Light emitting devices and compounds

Active Publication Date: 2020-01-23
UNIVERSITY OF ST ANDREWS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Despite their highly desirable performance characteristics, the rarity of these metals, their high cost and th

Method used

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  • Light emitting devices and compounds
  • Light emitting devices and compounds
  • Light emitting devices and compounds

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General Synthetic Procedures

[0127]All the commercially available chemicals and reagent grade solvents were used as received. Air-sensitive reactions were performed under a nitrogen atmosphere using Schlenk techniques. Flash column chromatography was carried out using silica gel (Silia-P from Silicycle, 60 Å, 40-63 μm). Analytical thin-layer-chromatography (TLC) was performed with silica plates with aluminum backings (250 μm with F-254 indicator). TLC visualization was accomplished by 254 / 365 nm UV lamp. 1H, 13C and 19F NMR spectra were recorded on a Bruker Advance spectrometer. Melting points were measured using open-ended capillaries on an Electrothermal melting point apparatus and were uncorrected. High-resolution mass spectrometry (HRMS) was performed by EPSRC National Mass Spectrometry Service Centre (NMSSC), Swansea.

Synthesis of TADF Emitters with Heterocyclic Acceptor Moieties

[0128]Prior art TADF compound “2CzPN”:

[0129]The synthesis was largely adopted from literature. (refere...

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Abstract

Thermally Activated Delayed Fluorescence (TADF) compounds wherein two aromatic heterocyclic moieties are provided as acceptor groups, spaced apart from two donor moieties by an aromatic spacer ring, are described. Charged organic TADF species having a similar structure are also described. The TADF compounds and charged organic TADF species may be employed as emitter material in light emitting devices such as OLEDs and LEECs. Also described TADF compounds wherein at least one donor moiety is substituted by at least one substituent that is a phosphine oxide or a phosphine sulphide.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a 35 U.S.C. § 371 National Stage Application of International Application No. PCT / GB2015 / 054171, filed Dec. 29, 2015, which claims the benefit of UK Application No. 1507340.6 filed on Apr. 29, 2015, the entirety of each of which is incorporated herein by reference.FIELD OF THE INVENTION[0002]The present invention is directed to the provision of Thermally Activated Delayed Fluorescence (TADF) compounds for use in OLEDs or other light emitting devices.BACKGROUND TO THE INVENTION[0003]Organic Light Emitting Diodes (OLEDs) have come to the fore as the state-of-the-art technology for visual displays and lighting. OLEDs are desirable as they are light-weight, flexible, provide better contrast and possess large viewing angle. OLEDs are also more power efficient than traditional lighting sources and thus their wide adoption can alleviate significantly the strain on current energy demand because lighting alone constitutes about...

Claims

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Application Information

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IPC IPC(8): H01L51/00C07D413/14C09K11/06C07D417/10C07D265/38C07D279/22C07F9/572
CPCC09K11/06C07F9/5728H01L51/007H01L51/0071C07D279/22C07D417/10H01L51/0072C07D413/14C07D265/38H01L51/5016C07D413/10C07F9/572C09K2211/1033C09K2211/1037C09K2211/1007C09K2211/1029H10K85/6565H10K85/657H10K85/6572H10K50/11H10K2101/20C09K2211/1048H10K50/135H10K2101/10C09K2211/1018
Inventor ZYSMAN-COLMAN, ELIWONG, MICHAEL
Owner UNIVERSITY OF ST ANDREWS
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