Organic Electroluminescent Device
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United States of America Patent
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Issued Date -
Dec 3, 2009
app pub date -
Nov 27, 2006
filing date -
Dec 1, 2005
priority date (Note) -
Abandoned
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Abstract
Disclosed is an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully assured of driving stability, and simple in constitution. The organic electroluminescent device comprises a hole-transporting layer, a light-emitting layer, and an electron-transporting 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 an indolocarbazole compound of specific structure. Examples of the indolocarbazole compound are N,N′-diphenylindolocarbazole and bis(N-phenylindolo)carbazole.
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