EP1996975A1 - Composant électrochrome - Google Patents

Composant électrochrome

Info

Publication number
EP1996975A1
EP1996975A1 EP07712513A EP07712513A EP1996975A1 EP 1996975 A1 EP1996975 A1 EP 1996975A1 EP 07712513 A EP07712513 A EP 07712513A EP 07712513 A EP07712513 A EP 07712513A EP 1996975 A1 EP1996975 A1 EP 1996975A1
Authority
EP
European Patent Office
Prior art keywords
electrochromic
active layer
component according
glass
layer
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Withdrawn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
EP07712513A
Other languages
German (de)
English (en)
Inventor
Andreas Kanitz
Wolfgang Roth
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.)
Siemens AG
Original Assignee
Siemens AG
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
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1996975A1 publication Critical patent/EP1996975A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on an electrochromic effect
    • G02F1/153—Constructional details
    • G02F1/1533—Constructional details structural features not otherwise provided for
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on an electrochromic effect
    • G02F1/1503—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on an electrochromic effect caused by oxidation-reduction reactions in organic liquid solutions, e.g. viologen solutions

Definitions

  • the invention relates to an electrochromic device having verbes ⁇ serter mass production capability.
  • Electrochromic Displays be based on organic materials ⁇ are normally composed of a layer of specific composition of which is located between electrodes arranged perpendicular to each other.
  • Essential components of the active layer are a redox system and a pH-active dye.
  • a voltage is applied to the system, the shift in the equilibrium of the redox partners on the two electrodes is in the opposite direction.
  • the pH of one of the electrodes rises while it sinks on the counter electrode.
  • Via a pH dye the change in pH is then converted into a color change.
  • a disadvantage of the known electrochromically active formulations relates to the manufacturing process of components. Since the ⁇ be known formulations are highly viscous and / or pasty, they remain after the application on the surface wet and / or sticky. Therefore, the production is great
  • the object of the present invention is therefore to provide an electrochromic component which has no tacky and / or moist surfaces during processing and is therefore processable for mass production, ie in automated processes, such as a roll-to-roll process, to an electrochromic process Component is processable.
  • the invention relates to an electrochromic device to a minimum ⁇ electrochromically active layer between two Elect ⁇ roden comprising, wherein the surface of the electrochromic acti ⁇ ven layer is dry.
  • the surface of the electrochromically active layer forms a thinnest glass layer, in particular a layer of an organic glass.
  • the organic solvents in egg ⁇ nem is soluble to give a transparent, dry polymer film remains on a substrate after evaporation of the solvent.
  • Particularly suitable polymers are polycarbonate and polymethyl methacrylate.
  • Methyl ⁇ lenchlorid a suitable solvent.
  • higher boiling solvents such as.
  • methyl ethyl ketone used.
  • the viscosity of the organic glasses can be adjusted within wide limits.
  • the TiO 2 commonly used as a white pigment for the production of electrochromic formulations can be dispersed very well.
  • an electrochromic active component which is also soluble in the solvent for the polymer may be mixed. Under corresponding conditions such formulation shows a suffi ⁇ accordingly storage stability. If, after the application of a sol ⁇ chen formulation, however, the solvent is evaporated on respective substrates, there remains an electrochromic ak ⁇ tive layer having a nontacky surface. In order to obtain a tack-free surface, if necessary, only partial evaporation of the solvent is sufficient.
  • the heat source used is advantageously an IR radiator.
  • a suspension of electrically conductive particles in a solvent e.g., a graphite suspension ( "carbon black") can be applied as a counter electrode.
  • the application can, for example, take place from solution with ⁇ means of screen printing. Due to the non-tacky surface can be used as counter electrode but also a metal be evaporated under appropriate conditions from the gas phase . Both the screen printing and the evaporation process can be carried over or restructured. This makes complex lithographic processes, the z. B. for making constructive ⁇ tured ITO electrodes for use in displays neces- agile are.
  • the figure shows a baking electrode 1, on which a layer 2 with electrochromically active material, for example, the formulation with the organic glass on the surface, is located. Above the layer with electrochromic active material is the counter electrode 3.
  • a layer 2 with electrochromically active material for example, the formulation with the organic glass on the surface
  • the paste-like formulation obtained is applied in the prior art to an ITO-coated glass or flexible Kunststoffsubstrate. After the drying of the layer on a hotplate at 7O 0 C is applied as a counter electrode "Carbon Black”. On applying a voltage between the electrodes, a color change is observed. In the connected state, the electrochromic cell is blue.
  • the invention relates to an electrochromic device having verbes ⁇ serter mass production capability.
  • the mass production capability is achieved by a dry surface of the electrochromic active layer already during the manufacturing process.

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Abstract

Composant électrochrome présentant une capacité améliorée de production de masse qui est obtenue déjà lors du processus de fabrication par le fait que la couche à activité électrochrome possède une surface sèche.
EP07712513A 2006-03-23 2007-03-13 Composant électrochrome Withdrawn EP1996975A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006013499 2006-03-23
PCT/EP2007/052338 WO2007107480A1 (fr) 2006-03-23 2007-03-13 Composant électrochrome

Publications (1)

Publication Number Publication Date
EP1996975A1 true EP1996975A1 (fr) 2008-12-03

Family

ID=38134791

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07712513A Withdrawn EP1996975A1 (fr) 2006-03-23 2007-03-13 Composant électrochrome

Country Status (2)

Country Link
EP (1) EP1996975A1 (fr)
WO (1) WO2007107480A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54119942A (en) * 1978-03-10 1979-09-18 Toshiba Corp Manufacture of electrochromic display element
US4938571A (en) * 1987-06-18 1990-07-03 Cogan Stuart F Solid state electrochromic light modulator
US5679283A (en) * 1994-07-22 1997-10-21 Gentex Corporation Electrochromic layer and devices comprising same
DE19810932A1 (de) * 1998-03-13 1999-09-16 Bayer Ag Elektrochrome Anordnung auf Basis von Poly-(3,4-ethylendioxy-thiophen)-Derivaten
US6501587B1 (en) * 2000-09-27 2002-12-31 Board Of Regents, The University Of Texas System Method of creating color-changing displays

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007107480A1 *

Also Published As

Publication number Publication date
WO2007107480A1 (fr) 2007-09-27

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