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:
Feb. 25, 2025
Filed:
Aug. 03, 2023
Universal Display Corporation, Ewing, NJ (US);
Eric A. Margulies, Ewing, NJ (US);
Zhiqiang Ji, Ewing, NJ (US);
Nicholas J. Thompson, Ewing, NJ (US);
Geza Szigethy, Newtown, PA (US);
Michael S. Weaver, Ewing, NJ (US);
Jerald Feldman, Wilmington, DE (US);
UNIVERSAL DISPLAY CORPORATION, Ewing, NJ (US);
Abstract
Provided is an OLED structure includes an organic layer having a primary phosphorescent emitter and a first host; where one of the following conditions is true: (1) the organic layer further includes a secondary emitter; or (2) the OLED further includes a second organic layer where the second organic layer includes a secondary emitter. The primary phosphorescent emitter has a peak emission wavelength λmax that is ≥600 nm and ≤750 nm; the secondary emitter has a peak emission wavelength λmax that is ≥750 nm; the primary phosphorescent emitter is capable of transferring energy to the secondary emitter; the first host has a lowest excited state triplet energy T1 that is at least 0.1 eV higher than that of the primary phosphorescent emitter; the primary phosphorescent emitter has the formula Pt(L); Lcan represent one or more ligands that are the same or different; each Lis independently monodentate or multidentate; and m represents a maximum possible number of ligands Lthat can coordinate to Pt.