Conjugated polycarbazole derivatives in Organic Light Emitting Diodes

US6630254B2 · kind B2 · utility

Assignee

• National Research Council of Canada · CA

Inventors

• Mario Leclerc · Keyano, CA
• Jean-Francois Morin · Audet, CA
• Isabelle Levesque · Keyano, CA
• Marie D'Iorio · Ottawa, CA
• Christophe Py · Ottawa, CA

Key dates

• Filing date: Apr 10, 2001
• Grant date: Oct 7, 2003
• Expiry date: Jul 11, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S428/917

Abstract

An Organic Light Emitting Diode (OLED) includes as active material a conjugated poly(N-alkyl-2,7-carbazole) derivative described by the formula: wherein n is an integer of about 3 to about 100, and R represents a substituant that is a linear or branched alkyl group containing 1 to 22 carbon atoms, or poly(ethyleneoxy), cyano, aryl, amide or benzoyl. Such OLEDs have improved light emitting properties, especially in the blue and red regions of the spectrum.