Method of making electroluminescent phosphor films

Details Method of making electroluminescent phosphor films Method of making electroluminescent phosphor films

1986-06-20

1988-02-16

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

Coating, forming or etching by sputtering

2523014S, 427 64, 427 66, 4273761, C09K 1108

Patent

active

047253444

ABSTRACT:
An electroluminescent film of an activated alkaline earth metal sulfide phosphor is produced by a method utilizing low temperatures for substrate protection and achieving excellent crystallinity and enhanced brightness. A layer of an alkaline earth metal halide and a suitable activatior is deposited on the substrate, heated to melt the halide and treated with gaseous hydrogen sulfide to form the phosphor. A precursor for the halide may be deposited on the substrate heated to melting temperature and treated with gaseous hydrogen halide to form the halide in-situ.

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