While organic EL element

US11251375B2 · kind B2 · utility

Assignee

• Canon Kabushiki Kaisha · JP

Inventors

• Itaru Takaya · Chiba, JP
• Naoki Yamada · Tokyo, JP

Key dates

• Filing date: Nov 14, 2019
• Grant date: Feb 15, 2022
• Expiry date: Nov 14, 2039

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K2101/40

Abstract

A white organic electroluminescent (EL) element including an anode, a cathode, and a light-emitting layer disposed between the anode and the cathode. The light-emitting layer includes a first light-emitting layer and a second light-emitting layer. The first light-emitting layer and the second light-emitting layer each contain a host material and a light-emitting dopant material. The first light-emitting layer contains, as the light-emitting dopant material, a green-light-emitting dopant material and a blue-light-emitting dopant material and is a dual-color light-emitting layer that emits green light and blue light. The second light-emitting layer contains, as the light-emitting dopant material, a red-light-emitting dopant material and a green-light-emitting dopant material and is a dual-color light-emitting layer that emits red light and green light.