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Polymer, composition for organic electroluminescent element, organic electroluminescent element, organic el display device, and organic el lighting

A polymer, 6-membered ring technology, applied in the polymer field, can solve the problems of poor driving stability, has not yet reached a practical level, difficult to layer by wet film-forming methods, and achieves excellent durability, hole accumulation suppression, Excellent hole injection effect

Active Publication Date: 2018-05-29
MITSUBISHI RAYON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the wet film formation method is difficult to laminate, so compared with the device obtained by the vacuum evaporation method, the driving stability is poor, and the current situation is that it has not yet reached the practical level except for some

Method used

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  • Polymer, composition for organic electroluminescent element, organic electroluminescent element, organic el display device, and organic el lighting
  • Polymer, composition for organic electroluminescent element, organic electroluminescent element, organic el display device, and organic el lighting
  • Polymer, composition for organic electroluminescent element, organic electroluminescent element, organic el display device, and organic el lighting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0424] make out figure 1 The organic electroluminescence device shown.

[0425] After depositing an indium tin oxide (ITO) transparent conductive film on a glass substrate 1 by sputtering, a 2mm-wide stripe was patterned using a common photolithography technique and hydrochloric acid etching to form an anode 2 with a film thickness of 70nm. . After patterning, the ITO substrate is cleaned in the order of ultrasonic cleaning with aqueous surfactant solution, water washing with ultrapure water, ultrasonic cleaning with ultrapure water, and water washing with ultrapure water, then dried with compressed air, and finally UV ozone cleaning.

[0426] Next, prepare the arylamine polymer containing the following structural formula (P1), 4-isopropyl-4'-methyldiphenyliodonium tetrakis(pentafluorophenyl) boron represented by the structural formula (A1) A coating solution for forming a hole injection layer of acid salt and ethyl benzoate. This coating solution was formed into a film on...

Embodiment 2

[0469] For the hole transport layer 4, a coating solution for forming a hole transport layer containing a polymer 2 (P4) represented by the following structural formula was prepared, and formed on the hole injection layer 3 by spin coating under the following conditions. The film was heated to form a hole transport layer with a film thickness of 20 nm.

[0470]

[0471]

[0472] Solvent Cyclohexylbenzene

[0473] Coating solution concentration 1.5% by weight

[0474]

[0475]

[0476] For the light-emitting layer 5, a coating solution for forming a light-emitting layer containing compounds (H3) and (D2) represented by the following structural formulas was prepared, and a film was formed by spin coating under the following conditions, and heating was performed. On the layer 4, a light emitting layer with a film thickness of 41 nm was formed.

[0477] Except for this, an organic electroluminescent element was produced in the same manner as in Example 1. Table 10 sho...

Embodiment 3

[0500] The hole mobility of polymer 3 (P6) was measured using the time-of-flight (TOF) method in the same manner as the method described in JP-A-2014-51667.

[0501]

[0502] First, an ITO transparent conductive film (ITO stripes) was deposited on a glass substrate with a thickness of 70 nm, and the resulting substrate (manufactured by GEOMATEC) was subjected to ultrasonic cleaning with an aqueous surfactant solution, water washing with ultrapure water, ultrapure water After cleaning in the order of ultrasonic cleaning with pure water and water washing with ultrapure water, drying with compressed air was performed, and ultraviolet ozone cleaning was performed thereafter.

[0503] Dissolve (P6) at a concentration of 10% by mass in a solvent of toluene and silicone oil (manufactured by Shin-Etsu Silicones: KF-96) to prepare a solution, and spin coating on the cleaned substrate. film forming. It should be noted that all film formation was performed in a nitrogen atmosphere. ...

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Abstract

A polymer having a repeating unit represented by the following formula (1). In the formula, Ar1, Ar2 and Ar3 each independently represent an aromatic hydrocarbon group or an aromatic heterocyclic group which may have a substituent, and n represents an integer of 4 or more. Two or more of the aforementioned aromatic hydrocarbon groups and aromatic heterocyclic groups may be linked together directly or through linking groups.

Description

technical field [0001] The present invention relates to a polymer, in particular to a polymer useful as a hole injection layer and a hole transport layer of an organic electroluminescent element, a composition for an organic electroluminescent element containing the polymer, and an organic electroluminescent element having the polymer. Organic EL display and organic EL lighting of light-emitting elements. Background technique [0002] As a method for forming an organic layer in an organic electroluminescence element, a vacuum vapor deposition method and a wet film-forming method are mentioned. Vacuum deposition is easy to layer, and thus has the advantages of improving the injection of charges from the anode and / or cathode and confining excitons in the light-emitting layer. On the other hand, the wet film forming method does not require a vacuum process and is easy to increase the area. By using a coating liquid that mixes various materials with various functions, it is pos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/02H01L51/50
CPCC08G73/0266H10K71/12H10K85/111H10K85/151H10K50/15H10K50/17
Inventor 饭田宏一朗李延军梅基友和
Owner MITSUBISHI RAYON CO LTD
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