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Charge-transporting varnish

一种电荷传输性、电荷传输的技术，应用在电路、电气元件、导电涂料等方向，能够解决没有清漆等问题

Active Publication Date: 2014-11-12
NISSAN CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in the context of recent advances in the field of displays, such as the upsizing of image display devices, there has been an increasing demand for charge-transporting varnishes that are highly accurate, reproducible, and capable of forming a large-area film. There are no conventional varnishes that can sufficiently Varnishes meeting the above requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0149] The following examples and comparative examples are given to describe the present invention more specifically, but the present invention is not limited to the following examples. In addition, the apparatuses used in the examples are as follows.

[0150] (1) Viscosity

[0151] Device: TVE-22L viscometer manufactured by Toki Sangyo Co., Ltd.

[0152] Measuring temperature: set the constant temperature tank of the viscometer at 25°C for measurement

[0153] (2) surface tension

[0154] Device: Automatic surface tensiometer CBVP-Z manufactured by Kyowa Interface Science Co., Ltd.

[0155] Measurement temperature: measured at an ambient temperature of 23°C

[0156] (3) Film production

[0157] Equipment: Slot die coater T2 manufactured by Techno-machine Co., Ltd.

[0158] (4) Film thickness measurement

[0159] Device: Kosaka Laboratories Co., Ltd. Micro Shape Measuring Machine Surfcorder ET-4000

[0160] (5) Substrate washing

[0161] Equipment: Substrate cleaning ...

Synthetic example 1

[0163] [Synthesis Example 1] Synthesis of Aniline Derivatives

[0164] Based on the description of International Publication No. 2008 / 129947, the oligoaniline derivative represented by the formula (6) used in the examples was synthesized according to the following reaction formula (hereinafter abbreviated as BDPA-PTA). The obtained oligoaniline compound is carried out 1 The results of the H-NMR measurement are shown below.

[0165] 1 H-NMR (CDCl 3 ): δ7.83(S,2H), 7.68(S,1H), 7.26-7.20(m,8H), 7.01-6.89(m,28H)

[0166]

[0167] [2] Preparation of varnish and production and evaluation of film

Embodiment 1

[0169] Under a nitrogen atmosphere, the phenyltetraphenylamine shown in formula (5) (hereinafter referred to as PTA) 1.056g (2.385mmol) and naphthalene disulfonic acid oligomer (hereinafter referred to as NSO-2) 3.230g (3.578mmol) shown in formula (8) are completely dissolved in N,N-dimethyl Acetamide (hereinafter abbreviated as DMAc) 189g.

[0170] To the obtained solution, 21 g of 2,3-butanediol (hereinafter abbreviated as 2,3-BD) was added and stirred as a poor solvent to prepare a charge-transporting varnish (solid content: 2.0% by mass).

[0171] [chemical 9]

[0172]

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PUM

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Abstract

A charge-transporting thin film having excellent flatness can be obtained with good repeatability using the charge-transporting varnish of the present invention, which contains: a charge transportation substance comprising a charge-transporting monomer or a charge-transporting oligomer or polymer having a number-average molecular weight of 200-50,000, or a charge transporting material comprising the charge transportation substance and a dopant substance; and a mixed solvent including at least one type of good solvent and at least one type of poor solvent; the absolute value of the boiling point difference DeltaT°C of the good solvent and the poor solvent satisfying the relation |DeltaT| < 20°C; the viscosity at 25°C being 7.5 mPa.s or less; the surface tension at 23°C being 30.0-40.0 mN / m; and the charge-transporting material being dissolved or uniformly dispersed in the mixed solvent.

Description

technical field [0001] The present invention relates to a charge-transporting varnish, and more specifically, to a charge-transporting varnish capable of forming a thin film with good flatness. Background technique [0002] In an organic electroluminescent device (hereinafter simply referred to as an organic EL device), a charge-transporting thin film containing a charge-transporting oligomer and / or polymer is generally used as a charge injection layer, a charge transport layer, and a light-emitting layer. [0003] Such a charge transport thin film requires high flatness. This is considered to be because the unevenness of the charge transport thin film is related to the uneven light emission of the device, the reduction of the life of the device, the generation of black spots, and the reduction of device characteristics due to short circuits, etc., which will cause a decrease in the yield when producing organic EL devices. s reason. [0004] Therefore, there is a strong de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50C09D5/00C09D7/12C09D201/00H01B1/20H01B5/14H01B13/00
CPCC09D201/00C09D7/12H01L51/0059H01L51/5056C09D5/00H01L51/5088H10K71/15H10K85/631H10K50/15H10K50/17C09D179/02C08G73/0266C09D4/00C09D7/20C09D5/24C09D4/06H01B1/20H01B5/14H01B13/22
Inventor 竹田佳代吉本卓司
Owner NISSAN CHEM CORP
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