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Polymer, coating composition comprising same, and organic light emitting device using same

A polymer, integer technology, applied in the field of polymers, can solve the problems of changing the concentration gradient of the solution, the material cannot be dissolved well, and defective devices, etc., and achieve the effect of reducing the driving voltage, excellent solubility, and improving the service life characteristics.

Pending Publication Date: 2021-12-17
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the commercially available material used in the deposition method has good crystallinity, the material does not dissolve well in the solution, or even if the material forms a solution, its crystals are easy to form, it is very likely that the concentration gradient of the solution will increase with the storage time change, or form defective devices

Method used

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  • Polymer, coating composition comprising same, and organic light emitting device using same
  • Polymer, coating composition comprising same, and organic light emitting device using same
  • Polymer, coating composition comprising same, and organic light emitting device using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0383] According to another exemplary embodiment, the first electrode is a negative electrode and the second electrode is a positive electrode.

[0384] The organic light emitting device of the present invention can be stacked into the structures in the following examples.

[0385] (1) Positive electrode / hole transport layer / luminescent layer / negative electrode

[0386] (2) Positive electrode / hole injection layer / hole transport layer / light emitting layer / negative electrode

[0387] (3) Positive electrode / hole injection layer / hole buffer layer / hole transport layer / light-emitting layer / negative electrode

[0388] (4) Positive electrode / hole transport layer / luminescent layer / electron transport layer / negative electrode

[0389] (5) Positive electrode / hole transport layer / luminescent layer / electron transport layer / electron injection layer / negative electrode

[0390] (6) Positive electrode / hole injection layer / hole transport layer / light emitting layer / electron transport layer / neg...

Synthetic example 1

[0436] Synthesis Example 1: Preparation of Polymer Compound 1

[0437]

[0438] After monomer 1-a (1.0g, 1.17mmol), monomer 1-b (1.0g, 1.28mmol), and initiator 1-c (5.0mg, 0.015mmol) were put into a Schlenk flask and dissolved in toluene (5.0 ml), the freeze-vacuum-thaw process was repeated three times, and the resulting product was stirred at 120° C. for 7 hours. After the reaction was completed, a polymer was obtained by pouring the solution into methanol to produce a precipitate. After the polymer obtained by filtration was stored in a vacuum oven, remaining monomers were removed through an adsorption column (hexane:methyl chloride=5:5), and the polymer solution obtained by flowing toluene was evaporated. Thereafter, a precipitate was generated in methanol, which was filtered and then dried in a vacuum oven to obtain Polymer 1. Polymerization, molecular weight, and molecular weight distribution of the polymer were determined by 1H-NMR and GPC analysis.

[0439] imag...

Synthetic example 2

[0441] Synthesis Example 2: Preparation of Polymer Compound 2

[0442]

[0443] Polymer 2 was synthesized in the same manner as in Synthesis Example 1 except that 2.0 g (2.34 mmol) of Monomer 1-a and 1.0 g (1.28 mmol) of Monomer 1-b were used in Synthesis Example 1.

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Abstract

The present specification relates to a polymer comprising a unit represented by chemical formula 1 and a unit represented by chemical formula 2; a coating composition comprising the same; and an organic light emitting device formed using the same.

Description

technical field [0001] The present specification relates to polymers, coating compositions comprising the same, and organic light emitting devices formed by using the same. [0002] This application claims priority and benefit from Korean Patent Application No. 10-2019-0077757 filed with the Korean Intellectual Property Office on June 28, 2019, the entire contents of which are incorporated herein by reference. Background technique [0003] The phenomenon of organic luminescence is one of the instances where electrical current is converted into visible light by internal processes of specific organic molecules. The principle of the organic light emitting phenomenon is as follows. When an organic material layer is disposed between an anode and a cathode, if an electric current is applied between the two electrodes, electrons and holes are respectively injected from the cathode and the anode into the organic material layer. The electrons and holes injected into the organic mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/32C09D125/18H01L51/50H01L51/54H10K99/00
CPCC08F212/32C09D125/18H10K85/111H10K85/151H10K50/15H10K50/00C08F2438/02C08F212/26H10K85/141C08F212/08H10K50/17
Inventor 林秉润裴在顺李载澈金睿䭱姜范求
Owner LG CHEM LTD
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