| 摘要 |
An organic electroluminescence device comprising a cathode, an anode and, sandwiched between the cathode and the anode, at least a hole transporting layer and a light emitting layer containing a phosphorescent light emitting material and a host material, wherein the hole transporting layer comprises a hole transporting material having a triplet energy of 2.52 to 3.70 eV and a hole mobility of 10-6 cm2/Vs or higher as measured at a field intensity of 0.1 to 0.6 MV/cm. Thus, the organic electroluminescence device utilizing a phosphorescent light emission according to the present invention can exhibit a favorable current efficiency and a long lifetime.
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