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:
Jun. 05, 2012
Filed:
Jun. 23, 2009
Thomas Schäfer, Liestal, CH;
Thomas Eichenberger, Basel, CH;
Kristina Bardon, Waldshut, DE;
Andrea Ricci, Zürich, CH;
Natalia Chebotareva, Hagenthal le Bas, FR;
Thomas Schäfer, Liestal, CH;
Thomas Eichenberger, Basel, CH;
Kristina Bardon, Waldshut, DE;
Andrea Ricci, Zürich, CH;
Natalia Chebotareva, Hagenthal le Bas, FR;
BASF SE, Ludwigshafen, DE;
Abstract
The present invention relates to electronic devices, especially electroluminescent devices, comprising azapyrenes of formula (I), or formula (III), wherein Y, Y, Y, Y, X, Xand Xare independently each other N, or CR, with the proviso that at least one of the groups X, Xand Xis a group CR, Ris hydrogen, F, —SiRRR, or an organic substituent, Ris hydrogen, F, —SiRRR, or an organic substituent, or any of the substituents R, Rand R, which are adjacent to each other, together form an aromatic, or heteroaromatic ring, or ring system, which can optionally be substituted, m is an integer of 1 to 6, and R, Rand Rare independently of each other a C-Calkyl group, a C-Caryl group, or a C-Caralkyl group, which may optionally be substituted, and Q is a linking group; with the proviso that in the compound of formula (III) at least one of the substituents R, or Ris a group Q; especially as host for phosphorescent emitters, electron transporting materials, or emitter materials. The hosts may function with phosphorescent materials to provide improved efficiency, stability, manufacturability, or spectral characteristics of electroluminescent devices.