lithium fluoride is used to enhance the interdiffusion of materials. Samarium and a europium compound are used as the first and second dopants for providing electron traps. The photoluminescent material is made according to a process involving heating of the material to a fusing temperature, grinding the material after cooling, and reheating the material to below the fusing temperature, but sufficiently high to repair the crystal surfaces. The material is then placed in a transparent binder and applied to a substrate, or deposited as a thin film directly on a substrate for different uses.

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