The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 21, 2001
Filed:
Mar. 20, 1999
Friedrich Koch, Walsrode, DE;
Helmut Werner Heuer, Krefeld, DE;
Rolf Wehrmann, Krefeld, DE;
Martin Deussen, Marburg, DE;
Andreas Elschner, Mülheim, DE;
Bayer AG, Leverkusen, DE;
Abstract
Electroluminescent assemblies containing a substrate, an anode, an electroluminescent element and a cathode, where at least one of the two electrodes is transparent in the visible spectral region and the electroluminescent element can contain in order: a hole injection zone, hole transport zone, electroluminescent zone, electron transport zone and/or an electron injection zone, characterized in that the hole injection and hole transport zone is a substituted or unsubstituted 1,3,5-tris(aminophenyl)benzene compound A or a mixture thereof and the electroluminescent element may, if desired, contain a further functionalized compound selected from the group consisting of hole transport materials, a luminescent material B and, if desired, electron transport materials, where the hole injection and hole transport zone can contain, in addition to the component A, one or more further hole transport compounds, where at least one zone is present, individual zones can be left out and the zone(s) present can assume a plurality of functions.