| abstract |
(57) [Problem] To improve the luminous efficiency of an organic electroluminescent device utilizing phosphorescence and sufficiently secure driving stability. I will provide a. SOLUTION: In an organic electroluminescent device in which an anode, a light-emitting layer and a cathode are sequentially laminated on a substrate, the light-emitting layer contains a compound having an N-phenylcarbazole skeleton as a main component and a periodic rule as a sub-component. Hole blocking containing an organometallic complex containing at least one metal selected from Tables 7 to 11 and containing a compound represented by the following general formula (I) between the light emitting layer and the cathode An organic electroluminescent device comprising a layer. Embedded image (In the formula, R 1 to R 6 represent a hydrogen atom or an arbitrary substituent, M represents a metal atom selected from aluminum, gallium, and indium. In the general formula (I), X represents the following general formula ( It is represented by any of Ia), (Ib) and (Ic). (Wherein, Ar 1 to Ar 5 represent an aromatic hydrocarbon ring group which may have a substituent or an aromatic heterocyclic group which may have a substituent, and Y represents silicon or germanium. Represents.) |