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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.:

US 12342715 B1

PDFFull Text
Date of Patent:
Jun. 24, 2025

Filed:

Jul. 25, 2023

Highly efficient oled devices with very short decay times

Applicant:

Udc Ireland Limited, Ballycoolin, IE;

Inventors:

Christian Lennartz, Schifferstadt, DE;

Stefan Metz, Mannheim, DE;

Korinna Dormann, Bad Durkheim, DE;

Gerhard Wagenblast, Wachenheim, DE;

Ute Heinemeyer, Neustadt, DE;

Hannah Mangold, Karlsruhe, DE;

Minlu Zhang, Bad Durkheim, DE;

Thomas Holcombe, Schifferstadt, DE;

Assignee:

UDC IRELAND LIMITED, Ballycoolin, IE;

Attorney:

Riverside Law LLP

Primary Examiner:

Jack S Chen

Int. Cl.
CPC ...
H10K 85/30 (2023.01); C09K 11/02 (2006.01); C09K 11/06 (2006.01); H10K 50/12 (2023.01); H10K 85/10 (2023.01); H10K 85/40 (2023.01); H10K 85/60 (2023.01); H10K 50/15 (2023.01); H10K 50/16 (2023.01); H10K 50/17 (2023.01); H10K 50/18 (2023.01); H10K 101/00 (2023.01);
U.S. Cl.
CPC ...
H10K 85/342 (2023.02); C09K 11/025 (2013.01); C09K 11/06 (2013.01); H10K 50/121 (2023.02); H10K 85/10 (2023.02); H10K 85/322 (2023.02); H10K 85/361 (2023.02); H10K 85/371 (2023.02); H10K 85/40 (2023.02); H10K 85/623 (2023.02); H10K 85/631 (2023.02); H10K 85/633 (2023.02); H10K 85/657 (2023.02); H10K 85/6572 (2023.02); H10K 85/6574 (2023.02); C09K 2211/1007 (2013.01); C09K 2211/1014 (2013.01); C09K 2211/1022 (2013.01); C09K 2211/1029 (2013.01); C09K 2211/1044 (2013.01); C09K 2211/1059 (2013.01); C09K 2211/1088 (2013.01); C09K 2211/185 (2013.01); C09K 2211/188 (2013.01); H10K 50/15 (2023.02); H10K 50/16 (2023.02); H10K 50/17 (2023.02); H10K 50/171 (2023.02); H10K 50/18 (2023.02); H10K 85/615 (2023.02); H10K 85/652 (2023.02); H10K 2101/00 (2023.02); H10K 2101/90 (2023.02); Y02E 10/549 (2013.01);
Abstract

The present invention relates to organic light-emitting devices comprising (a) an anode, (i) a cathode, and (e) an emitting layer between the anode and cathode, comprising 2 to 40% by weight of a triplet emitter X having a difference of the singlet energy (E(X)) and the triplet energy (E(X)) of less than or equal to 0.4 eV [Δ(E(X)) −(E(X))≤0.4 eV], 0.05 to 5.0% by weight of a fluorescent emitter Y and 55 to 97.95% by weight of a host compound(s), wherein the amount of the triplet emitter X, the fluorescent emitter Y and the host compound(s) adds up to a total of 100% by weight and the singlet energy of the triplet emitter X(E(X)) is greater than the singlet energy of the fluorescent emitter Y(E(Y)) [(E(X))>E(Y)]. By doping, for example, an emitting layer containing a luminescent organometallic complex having a small S-Tsplitting, with a fluorescent emitter the emission decay time can significantly be shortened without sacrificing external quantum efficiency (EQE) because of very efficient energy transfer.

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