Patent ID: 8288763

Claim:
An organic electroluminescence device comprising 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, wherein: 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; the charge transporting material contained in the intermediate layer has an energy difference (T 1 ) of 2.7 eV or more between a ground state and an excited triplet state and the energy difference (T 1 ) of the charge transporting material is higher by at least 0.15 eV than T 1 of a phosphorescence material having the shortest wavelength emission among the phosphorescence materials contained in the two or more luminescence layers; the two or more luminescence layers comprise a layer containing the blue phosphorescence material and a layer containing the green phosphorescence material and the red phosphorescence material; and each of the two or more luminescence layers further contains a host material wherein the host material is different from the charge transporting material contained in the intermediate layer.