| abstract |
Provided is an organic electroluminescent device which is suitable for use in full-color and multicolor panels and shows higher luminous efficiency and better driving stability than organic electroluminescent devices utilizing luminescence from the singlet state. The organic electroluminescent device comprises a substrate 1 and an anode 2 , organic layers, and a cathode 8 piled one upon another on the substrate, at least one of the organic layers comprises a light-emitting layer 5 containing a host material and a dopant material, and a compound having 2 to 4 pyrazole structures represented by the following formula I (wherein Ar 4 to Ar 6 are independently hydrogen or substituted or unsubstituted aromatic hydrocarbon groups or aromatic heterocyclic groups) is used as said host material. |