WO2015190727A1 - Composition d'encre polymère conductrice - Google Patents

Composition d'encre polymère conductrice Download PDF

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Publication number
WO2015190727A1
WO2015190727A1 PCT/KR2015/005395 KR2015005395W WO2015190727A1 WO 2015190727 A1 WO2015190727 A1 WO 2015190727A1 KR 2015005395 W KR2015005395 W KR 2015005395W WO 2015190727 A1 WO2015190727 A1 WO 2015190727A1
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Prior art keywords
ink composition
pedot
aqueous dispersion
pss
layer
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PCT/KR2015/005395
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English (en)
Korean (ko)
Inventor
김미경
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주식회사 엘지화학
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Priority claimed from KR1020150074616A external-priority patent/KR101679711B1/ko
Application filed by 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to CN201580030752.5A priority Critical patent/CN106459639B/zh
Priority to US15/318,318 priority patent/US10240057B2/en
Publication of WO2015190727A1 publication Critical patent/WO2015190727A1/fr

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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00Inks
    • C09D11/52Electrically conductive inks
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/06Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
    • H01B1/12Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances organic substances

Definitions

  • the present invention is to increase the pH of the ink composition to neutral while maintaining the dispersibility of the conductive polymer ink composition, more specifically, PEDOT: PSS (poly (3,4-ethylenedioxythiophene): poly (styrenesulfonate)) which is the main component of the ink composition
  • PEDOT PSS (poly (3,4-ethylenedioxythiophene): poly (styrenesulfonate)
  • the pH to a desired range, it is possible to solve problems such as shortening the life of the device due to strong acidity, and the transparent conductive polymer thin film manufactured by using the ink composition is a thin film prepared by the conventional method.
  • It relates to a pH-adjusted conductive polymer ink composition, characterized in that the haze (Haze) value can be lowered and the sheet resistance is low compared to the excellent conductivity.
  • PEDOT PSS (poly (3,4-ethylenedioxythiophene): poly (styrenesulfonate)) is highly applied to the optoelectronic organic device field because of its high electrical conductivity and transparency.
  • PEDOT PSS film can be applied to touch screens, organic light emitting diodes, and electronic papers. For this application, attempts have been made to increase conductivity by using dimethyl sulfoxide, sorbitol, ionic liquids and surfactants.
  • PEDOT: PSS is intended to be used as a hole transport layer for transparent electrodes, organic photovoltaics (OPV), organic light emitting diode (OLED), etc.
  • PEDOT: PSS has a strong acidity (pH 1 ⁇ 2).
  • pH 1 ⁇ 2 There is a problem that the life of the device is shortened, and the disadvantages such as corrosion of the equipment may appear.
  • an object of the present invention is to provide an ink composition excellent in conductivity that can increase the pH of the ink composition to neutral while maintaining the dispersibility of PEDOT: PSS, the main component of the ink composition. .
  • PEDOT poly (3,4-ethylenedioxythiophene): poly (styrenesulfonate)
  • PSS poly (3,4-ethylenedioxythiophene): poly (styrenesulfonate)
  • step b) phase-separating the mixed solution of step a) into an aqueous layer of a lower layer comprising a neutralized PEDOT: PSS aqueous dispersion and an organic layer of an upper layer comprising an amine compound and an organic solvent;
  • It provides a method for producing a neutralized PEDOT: PSS aqueous dispersion comprising a; d) washing with the addition of an organic solvent to the water layer from which the organic layer has been removed, and removing the organic layer to obtain a neutralized PEDOT: PSS aqueous dispersion.
  • the present invention provides a neutralized PEDOT: PSS aqueous dispersion, characterized in that prepared by the above production method.
  • the present invention provides a conductive polymer ink composition
  • a conductive polymer ink composition comprising 1) PEDOT: PSS aqueous dispersion neutralized by the preparation method, 2) dimethyl sulfoxide, 3) solvent and 4) surfactant.
  • the present invention provides a transparent electrode including a transparent conductive polymer thin film prepared using the ink composition.
  • the present invention provides an organic light emitting diode comprising a transparent conductive polymer thin film prepared using the ink composition as a buffer layer, an electrode layer or a hole transport layer.
  • the present invention also provides an organic solar cell including the transparent conductive polymer thin film manufactured using the ink composition as a buffer layer, an electrode layer or a hole transport layer.
  • the ink composition containing the neutralized PEDOT: PSS aqueous dispersion By using the ink composition containing the neutralized PEDOT: PSS aqueous dispersion according to the present invention, it is possible to increase the pH of the ink composition to neutral while maintaining the dispersibility of PEDOT: PSS, thereby controlling the pH to a desired level. Therefore, it is possible to solve problems such as shortening the life of the device or corrosion of equipment due to strong acidity. In addition, because of the scattering characteristics of light on the substrate, haze (Haze) value can be lowered and the sheet resistance value is also lowered, thereby forming a conductive polymer thin film having excellent conductivity.
  • haze (Haze) value can be lowered and the sheet resistance value is also lowered, thereby forming a conductive polymer thin film having excellent conductivity.
  • the transparent conductive polymer thin film prepared by using the ink composition according to the present invention has excellent conductivity, and can be used as a transparent electrode to replace ITO, and can be used as an electrode layer, a buffer layer, or a hole transport layer of an organic solar cell.
  • 1 is a view showing the step of separating the organic layer and the water layer in the method for producing a neutralized PEDOT: PSS aqueous dispersion of the present invention.
  • the present invention relates to a method for providing an ink composition having excellent conductivity capable of increasing the pH of an ink composition to neutrality while maintaining the dispersibility of PEDOT: PSS, which is a main component of the ink composition, and specifically, a neutralized PEDOT: PSS aqueous dispersion.
  • PEDOT poly (3,4-ethylenedioxythiophene): poly (styrenesulfonate)
  • PSS poly (3,4-ethylenedioxythiophene): poly (styrenesulfonate)
  • step b) phase-separating the mixed solution of step a) into an aqueous layer of a lower layer comprising a neutralized PEDOT: PSS aqueous dispersion and an organic layer of an upper layer comprising an amine compound and an organic solvent;
  • the PEDOT: PSS (poly (3,4-ethylenedioxythiophene): poly (styrenesulfonate)) aqueous dispersion is a polymer mixture composed of PEDOT and an ionomer called PSS, which is a charged macromolecular salt, that is, a conductive polymer material.
  • PSS poly(ethylenedioxythiophene): poly (styrenesulfonate)
  • aqueous dispersion is a polymer mixture composed of PEDOT and an ionomer called PSS, which is a charged macromolecular salt, that is, a conductive polymer material.
  • PSS is an acidic material
  • the lower electrode layer eg, ITO
  • the acidic hole transport layer composition is adjusted to neutral pH using a basic material, it is possible to prevent damage to the lower electrode layer, resulting in an effect of extending the life of the organic solar cell.
  • the pH of the PEDOT: PSS is adjusted to neutral by adding a basic solution, there may be a problem in that the dispersion of PEDOT: PSS is broken and a sharp drop in conductivity may appear. Therefore, the present inventors conducted a study on a method for increasing the pH to neutral without breaking the dispersion of PEDOT: PSS, and completed the present invention.
  • a strong basic substance such as ammonia water or sodium hydroxide (NaOH) may be directly added.
  • the amine compound which is a kind of basic substance can be added indirectly.
  • the addition method is to add the amine compound together with the organic solvent which is phase separated from water, so as not to directly affect the PEDOT: PSS layer.
  • the added amine compound may be at least one selected from the group consisting of a primary amine compound, a secondary amine compound, a tertiary amine compound and a pyridine compound, and specifically, the amine compound may be triethylamine.
  • 3,5-lutidine and 3,5-lutidine and 2,4,6-trimethylpyridine may be one or more selected from the group consisting of.
  • An organic solvent can be used.
  • the organic solvent may also be a single solvent or a mixed solvent.
  • diethyl ether may be used.
  • the organic solvent serves to physically separate the two layers.As a result, the amine compound is more soluble in the organic solvent than water, so that a large amount of the added amine compound stays in the organic layer, and the amine compound is present only at the interface between the organic layer and the water layer.
  • the amine compound may be dissolved in a small amount in water.
  • the content of the organic solvent of step a) may be 50 to 500 parts by weight based on 100 parts by weight of the PEDOT: PSS aqueous dispersion, and when the content of the organic solvent is in the above range, the concentration of the amine compound may be maintained at an appropriate level.
  • PEDOT neutralizes under conditions that do not impair the dispersibility of PPS. If the content of the organic solvent is less than the above-described range, the amine compound may directly affect the PEDOT: PSS layer to break up the dispersion, thereby causing a problem of low conductivity.
  • the concentration of the organic layer of the amine compound of step a) is preferably included to be 0.1 to 50% by weight.
  • the content of the amine compound is in the above range, it is possible to adjust the pH without affecting the dispersibility of PEDOT: PSS.
  • the mixing time of step a) is preferably 5 minutes to 24 hours, more preferably 30 minutes to 4 hours.
  • the mixing time can vary depending on the concentration.
  • the method of mixing the phase-separated water layer and the organic layer may be a method of physically mixing, a specific example may be mixed in a shaker, or by adding a magnetic bar, stirring using a vortex, etc. It is not limited to this.
  • the organic layer which is the upper layer, is removed, and the organic solvent is removed by adding an organic solvent to the water layer from which the organic layer is removed. A dispersion can be obtained.
  • PEDOT PSS aqueous dispersion
  • the content of the finally obtained PEDOT: PSS aqueous dispersion may be 70 to 90 parts by weight based on 100 parts by weight of the initially introduced PEDOT: PSS aqueous dispersion. .
  • the present invention provides a neutralized PEDOT: PSS aqueous dispersion, characterized in that produced by the above production method.
  • the neutralized PEDOT: PSS may be included in an amount of 0.001 to 3.0% by weight, and more preferably 0.01 to 1.0% by weight, based on the total weight of the aqueous dispersion.
  • the neutralized PEDOT: PSS aqueous dispersion prepared by the method of one embodiment of the present invention has a small amount of the amine compound in the PEDOT: PSS aqueous dispersion after neutralization, compared to the case where the amine compound is directly added to the ink composition, so that PEDOT: PSS Dispersibility can be maintained, and thus pH can be increased to neutral when prepared with the ink composition, so that the pH can be adjusted to a desired level.
  • the neutralized PEDOT: PSS aqueous dispersion according to the present invention is used as the ink composition, the haze value that appears hazy due to the light scattering characteristics of the substrate can be lowered. It is low and can exhibit an excellent effect of conductivity.
  • the present invention relates to a pH controlled conductive polymer ink composition, wherein the conductive polymer ink composition is 1) neutralized PEDOT: PSS (poly (3,4-ethylenedioxythiophene): poly ( styrenesulfonate)) aqueous dispersion, 2) dimethyl sulfoxide (DMSO), 3) solvent and 4) surfactant.
  • PEDOT poly (3,4-ethylenedioxythiophene): poly ( styrenesulfonate)
  • DMSO dimethyl sulfoxide
  • the neutralized PEDOT: PSS (poly (3,4-ethylenedioxythiophene): poly (styrene sulfonate)) aqueous dispersion means an aqueous dispersion solution containing a PEDOT: PSS polymer or copolymer, and is used in the present invention.
  • the PSS aqueous dispersion is characterized by using PEDOT: PSS aqueous dispersion which has undergone the above neutralization step.
  • the content of the PEDOT: PSS aqueous dispersion is preferably 10 to 60% by weight based on the total weight of the ink composition. If it is less than 10% by weight, the content of PEDOT: PSS is too low to secure sufficient conductivity. If it is more than 60% by weight, the spreadability is not good, and it is difficult to form a uniform thin film, and the jetting property is poor at ink jetting.
  • Heraeus PH-1000 was used as the PEDOT: PSS aqueous dispersion.
  • DMSO Dimethyl sulfoxide
  • the content is preferably 0.3 to 5.0% by weight relative to the total weight of the ink composition.
  • the amount is less than 0.3 wt%, the conductivity improvement effect is not observed.
  • the amount is more than 5.0 wt%, the conductivity of the ink is decreased and the stability is low.
  • the a) deionized water serves to disperse the PEDOT: PSS aqueous dispersion, the content of which is preferably 10 to 60% by weight based on the total weight of the ink composition. If the amount of deionized water exceeds 60% by weight relative to the total weight of the ink composition, the surface tension of the ink is high, so that the jetting is difficult to spread on the substrate and difficult to jet, and when the content is less than 10% by weight, it is not suitable as an inkjet ink. There is a problem.
  • the b) polyhydric alcohols may be diethylene glycol, ethylene glycol, propylene glycol, glycerol, sorbitol, and the like, but is not limited thereto.
  • propylene glycol or glycerol Preferably propylene glycol or glycerol.
  • the polyhydric alcohols are included in the solvent to improve the dispersibility and conductivity of the ink composition.
  • the content is preferably 1 to 45% by weight based on the total weight of the ink composition, when the content exceeds 45% by weight, the conductivity is rather reduced, and when the content is less than 1% by weight, the conductivity improvement effect does not appear.
  • the ink composition may further include other solvents to improve the process characteristics (jetting characteristics) and conductivity of the ink composition.
  • the other solvent may be an organic solvent butyl carbitol or triethyl phosphate, but is not limited thereto.
  • the content of the other solvent butyl carbitol or triethyl phosphate is preferably 1.0 to 40% by weight based on the total weight of the ink composition, when the content exceeds 40% by weight rather the fairness is reduced, less than 1.0% by weight fairness There is no improvement.
  • the surfactant is included to improve the spreadability of the ink composition, the content is preferably 0.01 to 3.0% by weight relative to the total weight of the ink composition. If it is less than 0.01% by weight, a desired level of spreadability may not be obtained. If it exceeds 3.0% by weight, the conductivity of the ink may appear.
  • the surfactant is preferably a fluorine-based surfactant as the nonionic surfactant, but is not limited thereto.
  • the pH of the conductive polymer ink composition is preferably 4.0 to 10.0, more preferably 5.0 to 8.0.
  • the pH of the ink composition can be adjusted to a desired range while maintaining the dispersibility of the ink composition, so that the lower electrode layer is damaged by strong acidity, which shortens the life of the device or corrodes the equipment. You can solve the problem.
  • the ink composition pH is less than 4.0, the acidity may cause high damage to the lower electrode layer, and when the pH exceeds 10.0, the hole transport layer may be impeded from transporting holes, thereby reducing energy conversion efficiency when used in an organic solar cell. .
  • PEDOT: PSS thin film on a substrate using the ink composition of the present invention As a method of forming a PEDOT: PSS thin film on a substrate using the ink composition of the present invention, slot die coating, bar coating, spin coating, inkjet printing are commonly used. printing), spray coating and the like can be used. Inkjet printing is preferred because of the advantage of being able to pattern directly where desired, using a small amount of material.
  • the transparent conductive polymer thin film by inkjet printing prepared using the ink composition of the present invention is excellent in the transmittance as well as the conductivity of the PEDOT: PSS thin film.
  • Another aspect of the invention provides a transparent electrode comprising a transparent conductive polymer thin film prepared using the ink composition.
  • OLED organic light emitting diode
  • the transparent conductive polymer thin film as a buffer layer, an electrode layer or a hole transport layer.
  • an organic solar cell including the transparent conductive polymer thin film as a buffer layer, an electrode layer or a hole transport layer.
  • PEDOT PSS aqueous solution PH-1000 (Heraeus)
  • diethyl ether diethyl ether
  • triethylamine triethylamine
  • the organic layer was removed after mixing for 2 hours to mix the water layer and the organic layer.
  • diethyl ether was added to wash the water layer and the organic layer was poured out. After repeating the process of washing the water layer 2 to 3 times was able to obtain a neutralized PEDOT: PSS aqueous dispersion.
  • the triamine which is an amine compound, in 4.2 g of the neutralized PEDOT: PSS aqueous solution thus obtained was measured to contain 0.017 g.
  • PSS aqueous dispersion solution 0.21 g of DMSO, 4.2 g of DI water, 2.52 g of propylene glycol, 1.68 g of butyl carbitol and 0.008 g of surfactant F-555 (DIC) were added, followed by stirring.
  • PSS ink compositions were prepared.
  • PEDOT: PSS ink composition was prepared in the same manner as in Example 1, except that 2,4,6-trimethylpyridine was added instead of triethylamine as an amine compound, of which neutralized PEDOT: PSS aqueous solution was 4.2g 2,4,6-trimethylpyridine was determined to contain 0.016g.
  • PEDOT PSS aqueous solution PH-1000 (Heraeus)
  • 0.2 g of ammonia water was added and stirred for 2 hours.
  • PEDOT 4 g of PH-1000 (Heraeus), an aqueous solution of PDS, 0.2 g of DMSO, 4 g of DI water, 2.4 g of propylene glycol, 1.6 g of butyl carbitol and surfactant F-555 (DIC)
  • PEDOT 4 g of PH-1000 (Heraeus), an aqueous solution of PDS, 0.2 g of DMSO, 4 g of DI water, 2.4 g of propylene glycol, 1.6 g of butyl carbitol and surfactant F-555 (DIC)
  • PEDOT: PSS ink composition After adding 0.006 g, it was stirred for 2 hours. Thereafter, 0.3 g of 3,5-diethylpyridine was further added and stirred to prepare a PEDOT: PSS ink composition.
  • Table 1 shows the amounts of amine compounds contained in the PEDOT: PSS aqueous dispersion neutralized in Examples 1 and 2 and Comparative Example 3, respectively.
  • the neutralized PEDOT: PSS aqueous dispersions of Examples 1 and 2 prepared by the method of the present invention as described below were compared to Comparative Example 3 in which the amine compound was added directly to the ink composition, and then neutralized in the PEDOT: PSS aqueous dispersion after neutralization.
  • the dispersibility of PEDOT: PSS can be maintained, and thus the pH can be increased to neutral when prepared with the ink composition, so that the pH can be adjusted to a desired level.
  • the haze value that appears hazy due to the light scattering characteristics of the substrate can be lowered. It is low and can exhibit an excellent effect of conductivity.
  • the thin film properties were evaluated through the transmittance and Haze measurement.
  • the ink compositions of Examples 1 and 2 according to the present invention were able to make the ink neutral without breaking the dispersion of PEDOT: PSS, and the thin film prepared using the same had low sheet resistance and high permeability, Because of the scattering properties of the light on the substrate, haze values that look hazy can be lowered.
  • the ink composition according to the present invention can adjust the pH of the ink composition to a desired level while maintaining the dispersibility of PEDOT: PSS, it is possible to produce an ink composition excellent in processability during the inkjet process, and transmittance and conductivity It was confirmed from the above results that an excellent and uniform transparent conductive polymer thin film can be prepared.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Conductive Materials (AREA)

Abstract

La présente invention porte sur une composition d'encre polymère conductrice et, plus précisément, sur une composition d'encre polymère conductrice à pH réglé, caractérisée en ce que le pH de la composition d'encre est réglable à une plage souhaitée par augmentation du pH de la composition d'encre au point neutre avec maintien simultanément de la dispersibilité de poly(3,4-éthylènedioxythiophène)/poly(styrènesulfonate) (PEDOT:PSS), qui est un composant principal de la composition d'encre, ce qui permet de résoudre des problèmes, tels que le raccourcissement de la durée de vie de dispositifs à cause d'un acide fort, et d'obtenir un film mince de polymère conducteur transparent fabriqué à l'aide de la composition d'encre ayant une valeur de trouble inférieure à celle de films minces fabriqués par des procédés existants et conservant une excellente conductivité électrique en raison d'une faible résistance de couche.
PCT/KR2015/005395 2014-06-13 2015-05-29 Composition d'encre polymère conductrice WO2015190727A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201580030752.5A CN106459639B (zh) 2014-06-13 2015-05-29 导电聚合墨水组合物
US15/318,318 US10240057B2 (en) 2014-06-13 2015-05-29 Conductive polymeric ink composition

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2014-0071829 2014-06-13
KR20140071829 2014-06-13
KR10-2015-0074616 2015-05-28
KR1020150074616A KR101679711B1 (ko) 2014-06-13 2015-05-28 중성화된 전도성 수분산액 조성물 및 그 제조방법

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017155362A1 (fr) * 2016-03-11 2017-09-14 주식회사 엘지화학 Photopile organique et son procédé de fabrication
CN114316685A (zh) * 2021-12-21 2022-04-12 江南大学 一种墨水直写3d打印pedot:pss复合水凝胶及其制备方法

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WO2010104349A2 (fr) * 2009-03-11 2010-09-16 Suh Kwang Suck Composés pouvant être utilisés en tant que matériaux pour former une couche d'injection à trous ou une couche de transport à trous, et diode électroluminescente organique constituée de ces composés
JP2011201933A (ja) * 2010-03-24 2011-10-13 Alps Electric Co Ltd 導電性インク、導電膜、及び高分子アクチュエータ素子、並びに、導電性インクの製造方法、及び高分子アクチュエータ素子の製造方法
KR20120006562A (ko) * 2009-05-01 2012-01-18 플렉스트로닉스, 인크 수성을 비수성 용매로 대체하는 방법
JP4999540B2 (ja) * 2007-05-15 2012-08-15 花王株式会社 インクジェット記録用水分散体の製造方法
KR20130038398A (ko) * 2007-08-29 2013-04-17 하.체.스타르크 클레비오스 게엠베하 잉크젯 인쇄 방식에 의한 전도성 코팅제의 제조방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4999540B2 (ja) * 2007-05-15 2012-08-15 花王株式会社 インクジェット記録用水分散体の製造方法
KR20130038398A (ko) * 2007-08-29 2013-04-17 하.체.스타르크 클레비오스 게엠베하 잉크젯 인쇄 방식에 의한 전도성 코팅제의 제조방법
WO2010104349A2 (fr) * 2009-03-11 2010-09-16 Suh Kwang Suck Composés pouvant être utilisés en tant que matériaux pour former une couche d'injection à trous ou une couche de transport à trous, et diode électroluminescente organique constituée de ces composés
KR20120006562A (ko) * 2009-05-01 2012-01-18 플렉스트로닉스, 인크 수성을 비수성 용매로 대체하는 방법
JP2011201933A (ja) * 2010-03-24 2011-10-13 Alps Electric Co Ltd 導電性インク、導電膜、及び高分子アクチュエータ素子、並びに、導電性インクの製造方法、及び高分子アクチュエータ素子の製造方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017155362A1 (fr) * 2016-03-11 2017-09-14 주식회사 엘지화학 Photopile organique et son procédé de fabrication
US10672985B2 (en) 2016-03-11 2020-06-02 Lg Chem, Ltd. Organic solar cell and method for manufacturing same
CN114316685A (zh) * 2021-12-21 2022-04-12 江南大学 一种墨水直写3d打印pedot:pss复合水凝胶及其制备方法

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