| 摘要 |
PROBLEM TO BE SOLVED: To improve a luminescence efficiency of an organic electroluminescenct element utilizing phosphorescence luminescence and to secure a driving stability of the same. SOLUTION: In an organic electroluminescenct element having an anode, a luminous layer, and cathode laminated on a substrate in order, the luminous layer contains a compound having N-phenylcarbazole skeleton as a principal component and an organic metal complex including at least one kind of metal selected from group 7 or 11 of the periodic table as a sub component and a blocking layer containing a compound expressed in the following general formula (I) is included between the luminous layer and the cathode. (R1, R2, R3, R4, R5 and R6 are each hydrogen atom or optional substituent and M represents a metal atom selected from aluminum, gallium and indium. X is expressed as one of formulae (1a), (1b), (1c) shown below). (Ar1, Ar2, Ar3, Ar4 and Ar5 are each an aromatic hydrocarbon group containing a substituent or an aromatic heterocyclic group containing a substituent, and Y represents silicon or germanium).
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