Electroluminescent alkaline-earth sulfide phosphor thin films wi

Details Electroluminescent alkaline-earth sulfide phosphor thin films wi Electroluminescent alkaline-earth sulfide phosphor thin films wi

1998-09-14

2000-06-06

Jackson, Jr., Jerome

Active solid-state devices (e.g., transistors, solid-state diode

Incoherent light emitter structure

With particular semiconductor material

257 79, 257 76, 257102, 257613, 257614, 313483, 313498, 313502, 313503, 313509, H01L 3300

Patent

active

060721987

ABSTRACT:
A light emitting phosphor having improved luminance is incorporated into an ACTFEL device having front and rear electrode sets, a pair of insulators sandwiched between the front and rear electrode sets, and a thin film electroluminescent laminar stack which includes a phosphor layer having the formula M.sup.II S:D,H where M.sup.II is taken from the group calcium, strontium, barium, and magnesium, S=sulfur, D is taken from the group copper, lead, gold, silver, magnesium, antimony, bismuth and arsenic, and H is taken from the group fluorine, chlorine, bromine, and iodine. Deep blue and green chromaticity phosphors may be obtained through selection of multiple co-dopants and adjusting their relative concentrations.

REFERENCES:
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Article entitled New Electroluminescent Phosphors Based on Strontium Sulfide (1985 International Display Research Conference); pp. 163-166.
Electroluminescent Displays by Yoshimasa A. Ono (10 pages) (at least 1993).
Article entitled New Deposition Process for Very Blue and Bright SrS:Ce, CI TFEL Devices; by Heinrich-Hertz Institute, Berlin, Germany; published by SID Digest 1997, 4 pages (pp. 411-414).
Article entitled DC Electroluminescence in Alkaline Earth Sulphides; North-Holland Publishing Company; (1981) 4 pages (pp. 917-920).
Article entitled Alkaline Earth Sulfide Phosphors Activated by Copper, Silver, and Gold by Willi Lehmann; published by Westinghouse Research Laboratories (1970); 6 pages.

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