Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Novaled Gmbh

Hartmut Krüger

Jan Blochwitz-Nimoth

Steffen Runge

Kay Lederer

Armin Wedel

Felix Limberg

Silvia Janietz

Sebastian Risse

Björn Kussmaul

Guggi Kofod

Dessislava Sainova

The present invention relates to a charge transporting semi-conducting material comprising: a) at least one electrical dopant, and b) a branched or cross-linked charge-transporting polymer comprising cyclobutenone cross-linking units of at least one of the general formulae la and/or lb, wherein aa) Pol, Pol, Poland Polare independently selected chains of the charge-transporting polymer, bb) X, X, X, and Xare independently selected optional spacer units or, independently, represent direct bonding of Pol, Pol, Poland Polchains to the cyclobutenone ring, cc) Z, Z, Z, and Zare independently selected from H, halogen or a carbon-containing group; the charge transporting semi-conducting material being obtainable by a process comprising: i) providing a solution containing aaa) at least one precursor charge transporting compound comprising at least one covalently attacked alkenyloxy group having generic formula II wherein X is an optional spacer which is further linked to a charge transporting structural moiety of the precursor charge transporting compound, the dashed line represents the bonding to a charge transporting structural moiety of the precursor charge transporting compound and Z, Z, Z, and Zare independently selected from H, halogen or the carbon-containing group, bbb) at least one electrical dopant, ccc) at least one solvent, ii) depositing the solution on a substrate, iii) removing the solvent, and iv) reacting the alkinyloxy groups to effect crosslinking, preferably by heating, wherein the average number of the alkinyloxy groups per one molecule of the precursor charge transporting compound provided in the step i) is equal to or greater than 2, preferably greater than 2.05, and a process for preparing the same.

Charge transporting semi-conducting material and electronic device comprising it

The present invention relates to a polymer which has an electronic dipole covalently bonded to the polymer structure. The polymer structure forming the basis of the polymer is in particular an elastomer which can be unbranched, or also branched or crosslinked. The present invention equally describes a method for bonding a dipole molecule to a corresponding polymer structure or elastomer structure. The polymer in accordance with the invention can be present as a pure substance or also as a mixture with any other polymers, preferably with further elastomers. Uses of the polymer or of the obtained polymer blend will equally be provided.

Dielectric polymers with elevated permittivity, process for preparation thereof and end uses thereof

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Munich, Germany

Hartmut Krüger