Organic light emitting materials and devices

US6916554B2 · kind B2 · utility

Assignees

• University of Southern California · US
• UNIVERSAL DISPLAY CORPORATION · US

Inventors

• Bin Ma · Plainsboro, US
• Robert W. Walters · Pittsburgh, US
• David B. Knowles · Vandergrift, US
• Raymond Kwong · Plainsboro, US
• Yeh-Jiun Tung · Princeton, US
• Peter Djurovich · Long Beach, US
• Mark E. Thompson · Villa Park, US

Key dates

• Filing date: Nov 6, 2002
• Grant date: Jul 12, 2005
• Expiry date: Dec 29, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S428/917
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

An organic light emitting device is provided. The device has an anode, a cathode, and an emissive layer disposed between the anode and the cathode. The emissive layer further comprises an emissive material having the structure: M may be a metal having an atomic weight greater than 40. R3 may be a substituent having a Hammett value less than about −0.17, between about −0.15 and 0.05, or greater than about 0.07. R5 may be H or any substituent. A may be a 5 or 6 member heteroaryl ring system. “m” may be at least 1. “n” may be at least zero. (X-Y) may be an ancillary ligand. The emissive material itself is also provided. The emissive material may have improved stability, and may provide a saturated blue emission.