Organic element for electroluminescent devices

Details Organic element for electroluminescent devices Organic element for electroluminescent devices

2006-08-15

2006-08-15

Garrett, Dawn (Department: 1774)

Stock material or miscellaneous articles

Composite

Of inorganic material

C428S917000, C313S504000, C313S506000, C313S112000, C427S066000, C257S098000

Reexamination Certificate

active

07090930

ABSTRACT:
Disclosed is a useful electroluminescent device comprising a cathode, an anode, and therebetween a light emitting layer containing a host material and a phosphorescent light-emitting material wherein the host material is represented by formula (1):in-line-formulae description="In-line Formulae" end="lead"?X′-A-X″  (1)in-line-formulae description="In-line Formulae" end="tail"?wherein:A is selected from the group consisting of an unsubstituted phenylene ring, a biphenylene group, a terphenylene group, a naphthylene group, and a fluorene group; andeach of X′ and X″ is an independently selected aromatic group bearing an ortho aromatic substituent.

REFERENCES:
patent: 2002/0024293 (2002-02-01), Igarashi et al.
patent: 2002/0093006 (2002-07-01), Vardeny et al.
patent: 2003/0039858 (2003-02-01), Igarashi et al.
patent: 1 289 015 (2003-03-01), None
patent: 1 339 264 (2003-08-01), None
patent: WO 03/007658 (2003-01-01), None

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