Phosphorescent materials

US9034483B2 · kind B2 · utility

Assignee

• UNIVERSAL DISPLAY CORPORATION · US

Inventors

• Bert Alleyne · Ewing, US
• Raymond Kwong · Plainsboro, US
• Walter Yeager · Yardley, US
• Chuanjun Xia · Lawrenceville, US

Key dates

• Filing date: Sep 15, 2009
• Grant date: May 19, 2015
• Expiry date: Oct 11, 2030

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K2102/103
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Phosphorescent materials and devices having high efficiency and stability, narrow spectrum, and improved processibility. In particular, iridium complexes containing acac-derived ligands with branched alkyl substituents with branching at a position further than the α position to the carbonyl group, were found to be suitable for use as emitters in OLED devices.