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Organic electroluminescent element, display device, illumination device, luminescent layer forming composition, and compound

A technology for electroluminescent elements and light-emitting layers, applied in the fields of compositions and compounds for forming light-emitting layers, display devices and lighting devices, can solve the problem of high energy, efficiency, color purity and lifetime of emission dopants and auxiliary dopants There are problems such as problems, to achieve the effect of improving the characteristics of organic electroluminescence

Pending Publication Date: 2021-07-23
KWANSEI GAKUIN EDUCATIONAL FOUND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, regarding deep blue light emission, since high energy is required for both the emitting dopant and the auxiliary dopant, there is a problem in any of efficiency, color purity, and lifetime

Method used

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  • Organic electroluminescent element, display device, illumination device, luminescent layer forming composition, and compound
  • Organic electroluminescent element, display device, illumination device, luminescent layer forming composition, and compound
  • Organic electroluminescent element, display device, illumination device, luminescent layer forming composition, and compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0929] Hereinafter, the present invention will be specifically described through examples. Materials, processing contents, processing procedures, and the like shown below can be appropriately changed unless departing from the spirit of the present invention. Therefore, the scope of the present invention should not be limitedly interpreted by the specific examples shown below.

[0930] Synthesis examples of compounds used in Examples are shown below.

[0931] 1. Compound Synthesis

Synthetic example (1

[0933] Compound (ED1): N 7 ,N 7 ,N 13 ,N 13 ,5,9,11,15-octaphenyl-5,9,11,15-tetrahydro-5,9,11,15-tetraaza-19b,20b-diborabinaphtho[3,2 Synthesis of ,1-de:1',2',3'-jk]pentacene-7,13-diamine

[0934] [chem 161]

[0935]

[0936] [The first stage]

[0937] Under a nitrogen environment, put 1,3-dibromobenzene (25.0g, 106mmol), aniline (20.3ml, 223mmol), tris(dibenzylideneacetone)dipalladium(0)(Pd 2 (dba) 3 ) (971mg, 1.06mmol), 2,2'-bis(diphenylphosphino)-1,1'-binaphthyl (BINAP: 1.98g, 3.18mmol), NaOtBu (25.5g, 265mmol) and toluene (400ml ) flask was heated to 110°C and stirred for 18 hours. The reaction liquid was cooled to room temperature, filtered using silica gel (eluent: toluene), and the solvent was distilled off under reduced pressure to obtain a crude product. After dissolving the obtained crude product in toluene, an appropriate amount was distilled off under reduced pressure, hexane was added and reprecipitated, thereby obtaining N 1 ,N 3 - Diphenylbenzene-1...

Synthetic example (2

[0962] Compound (1-41): 2,12-di-tert-butyl-5,9-bis(4-(tert-butyl)phenyl)-7-methyl-5,9-dihydro-5,9- Synthesis of diaza-13b-boranaphtho[3,2,1-de]anthracene

[0963] [chem 166]

[0964]

[0965] Compound (1-41) was synthesized according to the method described in "Synthesis Example (32)" of International Publication No. 2015 / 102118.

[0966] Hereinafter, in Synthesis Example (1-2) to Synthesis Example (1-4), Synthesis Example (1-9) to Synthesis Example (1-14), the same method as that of Synthesis Example (1-1) was used, Synthesize each compound.

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Abstract

Disclosed is an organic electroluminescent element having a luminescent layer that comprises a host compound as a first component, a thermally-activated delayed fluorescence substance as a second component, and a boron-atom-containing compound as a third component, wherein the following relational formula is satisfied: (Excited singlet energy level determined from shoulder on peak short wavelength side of fluorescence spectrum of first component)>=(Excited singlet energy level determined from shoulder on peak short wavelength side of fluorescence spectrum of second component)>=(Excited singlet energy level determined from shoulder on peak short wavelength side of fluorescence spectrum of third component).

Description

technical field [0001] The present invention relates to an organic electroluminescent element comprising a host compound, a heat-activated delayed phosphor, and a compound having a boron atom, and a display device and an illuminating device including the organic electroluminescent element. In addition, the present invention relates to a composition and compound for forming a light-emitting layer of an organic electroluminescence device. Background technique [0002] Conventionally, a display device using a light-emitting element that performs electroluminescence has received various studies because it can realize power saving or thinning. Furthermore, an organic electroluminescence element (Electroluminescence, EL) element) is easy to achieve weight reduction or size upsizing, so it is actively researched. In particular, with regard to the development of organic materials having light-emitting properties such as blue, which is one of the three primary colors of light, and t...

Claims

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Application Information

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IPC IPC(8): H01L51/50C09K11/06G09F9/30H01L27/32
CPCC09K11/06G09F9/30H10K85/658H10K50/11C09K2211/188H10K85/631H10K85/654H10K85/657H10K85/6572H10K85/361
Inventor 畠山琢次近藤靖宏笹田康幸梁井元树
Owner KWANSEI GAKUIN EDUCATIONAL FOUND
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