Organic electroluminescence device

Abstract

Disclosed is an organic electroluminescence device containing a pair of electrodes on a substrate, two or more luminescence layers disposed between the electrodes, and an intermediate layer containing a charge transporting material and disposed between the two or more luminescence layers, each of the two or more luminescence layers contains at least one phosphorescence material selected from a blue phosphorescence material having an emission peak from 420 nm to less than 500 nm, a green phosphorescence material having an emission peak from 500 nm to less than 570 nm, and a red phosphorescence material having an emission peak from 570 nm to 650 nm, the phosphorescence material contained in the respective luminescence layers having different emission peaks from one another; and the charge transporting material contained in the intermediate layer has an energy difference (T1) of 2.7 eV or more between a ground state and an excited triplet state and the energy difference (T1) of the charge transporting material is higher by at least 0.15 eV than T1 of a phosphorescence material having the shortest wavelength emission among the phosphorescence materials contained in the two or more luminescence layers.

Dependencies are inferred from the claim text.