Electroluminescent device

Details Electroluminescent device Electroluminescent device

1989-11-29

1992-02-11

Seidleck, James J.

Stock material or miscellaneous articles

Composite

Of inorganic material

313506, 313507, 313509, 428917, B32B 1800, H01J 162

Patent

active

050875310

ABSTRACT:
Disclosed is an electroluminescent device including a substrate and an electroluminescent film on the substrate wherein the electroluminescent film is composed of a II-VI group compound semiconductor matrix and an electroluminescent center element; the improvement being present in that the electroluminescent film has a crystal structure of a hexagonal system, and contains the electroluminescent center element in a concentration (Ci) of 0.5 to 4 at. % within a thickness of 0.2 micrometer from the side of the substrate and in a concentration (Cr) of 0.15 to 0.7 at. % at the residual portion, and Ci is larger than Cr, and the process for preparing the same.

REFERENCES:
patent: 4907043 (1990-03-01), Uekita et al.

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