Hoechst Aktiengesellschaft

Bayer Aktiengesellschaft

Gunther Leising

Ullrich Scherf

Klaus Mullen

Josef Salbeck

Thomas Stehlin

Hermann Schenk

Roland Stern

Donald Lupo

Rolf Wehrmann

Friedrich-Karl Bruder

Andreas Elschner

Stefan Tasch

Farideh Meghdadi

Stefan Hampel

Joachim Huber

Martin Kreyenschmidt

Christoph Brandstatter

Berthold Winkler

Rainer Friedbert Mahrt

A substrate ( ) for a solid-state laser based on organic and/or inorganic laser material, and a solid-state laser are described, in which the substrate ( ) consists of thermoplastic or thermoset and is structured on at least one surface ( ), the structured surface ( ) of the substrate ( ) having a periodic surface profile ( ).

Plastic substrate for solid-state laser

An electroluminescence color display screen comprising an organic electroluminescence layer disposed between a patterned base electrode layer and a patterned top electrode layer, and further comprising a color conversion layer and a spectrally selective reflector for improving the color efficiency of the color display screen.

Organic electroluminescence devices and displays

Use of polymers containing isolated chromophores as electroluminescence

Poly(4,5,9,10-tetrahydropyrene-2,7-diyl) derivatives of the formula (I) ##STR1## where the symbols R.sup.1 to R.sup.4 have the following meanings: R.sup.1, R.sup.2, R.sup.3, R.sup.4 are identically or variously H, a straight-chain or branched alkyl chain containing 1 to 22 carbon atoms, it being possible for one or more nonadjacent CH.sub.2 groups also to be replaced by --O--, --COO--, --OOC-- and/or phenylene, aryl or aryloxy groups, it being possible for the aromatic to be substituted by C.sub.1 -C.sub.22 -alkyl, C.sub.1 -C.sub.22 -alkoxy, Br, Cl, F, CN, and/or NO.sub.2, Br, Cl, F, CN, NO.sub.2, or carboalkoxy containing 2 to 23 carbon atoms; n is 10 to 150, are suitable as electroluminescence materials.

Poly(4,5,9,10-tetrahydropyrene-2,7-diyl) derivatives and their use as

Conjugated polymers containing ansa substructures and their use as electroluminescence materials. Conjugated polymers containing ansa substructures, which contain aromatic groups and in which adjacent aromatic groups are connected to one another in such a way that one ring atom of one aromatic group is directly linked to one ring atom of the other aromatic group and any further linkages of these two aromatic groups are possible only via a bridge containing at least one tetravalent carbon atom and/or heteroatom. The polymers of the invention having ansa substructures are outstandingly suitable as electroluminescence materials, since they have a very high color purity.

Conjugated polymers containing ANSA substructures and their use as

The present invention relates to polymers with an extended system of conjugated double bonds constructed as homo and/or heterocyclic rings which are interlinked in pairs so that one ring is joined to the neighboring one at two adjacent atoms in the ring, in which one of these connections is made by a chemical bond to a ring atom of the neighboring ring and the other via a carbon, nitrogen, oxygen or sulphur atom to an atom of the neighboring ring adjacent said ring atom, their production and use in electrical, electronic and opto-electronic components.

Ladder polymers containing conjugated double bonds

Growing community of inventors

Mainz-Kastel, Germany

Ullrich Scherf