Electrochromic element with improved electrolyte layer

US10268096B2 · kind B2 · utility

Assignees

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE
• Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

• Uwe Posset · Cadolzburg, DE
• Christine Joost · Leonberg, DE
• Marco Schott · Karlstadt, DE
• Jurgen Clade · Coburg, DE
• Christine Muller · Ochsenfurt, DE
• Matthias Beck · Munich, DE
• Martin Pinsker · Bruckberg, DE
• Tamas Gellert Bokor · Munich, DE
• Robert Meszaros · Munich, DE

Key dates

• Filing date: Mar 21, 2016
• Grant date: Apr 23, 2019
• Expiry date: Mar 21, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G02F2001/164
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The invention relates to an electrochromic element comprising two substrates having electrically conductive insides, a layered operating electrode which comprises a metal complex compound and which is capable of entering into a redox reaction where the transition from the oxidized to the reduced state is attended by an increase of color depth and the transition from the reduced to the oxidized state is attended by a corresponding weakening of color, an electrolyte layer in the form of a transparent, flexible film, and a counterelectrode[ATI(D1] which is capable of intercalating mobile cations of the electrolyte material and/or of entering into a redox reaction in which when the material of the second electrode changes from the oxidized to the reduced state it exhibits no increase of color depth in the wavelength region of the increase of color depth of the metal complex compound and preferably is not subject to any increase of color depth at all, where the electrolyte layer comprises at least the following components: (a) a crosslinkable hybrid prepolymer, (b) a crosslinkable organic monomer or prepolymer, (c) a non-crosslinkable, thermoplastic organic polymer, and a dissociable sa…