White-emitting copolymers, representation and use thereof

US7696284B2 · kind B2 · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Aurelie Falcou · Mainz, DE
• Arne Büsing · Frankfurt, DE
• Susanne Heun · Bad Soden, DE
• Jürgen Steiger · Taipei, TW
• Anja Gerhard · Egelsbach, DE
• Niels Schulte · Kelkheim, DE
• Heinrich Becker · Königstein, DE

Key dates

• Filing date: Sep 17, 2004
• Grant date: Apr 13, 2010
• Expiry date: May 1, 2027

Classification

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

Abstract

The present invention relates to white-emitting copolymers which are obtained by a combination of blue-, green- and red-emitting repeating units. The copolymers of the invention display better film formation and an improved efficiency when used in polymeric organic light-emitting diodes compared to materials according to the prior art.