EP2001971A1 - Formulation electrochrome et composant electrochrome commutable - Google Patents

Formulation electrochrome et composant electrochrome commutable

Info

Publication number
EP2001971A1
EP2001971A1 EP07727456A EP07727456A EP2001971A1 EP 2001971 A1 EP2001971 A1 EP 2001971A1 EP 07727456 A EP07727456 A EP 07727456A EP 07727456 A EP07727456 A EP 07727456A EP 2001971 A1 EP2001971 A1 EP 2001971A1
Authority
EP
European Patent Office
Prior art keywords
electrochromic
formulation
component
formulation according
voltage
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Withdrawn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
EP07727456A
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 EP2001971A1 publication Critical patent/EP2001971A1/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Withdrawn legal-status Critical Current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
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K9/00—Tenebrescent materials, i.e. materials for which the range of wavelengths for energy absorption is changed as a result of excitation by some form of energy
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K9/00—Tenebrescent materials, i.e. materials for which the range of wavelengths for energy absorption is changed as a result of excitation by some form of energy
    • C09K9/02—Organic tenebrescent materials

Definitions

  • Electrochromic formulation electrochromic switchable component
  • the invention relates to a formulation for a elektrochro ⁇ mes component particularly one that irreversibly or almost mistaken ⁇ is reversibly switchable. Moreover, the invention relates to an electrochromic component which is irreversibly switchable.
  • Electrochromic formulations for electrochromic devices form within the device at least one layer which is located between electrodes arranged perpendicular to one another.
  • Essential components of this formulation are a redox system and a pH-active dye.
  • Ver ⁇ shift the equilibrium of redox partners at the two electrodes 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.
  • From DE 10 2005 031 634.4 is a material for a formulation of a electrochromic active layer of an electronic device known to th a polymeric Festelektroly ⁇ , a supporting electrolyte, a redox system, a white pigment, a solvent and comprises a dye at least, wherein the functionalities of the solid polymer electrolyte, chromophore and conducting salt are present together as one component in the formulation.
  • the object of the invention is, therefore, an electrochromic Formu ⁇ -regulation to provide an electrochromic device for the active layer, which overcomes the disadvantages of the prior art over ⁇ and is suitable for visualizing a system state.
  • the invention relates to an electrochromic formulation for the active layer of an electrochromic component, wherein the color change produced by the application of voltage either remains intact or lasts for at least four hours in the de-energized state.
  • the invention also relates to the use of the formulation for electrochromic components such as, for example, electrochromic display elements, as well as electrochromic components which are irreversibly switchable or which contain a formulation of the subject matter of the invention.
  • the formulations change irreversibly from one color state to another when an electrical voltage is applied. Irreversible in this context means that the Umpo ⁇ the electrochromic cell len not the original color state again, or after hours again can be achieved.
  • the signal triggered by a sensor generates a color impression which is retained even in the currentless case.
  • such formulations consist of a white pigment such as titanium dioxide and a solvent.
  • the irreversibly reacting system is one that can not return to its original state due to a chemical reaction and / or thermodynamic or kinetic inhibition. Such reactions are known in chemistry, especially in analytical chemistry. However, these reactions usually proceed in an aqueous medium, often requiring a certain pH or pH range.
  • One embodiment of the formulation is based on the use of metal salts, preferably those from the series of transition metals.
  • the choice of the anion is not restricted be ⁇ .
  • the class of inorganic anions are those of the series of halides, of the class of organic anions, acetates are preferred.
  • the metal ions present in the formulation are reduced in the electrochromic cell at the cathode to elemental metal, resulting in a dark gray to black color impression as a result of the formed dispersively distributed metal. In the event of a colorless metal salt a particularly large ⁇ SSSR color contrast.
  • Me ⁇ metal salts can be used, in which case a color change be- see the corresponding color of the dissolved salt in the formulation and the color of the resulting metal dispersive, that is, a dark color impression is produced.
  • the metal atoms at the cathode which is now the anode, no longer oxidized to the ion, so that the dark color impression remains. Since the original anode has become the cathode after the polarity reversal, the color impression from bright to dark also takes place here.
  • Another embodiment of the invention is based on the oxidation of the iodine anion to elemental iodine at the anode. Since the iodine salt in the formulation is colorless in the dissolved state, the iodine formed at the anode produces a dark brown to black color impression. This can be enhanced by the presence of starch in the formulation. As iodine salts z. As from the series of Alkalime ⁇ metals, in particular potassium iodide suitable.
  • Another embodiment of the invention is based on the irreversible addition of bromine to fluorescein.
  • the bromine is formed by oxidation of bromide present in the formulation at the anode. This bromine is added to irreversibly Fluo ⁇ rescein whereby tetrabromo-fluorescein (Eosin) is formed. This results in an irreversible color change from yellow to red. As Bromsalze z.
  • As suitable from the series of alkali metals in particular potassium bromide.
  • Another embodiment is based on 4.4
  • Bipyridinium salts as are known from DE 10 2005 032 316.2. These switch reversibly in the electric field between two color impressions. However, this reversibility can be greatly delayed by a suitable matrix.
  • a suitable matrix is one of anhydrous glycerol or one containing anhydrous glycerol. This delays after a switching operation, the return of the electrochromic cell in the initial state by many hours. To obtain the desired color impression, therefore, only an occasional voltage pulse is necessary.
  • the figure shows a schematic structure of a elektrochro ⁇ men component, on a substrate 1 is the lower electrode 2, thereon the at least one active layer 3 and thereon the upper electrode 4.
  • the entire component is surrounded by a Verkap- be 5.
  • the pasty formulation obtained is applied according to the prior art between ITO-coated glass or flexible plastic ⁇ plastic substrates.
  • a voltage is applied between the electrodes, a color change to dark brown / black is observed at the cathode.
  • this color impression persists; it now also forms on the other electrode.
  • the dark color ⁇ remains impressive even exist when de-energized for weeks.
  • the resulting light brown, pasty formulation is applied according to the prior art between ITO-coated glass or flexible plastic substrates.
  • a voltage is applied between the electrodes, a color change to dark brown / black is observed at the cathode.
  • umpo ⁇ len the electrochromic cell this color impression remains, it now also arises at the other electrode.
  • the dark color impression persists for weeks even when de-energized.
  • the obtained white, pasty formulation is applied according to the prior art between ITO-coated glass or flexible plastic substrates.
  • a voltage is applied between the electrodes, a color change from white to dark blue is observed at the cathode.
  • this color impression persists for at least 8-100 hours.
  • a short voltage pulse after 8-1oh the color impression can be maintained over a long period of time.
  • the invention provides a formulation for an electrochromic component, or an electrochromic device is first provided by a one-time display realizable ⁇ bar. This is especially true for applications of display packaging of perishable goods, such as food or medicines, of high economic importance.
  • the invention relates to a formulation for a elektrochro- mes component specifically one that irreversibly or almost mistaken ⁇ is reversibly switchable. Moreover, the invention relates to the use of such a formulation and an electrochromic component which is irreversibly switchable.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Abstract

L'invention concerne une formulation pour un composant électrochrome et en particulier un composant commutable de manière irréversible ou presque irréversible. L'invention concerne en outre l'utilisation de cette formulation et un composant électrochrome commutable de manière irréversible.
EP07727456A 2006-03-31 2007-03-28 Formulation electrochrome et composant electrochrome commutable Withdrawn EP2001971A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006015056 2006-03-31
PCT/EP2007/052984 WO2007113190A1 (fr) 2006-03-31 2007-03-28 formulation électrochrome et composant électrochrome commutable

Publications (1)

Publication Number Publication Date
EP2001971A1 true EP2001971A1 (fr) 2008-12-17

Family

ID=38068310

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07727456A Withdrawn EP2001971A1 (fr) 2006-03-31 2007-03-28 Formulation electrochrome et composant electrochrome commutable

Country Status (2)

Country Link
EP (1) EP2001971A1 (fr)
WO (1) WO2007113190A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008024260B4 (de) * 2008-05-20 2010-04-15 Siemens Aktiengesellschaft Elektrochrome Formulierung und organisches elektrochrom schaltbares elektronisches Bauteil
DE102008024259A1 (de) 2008-05-20 2009-12-31 Siemens Aktiengesellschaft Elektrochrome Formulierung und Verfahren zur Herstellung einer elektrochromen Formulierung; Verwendung der Formulierung und organisches elektronisches elektrochromes Bauteil
DE102009055401A1 (de) * 2009-12-30 2011-07-07 Deutsche Post AG, 53113 Sensormodul zur Sollwertüberwachung einer Messgröße und zugehöriges Verfahren

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4538158A (en) * 1982-04-21 1985-08-27 Bernard Warszawski Electrosensitive media and recording process
JPH01297489A (ja) * 1988-05-25 1989-11-30 Japan Carlit Co Ltd:The 非可逆性電気化学的発色表示体
US6676021B1 (en) * 1999-04-14 2004-01-13 Power Paper Ltd. Authenticated cards
EP1412811A2 (fr) * 2001-03-19 2004-04-28 Aveso, Inc. Dispositif d'affichage electrochromique et compositions utilisees pour fabriquer de tels dispositifs

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007113190A1 *

Also Published As

Publication number Publication date
WO2007113190A1 (fr) 2007-10-11

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