Electroluminescent materials for edge emitters

Details Electroluminescent materials for edge emitters Electroluminescent materials for edge emitters

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

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