Stock material or miscellaneous articles – Composite – Of inorganic material
Reexamination Certificate
2011-08-09
2011-08-09
Garrett, Dawn L. (Department: 1786)
Stock material or miscellaneous articles
Composite
Of inorganic material
C428S917000, C313S504000, C548S418000
Reexamination Certificate
active
07993760
ABSTRACT:
Disclosed are an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secured of driving stability, and simple in constitution and a compound for use therein. The organic electroluminescent device comprises a light-emitting layer disposed between an anode and a cathode piled one upon another on a substrate and the light-emitting layer contains a phosphorescent dopant and a compound for use in an organic electroluminescent device having two or more indolocarbazole skeletons as a host material. An example of the compound having indolocarbazole skeletons for use in the device is expressed by the following formula.
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Hotta Masanori
Kai Takahiro
Komori Masaki
Yamamoto Toshihiro
Birch & Stewart Kolasch & Birch, LLP
Bohaty Andrew K
Garrett Dawn L.
Nippon Steel Chemical Co. Ltd.
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