ORGANIC EL ELEMENT AND ORGANIC LIGHT-EMITTING DEVICE

摘要

To provide an organic EL element having high efficiency and long life, without accumulating holes at the interface between a light-emitting layer and a layer on the cathode side, and an organic light-emitting device. An organic EL element having a light-emitting layer between an anode and a cathode, wherein the light-emitting layer contains a light-emitting material and a charge-transporting material, the element has a hole relaxation layer adjacent to the cathode side of the light-emitting layer, the hole relaxation layer contains a hole-relaxing material, the hole-relaxing material is an organic compound having a hole-transporting unit and an electron-transporting unit, and at least one type of the charge-transporting material and at least one type of the hole-relaxing material are the same organic compound; and an organic light-emitting device containing such an element.