ORGANIC ELECTROLUMINESCENT ELEMENT

摘要

Disclosed is an organic electroluminescent element (organic EL element) having a simple structure, wherein luminous efficiency of the element is improved and driving stability is sufficiently assured. The organic EL element has a light-emitting layer between an anode and a cathode arranged on a substrate.  The light-emitting layer contains (A) a phosphorescent dopant having an emission peak wavelength longer than 600 nm and (B) a host material.  The host material contains at least two kinds of compounds selected from two or more kinds of derivatives among (b1) N-substituted indolocarbazole derivatives, (b2) derivatives of aluminum-8-hydroxyquinoline complex and (b3) bisindolocarbazole derivatives.