Patent ID: 8344613

Claim:
An organic electroluminescence display device having an organic electroluminescence element that is provided with an anode electrode, an organic electroluminescence layer having at least a four-layer structure formed on the anode electrode, and a cathode electrode formed on the organic electroluminescence layer, the organic electroluminescence element comprising: a first layer that is in direct contact with the anode electrode and contains a first substance that exhibits electron transport properties, and a second substance that exhibits electron-donating properties with respect to the first substance; a second layer that is in contact with the first layer and contains a third substance that exhibits hole transport properties; a third layer that is in contact with the second layer and contains a light-emitting substance; a fourth layer that is in direct contact with the third layer and contains a substance that exhibits electron transport properties; and a fifth layer disposed between the cathode electrode and the fourth layer and containing a same substance as the first layer.