Electron impeding layer for high efficiency phosphorescent OLEDs

US8148891B2 · kind B2 · utility

Assignee

• UNIVERSAL DISPLAY CORPORATION · US

Inventors

• Yeh-Jiun Tung · Princeton, US
• Brian D'Andrade · Willingboro, US
• Michael S. Weaver · Princeton, US
• James Esler · Yardley, US

Key dates

• Filing date: Oct 4, 2005
• Grant date: Apr 3, 2012
• Expiry date: Nov 4, 2027

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S428/917

Abstract

The present invention relates to OLEDs comprising an electron impeding layer between the cathode and the emissive layer. 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; an electron transport layer; and a cathode disposed, in that order, over a substrate.