Patent · US Active

Organic light emitting diode

US11839145B2 · kind B2 · utility

0Cited by

5References

17Claims

0Family size

Assignee

SAMSUNG ELECTRONICS CO., LTD. · KR

Inventors

Jimyoung Ye · Yongin-si, KR
Hyomin Ko · Yongin-si, KR

Key dates

Filing date	Jul 7, 2020
Grant date	Dec 5, 2023
Priority date	—
Expiry date	Nov 3, 2041

Classification

Technology area (CPC H)Electricity
CPC primaryH10K2102/351
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

An organic light emitting diode includes 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, and a second electrode disposed on the electron transport region. The hole transport region includes a first hole transport layer which is directly disposed on the lower portion of the emission layer and has a first refractive index, and a second hole transport layer which is disposed on the lower portion of the first hole transport layer and has a second refractive index, thereby exhibiting an improved luminous efficiency characteristic.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.