| abstract |
An organic EL device suitable for use in a full-color or multi-color panel and having a higher luminous efficiency and improved driving stability than an organic EL device using light emission in a singlet state is provided.n n n It is an organic electroluminescent element in which the anode 2, the organic layer, and the cathode 8 are laminated | stacked on the board | substrate 1, The at least 1 organic layer is the light emitting layer 5 containing a host agent and a dope agent, This host As a agent, the compound which has 2-4 pyrazole structures represented by following formula I in the same molecule is used.n n n n n n n n (In formula, Ar < 4> -Ar < 6> respectively independently represents the aromatic hydrocarbon ring group or aromatic heterocyclic group which may have hydrogen or a substituent.)n n n n Light emitting layer, organic field, light emitting device, driving stability, metal complex, phosphorescence |