OLED electron-injecting layer

US7629741B2 · kind B2 · utility

Assignee

• EASTMAN KODAK COMPANY · US

Inventors

• Liang-Sheng Liao · Rochester, US
• Wojciech K. Slusarek · Rochester, US
• Michele L. Ricks · Rochester, US
• Ralph H. Young · Rochester, US
• Dustin L. Comfort · Webster, US

Key dates

• Filing date: May 6, 2005
• Grant date: Dec 8, 2009
• Expiry date: Dec 20, 2026

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24942

Abstract

An OLED includes an anode, a light-emitting layer disposed over the anode, and a first electron-injecting layer disposed over the light-emitting layer, wherein the first electron-injecting layer includes at least one organic host material having a reduction potential less than −1.0 V vs. a Saturated Calomel Electrode and at least one dopant material capable of reducing the organic host material. The OLED also includes a second electron-injecting layer disposed in contact with the first electron-injecting layer, wherein the second electron-injecting layer includes at least one organic material having a reduction potential greater than −1.0 V vs. a Saturated Calomel Electrode, and a cathode disposed over the second electron-injecting layer.