Stock material or miscellaneous articles – Composite – Of inorganic material
Patent
1995-12-13
1997-12-23
Nold, Charles
Stock material or miscellaneous articles
Composite
Of inorganic material
428691, 428917, 313503, 313507, H05B 3300
Patent
active
057005923
ABSTRACT:
An electroluminescent edge emitting device having an improved operational life and electroluminescent efficiency includes a host material composed of at least two Group II elements and at least one element selected from Group VIA. The host material is doped with at least one of the rare earth elements in its 3+ or 2+ oxidation state. In one embodiment of the invention, two Group IIB elements are selected, namely cadmium and zinc. In an alternate embodiment, three Group IIA elements, magnesium, calcium and strontium, are selected as the host material. The Group VIA element is sulfide and/or selenide. The dopant is composed of one, two or three elements selected from the rare earth elements (lanthanides). In an alternate embodiment, the dopants include Mn.sup.2+ and one or two of the lanthanides.
REFERENCES:
patent: 5299217 (1994-03-01), Migita et al.
patent: 5311035 (1994-05-01), Nire
Mueller Gerd O.
Mueller-Mach Regina B.
Hewlett-Pacard Company
Nold Charles
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