Light Emitting Element and Display Device Using The Same

A light emitting element comprising:

• a first electrode;
• a second electrode;
• a first layer containing an oxide semiconductor and a material having a higher hole transporting property than an electron transporting property, between the first electrode and the second electrode;
• a second layer containing a light emitting material, between the first layer and the second electrode;
• a third layer containing an oxide semiconductor and a material having a higher electron transporting property than a hole transporting property, between the second layer and the second electrode.

A light emitting element comprising:

• a first electrode;
• a second electrode;
• a first layer containing a metal oxide and a material having a higher hole transporting property than an electron transporting property, between the first electrode and the second electrode;
• a second layer containing a light emitting material, between the first layer and the second electrode;
• a third layer containing a metal oxide and a material having a higher electron transporting property than a hole transporting property, between the second layer and the second electrode.

A light emitting element comprising:

• a first electrode;
• a second electrode;
• a first layer containing an oxide semiconductor and a material having a higher hole transporting property than an electron transporting property, between the first electrode and the second electrode;
• a second layer containing a light emitting material, between the first layer and the second electrode;
• a third layer containing an oxide semiconductor, a material having a higher electron transporting property than a hole transporting property, and a material which can donate an electron to the material having a higher electron transporting property than a hole transporting property, between the second layer and the second electrode.

A light emitting element comprising:

• a first electrode;
• a second electrode;
• a first layer containing a metal oxide and a material having a higher hole transporting property than an electron transporting property, between the first electrode and the second electrode;
• a second layer containing a light emitting material, between the first layer and the second electrode;
• a third layer containing a metal oxide, a material having a higher electron transporting property than a hole transporting property, and a material which can donate an electron to the material having a higher electron transporting property than a hole transporting property, between the second layer and the second electrode.