Patent ID: 7173370
Filing Date: 2007-02-06
Classification: H01L

Abstract:
1. An organic light emitting element comprising: an anode; a cathode; and an organic compound film provided between the anode and the cathode, wherein the organic compound film comprises a hole transporting region comprising a hole transporting material and an electron transporting region comprising an electron transporting material; wherein a mixed region having a first portion and a second portion and comprising both the hole transporting material and the electron transporting material is provided between the hole transporting region and the electron transporting region; wherein a material for exhibiting red color light emission from a triplet excitation state is added to the first portion of the mixed region, the first portion being apart from at least one of the hole transporting region and the electron transporting region; wherein the material for exhibiting red color light emission from a triplet excitation state is not added to the second portion of the mixed region; and wherein one of the hole transporting material and the electron transporting material in the mixed region is a host material for the material for exhibiting red color light emission from a triplet excitation state.