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:
Nov. 25, 2025
Filed:
Sep. 12, 2019
Merck Patent Gmbh, Darmstadt, DE;
Ilona Stengel, Darmstadt, DE;
Antonia Horn, Offenbach, DE;
Falk May, Mainz, DE;
Aaron Lackner, Mannheim, DE;
Christof Pflumm, Darmstadt, DE;
Amel Mekic, Darmstadt, DE;
Nils Haase, Darmstadt, DE;
Merck Patent GmbH, Darmstadt, DE;
Abstract
The present invention describes electronic devices and compositions that can be used in electronic devices, the electronic devices including a sensitizer and a fluorescent emitter, wherein the sensitizer is a phosphorescent compound and wherein at least one of the two following conditions (I) or (II) must be satisfied, it being preferable when condition (I) is satisfied:(FE)−()≥ (I)(FE)−()≤ (II)wherein, e.g., X, Y are each −0.5 eV; S(FE) is the energy of the first excited singlet state of the fluorescent emitter; S(S) is the energy of the first excited state of the sensitizer; S(FE) is the energy of the first excited singlet state of the fluorescent emitter; S(S) is the energy of the first excited state of the sensitizer; and wherein the photoluminescence spectra of the sensitizer and of the fluorescent emitter are determined at room temperature.