Organic red electro-luminescent device including a heterocyclic emitter

US6869696B2 · 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: Mar 22, 2005
• Expiry date: Jun 15, 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 concerns an electro-luminescent device in which the luminescent layer contains a compound of general formula I as doping agent or as luminescent compound, whereby the radicals R1 to R12 are identical or are different, and mean hydrogen, straight chain or branched C1-C6 alkyl, aralkyl, aryl or substituted aryl; R1 and R2 and/or R3 and R4 and/or R4 and R5 and/or R5 and R11 and/or R8 and R5 and/or R4 and R12 can form an alicyclic, heterocyclic or aromatic ring; R5 can furthermore be H, OH, OR9, N,N-di-(C1-C6) alkylamino, acetylamino or halogen; R6 and R7 together can form an alicyclic or heterocyclic ring; A1 and A2 are identical or different and are —CN, —NO2 or —COOR8; X is —CH, —CR11 or N; and Y is O, —NH, —NR12, S or Se. The doping agents together luminesce predominately red with very good quantum efficiency together with the luminescent compound as a function of concentration.