Organic red electro-luminescent device and dopant

US6844089B2 · kind B2 · utility

Assignee

• Sensient Imaging Technologies GmbH · DE

Inventors

• Andreas Richter · Gaimersheim, DE
• Dietmar Keil · Wolfen, DE
• Gerhard Diener · Harsefeld, DE

Key dates

• Filing date: May 10, 2002
• Grant date: Jan 18, 2005
• Expiry date: May 10, 2022

Classification

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

Abstract

The invention relates to an electroluminescent device, in which the luminescent layer contains a luminescent compound and a compound of the general formula I as doping agent, wherein B is an unsaturated carbocyclic or heterocyclic 4-8-link ring, which can also contain an alicyclic bridge, the rings D and E are five- or six-link rings, which each can contain one more hetero-atom N, O and S, the radicals R are one or more substituents H or straight-chain or branched C1-C6-alkyl, X and Y are carbon or nitrogen, R1; R2 and R9 are H or straight-chain or branched C1-C6-alkyl, R3 and R9 are hydrogen, straight-chain or branched C1-C6-alkyl, hydroxy, —OR16, —COOR16, N,N-dialkylamino, acetylamino or halogen, wherein R16 is hydrogen, or straight-chain or branched C1-C6-alkyl, R1 and R2 or R2 and R3 and/or R9 and R9 together can form an alicyclic, heterocyclic or aromatic ring, and A1 and A2, which can be the same or different, are cyan, nitro or —COOR16. The compounds I are partly new. Together with the luminescent compound, the doping agents have a red or white color, depending on the concentration, with excellent quantum efficiency.