ORGANIC ELECTROLUMINESCENT DEVICE

摘要

Disclosed is an organic EL device having low driving voltage and high luminous efficiency. Specifically disclosed is an organic EL device wherein a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer and an electron injection layer are arranged between an anode and a cathode.This organic EL device is characterized in that the hole injection layer is obtained by doping a hole injection layer material with an electron accepting impurity, and the ionization potential Ip (HIL) of the hole injection layer material of the hole injection layer, the ionization potential Ip (HTL) of the hole transport layer material, and the ionization potential Ip (EML) of the light-emitting layer material satisfy the following relation: Ip(EML) > Ip(HTL) = Ip(HIL) = Ip(EML) - 0.4 eV.