Patent ID: 11895857
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: nan (nan)
Classification: CPC H | IPC H

Claim 0:
1. An organic light emitting element comprising:
a first electrode;
a hole transport region disposed on the first electrode;
an emission layer disposed on the hole transport region;
an electron transport region disposed on the emission layer, the electron transport region including an electron transport layer; and
a second electrode disposed on the electron transport region, wherein
the hole transport region comprises:
a first hole transport layer having a first refractive index;
a second hole transport layer disposed above the first hole transport layer, the second hole transport layer having a second refractive index less than the first refractive index; and
a third hole transport layer disposed below the first hole transport layer, the third hole transport layer having a third refractive index less than the first refractive index,

a difference between the first refractive index and the second refractive index is in a range of about 0.1 to about 1.0, and
a difference between the first refractive index and the third refractive index is in a range of about 0.1 to about 1.0.