Polymer for organic electroluminescent element and organic electroluminescent element

A technology of electroluminescent components and polymers, applied in the direction of electroluminescent light sources, electrical components, electric light sources, etc., can solve the problems of insufficient efficiency and durability characteristics, and achieve high charge transfer characteristics, high driving stability, high performance effect

Pending Publication Date: 2020-11-06
NIPPON STEEL CHEM &MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, Patent Document 3 discloses a polymer having an indolocarbazole structure in a side chain, but the properties such as efficiency and durability of any device are not sufficient, and further improvement is required.

Method used

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  • Polymer for organic electroluminescent element and organic electroluminescent element
  • Polymer for organic electroluminescent element and organic electroluminescent element
  • Polymer for organic electroluminescent element and organic electroluminescent element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0145] Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited to these examples, and can be implemented in various forms as long as the gist thereof is not exceeded.

[0146] Molecular weight and molecular weight distribution determination of polymers

[0147] The molecular weight and molecular weight distribution of the synthesized polymer were measured using GPC (manufactured by Tosoh, HLC-8120GPC), solvent: tetrahydrofuran (THF), flow rate: 1.0 ml / min, column temperature: 40°C. The molecular weight of the polymer was calculated as a polystyrene-equivalent molecular weight using a calibration curve based on monodisperse polystyrene.

[0148] Solubility Evaluation of Polymers

[0149] The solubility of the synthesized polymer was evaluated according to the following method. It was mixed with toluene so as to have a concentration of 0.5 wt%, and ultrasonic treatment was performed at room temperature for...

Synthetic example 1

[0152] Synthesis of Polymer A via Intermediates A, B, Polymerization of Intermediates A, B.

[0153] (Synthesis of Intermediate A)

[0154]

[0155] Under a nitrogen atmosphere, 5.13g (20.0mmol) of 11,12-indolinone[2,3-a]carbazole, 7.97g (20.0mmol) of 9-(3-biphenyl)-3-bromocarbazole were added ), 6.36 g (100.1 mmol) of copper, 8.30 g (60.0 mmol) of potassium carbonate, 653.0 mg (0.2 mmol) of 18-crown ether, and 60 ml of dimethylimidazolinone were stirred. Then, it heated to 190 degreeC, and stirred for 48 hours. After cooling the reaction solution to room temperature, copper and inorganic substances were filtered off. 200 ml of a mixed solvent of water:ethanol=1:1 was added to the filtrate, stirred, and the precipitated solid was filtered out. After drying this under reduced pressure, it was purified by column chromatography to obtain 9.41 g (16.4 mmol, yield 82.0%) of intermediate A as a white powder.

[0156] (Synthesis of Intermediate B)

[0157]

[0158] Under a...

Synthetic example 2

[0165] Polymer B was synthesized via Intermediates C, D and Intermediates E, F, Polymerized Intermediates C, D.

[0166] (Synthesis of Intermediate C)

[0167]

[0168] Under a nitrogen atmosphere, 5.13 g (20.0 mmol) of 11,12-indolinone [3,2-a] carbazole, 6.19 g (20.0 mmol) of 3-bromo-terphenyl, and 0.11 g of copper iodide were added. g (0.60mmol), tripotassium phosphate 21.24g (100.1mmol), trans-1,2-cyclohexanediamine 0.91g (8.01mmol), 1,4-di 100ml of alkane was stirred. Then, it heated to 130 degreeC, and stirred for 48 hours. After cooling the reaction solution to room temperature, inorganic substances were filtered off. The filtrate was dried under reduced pressure, and purified by column chromatography to obtain 9.10 g (18.8 mmol, yield 93.8%) of intermediate C as a white powder.

[0169] (Synthesis of Intermediate D)

[0170]

[0171] Under a nitrogen atmosphere, add intermediate C4.85g (10.0mmol), 1,3-dibromo-5-iodobenzene 3.62g (10.0mmol), copper iodide 0.0...

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Abstract

Provided is a polymer for an organic electroluminescent element, the polymer having high light emission efficiency and high durability, and being applicable to a wet process. This organic electroluminescent element is obtained by laminating a positive electrode, an organic layer and negative electrode on a substrate, and is characterized in that a material containing a polymer for an organic electroluminescent element, the polymer having a polyphenylene main chain that has a five-ring condensed heterocyclic structure in a side chain, is used in at least one layer of the organic layer.

Description

technical field [0001] The present invention relates to a polymer for an organic electroluminescence element and an organic electroluminescence element (hereinafter referred to as an organic EL element). Materials for EL elements. Background technique [0002] In addition to the characteristics of high contrast, high-speed response, and low power consumption, organic EL also has the characteristics of thin, light, flexible structure, and design. In the fields of displays and lighting, Practical implementation is progressing rapidly. On the other hand, there is still room for improvement in aspects such as brightness, efficiency, lifespan, and cost, and various researches and developments on materials and device structures are being conducted. [0003] In order to maximize the characteristics of organic EL elements, it is necessary to recombine the holes and electrons generated from the electrodes without waste. A plurality of functional thin films that separate functions ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50C08G61/12H05B33/10
CPCH05B33/10C09K11/06C08G61/10C08G2261/12C08G2261/149C08G2261/148C08G2261/1414C08G2261/135C08G2261/312C08G2261/411C08G2261/64C08G2261/95C09D165/00C08G2261/3223C08G2261/1424C08G2261/794H10K85/111H10K85/151H10K85/6572H10K50/15C08G61/12H10K85/10H10K50/00C08G2261/124C08G2261/1646C08G2261/18C08G2261/228C09K2211/1425H10K50/11H10K50/16H10K50/17H10K50/18H10K50/19H10K50/171H10K2101/10
Inventor 林健太郎长浜拓男池永裕士
Owner NIPPON STEEL CHEM &MATERIAL CO LTD
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