Organic electroluminescent device

An electroluminescent element and luminescent technology, which is applied in the fields of electrical components, organic chemistry, and electric solid-state devices, can solve problems such as difficulty in reflecting deep blue, short life, and narrow luminescence spectrum.

Pending Publication Date: 2020-11-13
MATERIALS SCI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As the existing blue doping materials, fluorescent molecules such as Perylene, Coumarine, Anthracene, and Pyrene account for a large proportion, but the doping materials The half width (Full width half the maximum) of the luminescence spectrum is as wide as ~40nm, and it is difficult to reflect deep blue (Deep Blue). In the front light-emitting element, even if the predetermined wavelength range is amplified by optical resonance, optical loss will occur
[0006] In order to solve this problem, recently, boron-based doped materials with a narrow emission spectrum and high device efficiency are emerging. However, despite their high efficiency and excellent color performance, they are difficult to commercialize due to their short lifespan.
[0007] Therefore, the inventors of the present invention hope to improve the color purity of organic electroluminescent elements and solve the problem of shortened lifespan through an ideal combination of host material / dopant material while maintaining the excellent characteristics of the dopant material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1-1

[0137]

[0138] After dissolving 8.9 g (20 mmol) of starting material 1 in tert-butylbenzene (250 ml), it was cooled to 0°C. Under a nitrogen atmosphere, 24.7 ml (42 mmol) of a 1.7 M tert-butyllithium (tert-butyllithium) solution (in pentane) was added, followed by stirring at 60° C. for 2 hours.

[0139] The reaction was then cooled to 0 °C again, and 4.0 ml of BBr was added 3 (42 mmol) and stirred at room temperature for 0.5 hours. The reactant was cooled to 0° C., and 7.3 ml (42 mmol) of N,N-diisopropylethylamine (N,N-diisdopropylethylamine) was added, followed by stirring at 60° C. for 2 hours.

[0140] The reaction solution was cooled to room temperature, and the organic layer was extracted with ethyl acetate and water. After removing the solvent of the extracted organic layer, it purified by the silica gel column chromatography (DCM / hexane (Hexane)) method. Then, recrystallization and purification were performed using a DCM / acetone (Acetone) mixed solvent to obtain...

Synthetic example 1-2

[0143]

[0144] Except using 9.9 g (20 mmol) of starting material 1-3 instead of starting material 1-1, the experiment was carried out in the same manner as in Synthesis Example 1-1, and 2.16 g of the compound 1-1 was obtained with a yield of 23.0%. 3.

[0145] MS (MALDI-TOF) m / z: 470[M]+

Synthetic example 1-3

[0147]

[0148] Except using 10.6 g (20 mmol) of starting material 1-5 instead of starting material 1-1, the experiment was carried out in the same manner as in Synthesis Example 1-1, and 2.3 g of the compound 1-1 was obtained with a yield of 23.2%. 5.

[0149] MS (MALDI-TOF) m / z: 502[M]+

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PUM

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Abstract

The present invention relates to an organic electroluminescent device and, more specifically, to an organic electroluminescent device comprising, in one or more organic layers contained in the organicelectroluminescent device, novel boron-based organic compounds and anthracene-based organic compounds. The present invention may provide an organic electroluminescent device, which uses a host material having a specific structural formula despite having a high polarity, thereby preventing the deterioration of color characteristics and having characteristics such as long lifespan.

Description

technical field [0001] The present invention relates to an organic electroluminescent element, more specifically, to an organic electroluminescent element comprising a novel boron-based organic compound and anthracene in one or more organic layers included in the organic electroluminescent element. organic compounds. Background technique [0002] An organic electroluminescent element has a negative electrode (electron injection electrode) and a positive electrode (hole injection electrode) and has a structure including one or more organic layers between the two electrodes. [0003] At this time, the organic electroluminescent element starts from the positive electrode, and is divided into hole injection layer (hole injection layer, HIL), hole transport layer (hole transport layer, HTL), light emitting layer (light emitting layer, EML), electron transport layer (electron transport layer, ETL) or electron injection layer (electron injection layer, EIL) sequential stacking, in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/00H01L51/50
CPCC07F5/027H10K85/626H10K85/615H10K85/322H10K85/6576H10K85/6574H10K50/11H10K85/6572H10K50/15H10K50/16H10K50/18H10K50/171H10K85/658
Inventor 金成勋郑在皓姜炫彬金辰成郭兑虎
Owner MATERIALS SCI CORP
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