Organic electroluminescent device

Details Organic electroluminescent device Organic electroluminescent device

2004-11-25

2010-10-19

Tarazano, D. Lawrence (Department: 1786)

Stock material or miscellaneous articles

Composite

Of inorganic material

C313S504000, C544S132000

Reexamination Certificate

active

07816020

ABSTRACT:
Provided is an organic electroluminescent device which is suitable for use in full-color and multicolor panels and shows higher luminous efficiency and better driving stability than organic electroluminescent devices utilizing luminescence from the singlet state. The organic electroluminescent device comprises a substrate1and an anode2, organic layers, and a cathode8piled one upon another on the substrate, at least one of the organic layers comprises a light-emitting layer5containing a host material and a dopant material, and a compound having 2 to 4 pyrazole structures represented by the following formula I (wherein Ar4to Ar6are independently hydrogen or substituted or unsubstituted aromatic hydrocarbon groups or aromatic heterocyclic groups) is used as said host material.

REFERENCES:
patent: 2001-230079 (2001-08-01), None
patent: 2002-352957 (2002-12-01), None
patent: 2003-109765 (2003-04-01), None
patent: 2004-146368 (2004-05-01), None
patent: 2004-146368 (2004-05-01), None
patent: 2004-331588 (2004-11-01), None
English Translation of JP 2004-146368.
Connell et. al., Polypyrazole . . . 1987, J. Of Polymer Science Part A, vol. 25, pp. 2531-2542.

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