Organic electroluminescent device
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United States of America Patent
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Issued Date -
Nov 30, 2006
app pub date -
Sep 15, 2004
filing date -
Sep 25, 2003
priority date (Note) -
Abandoned
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Abstract
This invention provides an organic electroluminescent element (hereinafter referred to as an organic EL element) utilizing phosphorescence which shows improved luminous efficiency and assured driving stability and has a simple structure. The organic EL element comprises an anode, organic layers containing a hole-transporting layer, a lightemitting layer and an electron-transporting layer and a cathode piled one upon another on a substrate with the hole-transporting layer disposed between the light-emitting layer and the anode and the electron-transporting layer disposed between the light-emitting layer and the cathode. The light-emitting layer contains a pyridyl phenoxy zinc complex represented by the following general formula (I) as a host material and an organic metal complex containing at least one metal selected from Ru, Rh, Pd, Ag, Re, Os, Ir, Pt and Au as a guest material. In formula (I), R.sub.1--R.sub.8 denote hydrogen and groups such as alkyl, alkenyl, cyano, amino, amide, alkoxycarbonyl, carboxyl, alkoxy and aryl.
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