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:
Dec. 22, 2020
Filed:
Feb. 22, 2017
Novaled Gmbh, Dresden, DE;
Kay Lederer, Dresden, DE;
Steffen Runge, Dresden, DE;
Jan Blochwitz-Nimoth, Dresden, DE;
Felix Limberg, Munich, DE;
Hartmut Krüger, Munich, DE;
Novaled GmbH, Dresden, DE;
Abstract
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.