EP1458822A2 - Revetement particulaire - Google Patents

Revetement particulaire

Info

Publication number
EP1458822A2
EP1458822A2 EP02758292A EP02758292A EP1458822A2 EP 1458822 A2 EP1458822 A2 EP 1458822A2 EP 02758292 A EP02758292 A EP 02758292A EP 02758292 A EP02758292 A EP 02758292A EP 1458822 A2 EP1458822 A2 EP 1458822A2
Authority
EP
European Patent Office
Prior art keywords
particles
coating
percent
ito
coating according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP02758292A
Other languages
German (de)
English (en)
Inventor
Detlef Burgard
Rüdiger Nass
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Air Products and Chemicals Inc
Original Assignee
Nanogate Technologies GmbH
Nanogate Advanced Materials GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE10131494A external-priority patent/DE10131494A1/de
Application filed by Nanogate Technologies GmbH, Nanogate Advanced Materials GmbH filed Critical Nanogate Technologies GmbH
Publication of EP1458822A2 publication Critical patent/EP1458822A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/24—Electrically-conducting paints
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H10K50/81—Anodes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
    • H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
    • H10H20/80—Constructional details
    • H10H20/83—Electrodes
    • H10H20/832—Electrodes characterised by their material
    • H10H20/833—Transparent materials
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
    • H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
    • H10H20/80—Constructional details
    • H10H20/84—Coatings, e.g. passivation layers or antireflective coatings
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301—Details of OLEDs
    • H10K2102/331—Nanoparticles used in non-emissive layers, e.g. in packaging layer

Definitions

  • the present invention relates to the preambles of the independent claims and thus deals with how predetermined electrical and / or optical properties of coatings can be achieved.
  • ITO indium tin oxide
  • One problem with conventional ITO layers is that the conductivity of the layers is typically poorer than desired.
  • An object of the present invention is to provide something new for commercial use.
  • a first essential aspect of the present invention thus consists in providing a coating with predetermined electrical and / or optical properties, which is built up by particles, in which at least 10% of the particles have a size above 10 nm and at least 20 % of the particles are smaller than 50 nm.
  • substantial amounts of the particles lie in a range around or between 10 nanometers and 40 nm; a particularly good conductive coating is obtained when 30%. the particles have a size around 10 nm and 70% of the particles have a size around 40 nm.
  • a large part of the particles consists of those with a size in the range of 25 + - 5 nm. It has been found that a particularly good conductivity is also obtained with this size distribution.
  • the coating is preferably made of.
  • Indium tin oxide particles exist because ITO; represents a particularly preferred transparent, conductive oxide. To further increase the conductivity, these can be increased with a Dopants can be added, in particular with silver and / or titanium.
  • Protection is also claimed for a coating composition in which the particles have a size distribution as is required to produce a coating according to the invention.
  • a coating composition with such a size distribution can be obtained by first starting from the very small particles, as can be obtained in an easily redispersible form according to the known prior art.
  • the particles produced in this way typically have a size of around 10 nm without aftertreatment.
  • the typical size of these particles can be increased by heat treatment at different temperatures or for a different duration until the particles have grown.
  • particles enlarged in this way remain readily redispersible without the formation of twins or the like.
  • a multimodal size distribution for example with 30% particles around or smaller than 10 nm and 70% particles around or larger than 40 nm is desired, this can be achieved by simple mixing of different temperature-treated particles.
  • the coating composition with an organic solvent without impairing and / or adversely affecting the desired positive properties.
  • IPE isopropoxyethanol
  • BGA butyl glycol acetate
  • EG ethylene glycol
  • BCA butyl carbitol acetate
  • the coating composition can be used to produce a coating by first applying the particles with the fluid carrier, in particular by spin coating, the fluid carrier being removed, in particular by evaporation, and then heating the layer obtained to a temperature below 800 ° C.
  • the temperature to which it is heated will also be well below 800 ° C, for example around 200 ° C. This makes it possible in particular to coat polymer materials and the like with the coating composition according to the invention without the coated polymer object being destroyed. This is especially true when the surface is primarily heated, as is known per se in the art.
  • OLED organic light-emitting devices
  • the OLEDs produced according to the invention have significant advantages over OLEDs which are built up with conventionally sputtered ITO layers.
  • One reason for this may be that with conventional ITO layers that are sputtered, peaks appear in the ITO surface that can penetrate or not completely penetrate through the very thin, often monomolecular layers that form the OLED substances are covered and then lead to short circuits with a covering, additional ITO layer.
  • a structure according to the invention has such a smooth surface that penetration of a very thin layer of OLED material by existing ITO tips is practically completely ruled out, so that there are no short circuits between the one below an OLED layer and the one above the OLED.
  • Layer arranged ITO layer are to be feared.
  • the layer flatness is a particular advantage of the present invention.
  • organic substances which are common as organic binders. It is preferred if these organic substances are free of alkali or alkaline earth metal and / or at least no sub- has substantial proportions of the conductivity of the ITO or other ' layer-reducing ionic components. It should also be pointed out that an unexpected, particular advantage of the invention is that the layers obtained are not only highly conductive, especially when an organic binder is used, but also against peeling or peeling with adhesive strips or the like in particular are resistant.
  • the layers can be applied to a suitable carrier, in particular a flexible polymer, and / or that the layers can be provided with a corresponding protective cover and / or other elements which are required in order to produce a fully functional device such as desired to educate ..
  • Figure 1 shows the crystallite size as a function of the calcination temperature
  • FIG. 2 shows a typical particle size distribution for a calcined Ito powder
  • FIG. 3 specific resistance values of an Ito-
  • FIG. 4 top views and sectional views of a raster electron micro-examined ITO-
  • ITO powder is first produced in a conventional manner, as described, for example, in DE 100 44 214 AI. This powder is made without doping silver, titanium or the like. It has a particle size around 10 nm.
  • parts of the particles are heat-treated at different calcination temperatures. There is an increase in the particle size as a result of the heat treatment, as is shown by way of example in FIG. 1.
  • the particle size can be determined using conventional methods, for example using a Lecotrac LTU-150 Ultra-fine Particle Size Analyzer (UPA). A typical spectrum after heat treatment is shown in FIG. 2.
  • UPA Ultra-fine Particle Size Analyzer
  • the powders obtained are processed in a three-roll mill, together with a solvent and methoxyethoxyethoxyacetic acid (MEEE).
  • MEEE methoxyethoxyethoxyacetic acid
  • One of the substances IPE, BGA, - EG, BCA is used as solvent.
  • the solutions obtained are applied to borosilicate glass supports by spin coating at 1500 rpm for 15 seconds, these are heated in air at 500 ° C., cooled to room temperature and then at 300 ° C. in a reducing atmosphere in 10% H2 and 90% 2 reheated.
  • ITO coatings with a Obtained thickness of 800 nm.
  • the resistance values are then determined using a 4-point measurement.
  • Coatings are then examined which contain different proportions by weight of ITO particles with a typical size of 10 nm or a typical size of 40 nm. A minimum of the spec. Obtained resistance in the range of a weight fraction of 30% of ITO particles with a size of 10 nm. This is shown in FIG. 3.
  • the coating solutions obtained are applied in the same way and the coated supports are heated. Again, the specific resistance values are determined and no differences are found.
  • the layer, which is still warm, after the reduction, is arranged closely over a polymer plate made of PVC and brought to cool over it.
  • the development over time of the resistance value is compared with that which is obtained directly in the air when it cools down. It is found that the coating cooled over a PVC plate has a surprisingly improved aging behavior.
  • the experiments are repeated with polycarbonate sheets and polypropylene sheets and it is shown that improved aging behavior also results. This is attributed to the sealing of capillaries or the like by organic substances from the polymer plates.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Paints Or Removers (AREA)

Abstract

L'invention concerne un revêtement présentant des propriétés électriques et/ou optiques déterminées, ce revêtement étant constitué de particules. Selon l'invention, au moins 10 % des particules présentent une taille supérieure à 10 nm et au moins 20 % des particules mesurent moins de 50 nm.
EP02758292A 2001-07-02 2002-07-02 Revetement particulaire Withdrawn EP1458822A2 (fr)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
DE10131494A DE10131494A1 (de) 2001-07-02 2001-07-02 Partikuläre Beschichtung
DE10131494 2001-07-02
DE10203545 2002-01-29
DE10203545 2002-01-29
DE10205906 2002-02-13
DE10205906 2002-02-13
PCT/EP2002/007267 WO2003004571A2 (fr) 2001-07-02 2002-07-02 Revetement particulaire

Publications (1)

Publication Number Publication Date
EP1458822A2 true EP1458822A2 (fr) 2004-09-22

Family

ID=27214492

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02758292A Withdrawn EP1458822A2 (fr) 2001-07-02 2002-07-02 Revetement particulaire

Country Status (3)

Country Link
EP (1) EP1458822A2 (fr)
AU (1) AU2002325285A1 (fr)
WO (1) WO2003004571A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1701395B1 (fr) 2005-03-11 2012-09-12 Novaled AG Elément transparent émetteur de lumière
EP1895608A3 (fr) * 2006-09-04 2011-01-05 Novaled AG Composant organique émettant de la lumière et procédé de fabrication
DE102007013181B4 (de) 2007-03-20 2017-11-09 Evonik Degussa Gmbh Transparente, elektrisch leitfähige Schicht
DE202008005553U1 (de) 2008-04-22 2008-08-14 Evonik Degussa Gmbh Hochleitfähige, transparente Metalloxid-Schichten durch Plasmaimmersion
DE102008042694A1 (de) * 2008-10-09 2010-04-22 Evonik Degussa Gmbh UV Bestrahlung von Indium-Zinnoxid-Schichten

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100214428B1 (ko) * 1993-06-30 1999-08-02 후지무라 마사지카, 아키모토 유미 적외선차단재와 그것에 사용하는 적외선차단분말
US5763091A (en) * 1994-10-27 1998-06-09 Sumitomo Metal Mining Co., Ltd. Electroconductive substrate and method for forming the same
DE19625993A1 (de) * 1996-06-28 1998-01-02 Philips Patentverwaltung Organisches elektrolumineszentes Bauteil mit Ladungstransportschicht
US6486601B1 (en) * 1998-06-26 2002-11-26 Idemitsu Kosan Co., Ltd. Organic luminescence device with reduced leakage current
JP2000268969A (ja) * 1999-03-17 2000-09-29 Tdk Corp 有機ｅｌ素子
JP2000268973A (ja) * 1999-03-17 2000-09-29 Tdk Corp 有機ｅｌ素子
JP4543446B2 (ja) * 1999-04-05 2010-09-15 Ｔｄｋ株式会社 有機ｅｌ素子
TW533446B (en) * 2000-12-22 2003-05-21 Koninkl Philips Electronics Nv Electroluminescent device and a method of manufacturing thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03004571A3 *

Also Published As

Publication number Publication date
AU2002325285A1 (en) 2003-01-21
WO2003004571A3 (fr) 2004-06-24
WO2003004571A2 (fr) 2003-01-16

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