Patent ID: 11925045
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: nan (nan)
Classification: CPC H | IPC H

Claim 7:
8. A light emitting device comprising:
a first electrode;
a hole transport region on the first electrode;
a light emitting layer on the hole transport region and comprising a first light emitting material;
an electron transport region on the light emitting layer; and
a second electrode on the electron transport region,
wherein,
the hole transport region comprises a hole injection layer, a hole transport layer between the hole injection layer and the light emitting layer, and an electron blocking layer between the hole transport layer and the light emitting layer and being in contact with the light emitting layer,
the electron transport region comprises an electron injection layer, an electron transport layer between the electron injection layer and the light emitting layer, and a hole blocking layer between the electron transport layer and the light emitting layer and being in contact with the light emitting layer,
the electron blocking layer and the hole blocking layer comprise a second light emitting material different from the first light emitting material,
the first light emitting material is a material to generate blue light,
the second light emitting material is a material to generate green light, red light, and/or orange light having a higher wavelength than that of the first light emitting material, and
the electron blocking layer and the hole blocking layer comprising the second light emitting material each comprise a base substance and the second light emitting material doped in the base substance.