Organic electroluminescent materials and devices

US10236456B2 · kind B2 · utility

Assignee

• UNIVERSAL DISPLAY CORPORATION · US

Inventors

• Jui-Yi Tsai · Newtown, US
• Lichang Zeng · Lawrenceville, US
• Alexey Borisovich Dyatkin · Ambler, US
• Walter Yeager · Yardley, US
• Edward Barron · Hillsborough Township, US
• Bin Ma · Plainsboro, US
• Chuanjun Xia · Lawrenceville, US

Key dates

• Filing date: Mar 24, 2017
• Grant date: Mar 19, 2019
• Expiry date: Mar 24, 2037

Classification

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

Abstract

A compound that includes a ligand L, having the formula, is provided. In the structure of Formula I, each R1, R2, R3, R4, R4, R5, R6, R7, and R8 is independently selected from a variety of substituents; any adjacent substituents are optionally joined or fused into a ring; at least one of R3, R4, and R5 is not hydrogen; “a” is an integer from 0 to 10; (i) when a is 0, at least one of R7, R8, and an R2 adjacent to ring B, is not hydrogen, and (ii) when a is 1 to 10, at least one of an R2 adjacent to ring A and an R6 adjacent to ring C is not hydrogen; ligand L is coordinated to a metal M having an atomic weight greater than 40; and ligand L is optionally linked with other ligands to comprise a tridentate, tetradentate, pentadentate or hexadentate ligand.