Thin film electroluminescent device

Details Thin film electroluminescent device Thin film electroluminescent device

1986-11-18

1988-02-23

Swisher, Nancy A. B.

Stock material or miscellaneous articles

Composite

Of inorganic material

428691, 313503, B32B 1604

Patent

active

047270047

ABSTRACT:
A thin film EL device having a double-insulated structure and comprising an emitting layer made of an alkaline-earth sulfide as its host material and doped with Eu.sup.2+ for providing luminescent centers. The emitting layer has a Eu concentration of 0.15 to 0.75 atm. % and a controlled thickness of at least 1.3 .mu.m to impart hysteresis to the brightness vs. applied voltage characteristics of the device.

REFERENCES:
patent: 4264677 (1981-04-01), Koyama et al.
patent: 4365184 (1982-12-01), Higton et al.
patent: 4547703 (1985-10-01), Fujita et al.
S. Tanaka et al., "Multi-Color Electroluminescence in Alkaline-Earth-Sulfide Thin-Film Devices," Sid 85 Digest, p. 218, May 1985.

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