Organic electroluminescence device

Abstract

An organic electroluminescent device, including: a cathode; an anode; and organic layers including at least an emitting layer and an electron-transporting layer between the cathode and the anode, the electron-transporting material with the slowest electron mobility constituting the electron-transporting layer having an electron mobility of 2.0×10−5 cm2/Vs or more in an electric field intensity of 0.4 to 0.5 MV/cm, the electron mobility/hole mobility (ΔEM) of a host material constituting the emitting layer, and the electron mobility/hole mobility (ΔET) of the electron-transporting material with the slowest electron mobility constituting the electron-transporting layer satisfying the following relationship: ΔET>1, 0.3≦ΔEM≦10, and ΔET>ΔEM.

Dependencies are inferred from the claim text.