Light emitting element and display device

US11276834B2 · kind B2 · utility

Assignee

• SONY GROUP CORPORATION · JP

Inventors

• Shoji Sudo · Yokohama, JP
• Masahiro Kawamura · Sodegaura, JP
• Masakazu Funahashi · Sodegaura, JP

Key dates

• Filing date: Dec 12, 2016
• Grant date: Mar 15, 2022
• Expiry date: Dec 12, 2036

Classification

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

Abstract

A light emitting element includes a structure in which an anode 51, an organic layer 70 containing an organic material and including a light emitting layer, and a cathode 52 are stacked. The light emitting layer includes, from a side of the anode to a side of the cathode, two or more light emitting regions configured to emit different colors of light. Each light emitting region contains a host material and a dopant material. An absolute value of an ionization potential of the host material contained in a light emitting region near to the cathode is larger than an absolute value of an ionization potential of the host material contained in a light emitting region near to the anode.