Organic light-emitting diode and display device comprising the same

US10707448B2 · kind B2 · utility

Assignee

• LG Display Co., Ltd. · KR

Inventors

• Jiyoung Kim · Yongin-si, KR
• Seung Tae Kim · Seoul, KR
• Jungsoo Park · Seoul, KR

Key dates

• Filing date: Jul 29, 2019
• Grant date: Jul 7, 2020
• Expiry date: Jul 29, 2039

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K2102/351

Abstract

An organic light-emitting diode includes a first electrode, a first light-emitting unit (EL unit) disposed on the first electrode and including a first organic light-emitting layer, a first charge generating layer on the first EL unit, a second EL unit disposed on the first charge generating layer and including a second organic light-emitting layer, a third organic light-emitting layer and a fourth organic light-emitting layer, a second charge generating layer on the second EL unit, a third EL unit disposed on the second charge generating layer and including a fifth organic light-emitting layer, and a second electrode on the third EL unit. A dopant concentration of the third organic light-emitting layer is greater than a dopant concentration of the fourth organic light-emitting layer. An organic light emitting display device can include the organic light-emitting diode.