Patent ID: 9553278
Date: 2017-01-24
CPC Classifications: H01L

Claim:
1. An organic electroluminescence element comprising: a pair of electrodes including an anode and a cathode; and an organic layer including multiple light-emitting layers, the multiple light-emitting layers including a blue light-emitting layer including a blue light-emitting dopant, wherein, when an emission color of the organic electroluminescence element operated at an operation temperature for a stable state is represented in a CIE1931 chromaticity coordinate system, a coordinate point A of the emission color at an early stage of use is represented by (x when amounts of changes in an x value and a y value from the coordinate point A to the coordinate point B are represented by equations of Δx=x both the coordinate point A and the coordinate point B being within one MacAdam ellipse; the organic electroluminescence element comprising a multi-unit structure in which the multiple light-emitting layers are distributed to multiple light-emitting units; the multi-unit structure comprising a structure in which the multiple light-emitting units are stacked between the pair of electrodes; the multiple light-emitting units including a blue-based light-emitting unit including the blue light-emitting layer and a non-blue-based light-emitting unit not including the blue light-emitting layer; the blue-based light-emitting unit being a fluorescent light-emitting unit configured to cause fluorescence; the non-blue-based light-emitting unit being a phosphorescent light-emitting unit configured to cause phosphorescence; the non-blue-based light-emitting unit including a red light-emitting layer and a green light-emitting layer which is adjacent to the red light-emitting layer, and the green light-emitting layer is closer to the cathode than the red light-emitting layer; and when the emission color of the organic electroluminescence element operated at the operation temperature for the stable state is represented in the CIE1931 chromaticity coordinate system, the organic electroluminescence element showing at least one of: a chromaticity change of the blue-based light-emitting unit in which an x value of the emission color deteriorated by use is greater than an x value of the emission color at the early stage of use; and a chromaticity change of the non-blue-based light-emitting unit in which a y value of the emission color deteriorated by use is greater than a y value of the emission color at the early stage of use.