Stability OLED materials and devices

US11404650B2 · kind B2 · utility

Assignee

• UNIVERSAL DISPLAY CORPORATION · US

Inventors

• Chun Lin · Yardley, US
• Peter Borden Mackenzie · Murrysville, US
• Robert W. Walters · Pittsburgh, US
• Jui-Yi Tsai · Newtown, US
• Cory S. Brown · Pittsburgh, US
• Jun Deng · Murrysville, US

Key dates

• Filing date: Jul 1, 2019
• Grant date: Aug 2, 2022
• Expiry date: Apr 2, 2040

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/549
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Organic light emitting materials and devices comprising phosphorescent metal complexes comprising ligands comprising aryl or heteroaryl groups substituted at both ortho positions are described. An organic light emitting device, comprising: an anode, a hole transport layer; an organic emissive layer comprising an emissive layer host and an emissive dopant; an electron impeding layer; and electron transport layer; and a cathode disposed, in that order, over a substrate.