Metal-complex-based electrochromic device

Patent metadata

Field	Value
Publication number	US-2021109416-A1
Application number	US-201916981036-A
Country	US
Kind code	A1
Filing date	Mar 15, 2019
Priority date	Mar 16, 2018
Publication date	Apr 15, 2021
Grant date	—

Abstract

An object of the present invention is to provide a novel electrochromic device (ECD). Disclosed is an electrochromic device (ECD) comprising two metal-complex-based electrochromic thin films individually acting as a working electrode and a counter electrode; (i) one of the two metal-complex-based electrochromic thin films being a film of a cathodically coloring metallo-supramolecular polymer comprising at least one organic ligand having a plurality of metal coordination positions and a metal ion of at least one transition metal and/or lanthanoid metal with the at least one organic ligand and the metal ion being arranged alternately, and the other of the two metal-complex-based electrochromic thin films being a film of an anodically coloring metal hexacyanoferrate (MHCF) represented by the formula: M(II) 3 [Fe(III)CN 6 ] 2 (where M=Fe, Ni or Zn), and (ii) the electrochromic device having a first conducting substrate; the film of the cathodically coloring metallo-supramolecular polymer; an electrolyte; the film of the anodically coloring metal hexacyanoferrate (MHCF); and a second conducting substrate being arranged in this order.

First claim

1 . An electrochromic device (ECD) comprising two metal-complex-based electrochromic thin films individually acting as a working electrode and a counter electrode; (i) one of the two metal-complex-based electrochromic thin films being a film of a cathodically coloring metallo-supramolecular polymer comprising at least one organic ligand having a plurality of metal coordination positions and a metal ion of at least one transition metal and/or lanthanoid metal with the at least one organic ligand and the metal ion being arranged alternately, and the other of the two metal-complex-based electrochromic thin films being a film of an anodically coloring metal hexacyanoferrate (MHCF) represented by the formula: M(II) 3 [Fe(III)CN 6 ] 2 (where M is at least one selected from Fe, Ni, and Zn), and (ii) the electrochromic device having a configuration of a first conducting substrate; the film of the cathodically coloring metallo-supramolecular polymer; an electrolyte; the film of the anodically coloring metal hexacyanoferrate (MHCF); and a second conducting substrate being arranged in this order.

2 . The electrochromic device according to claim 1 , wherein the at least one organic ligand comprises an organic ligand having at least two selected from terpyridyl group, bipyridyl group, pyridyl group, phenanthrolyl group, acethylacetonato group and their derivatives.

3 . The electrochromic device according to claim 1 , wherein the at least one transition metal and/or lanthanoid metal comprises a metal selected from iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), ruthenium (Ru), rhodium (Rh), palladium (Pd), silver (Ag), osmium (Os), iridium (Ir), platinum (Pt), gold (Au), europium (Eu) and terbium (Tb).

4 . The electrochromic device according to claim 1 , wherein the at least one organic ligand comprises an organic ligand having a structure represented by at least one of the following formulae:

wherein R is a spacer comprising a carbon atom(s) and a hydrogen atom(s), or a spacer directly connecting two moieties independently selected from terpyridyl group, bipyridyl group, pyridyl group, phenanthrolyl group, acethylacetonato group; and R 1 , R 2 , R 3 and R 4 are each independently a hydrogen atom, an aryl group or an alkyl group.

5 . The electrochromic device according to claim 1 , wherein the at least one transition metal and/or lanthanoid metal comprises Fe; and the M of the formula: M(II) 3 [Fe(III)CN 6 ] 2 comprises Ni.

6 . The electrochromic device according to claim 1 , wherein the electrolyte is a liquid electrolyte or a solid-state electrolyte.

7 . The electrochromic device according to claim 1 , wherein the electrolyte is a solid-state electrolyte comprising acetonitrile, a poly(methyl methacrylate) (PMMA), propylene carbonate (PC), and MClO 4 (where M=Li or Na).

Assignees

• Nat Inst Materials Science
• Univ Nat Taiwan

Inventors

• Higuchi Masayoshi
• LU Hsin-Che
• Ho Kuo-Chuan

Classifications

• G02F2001/15025

  having an inorganic electrochromic layer and a second solid organic electrochromic layer · CPC title

• G02F1/155

  Electrodes · CPC title

• G02F1/1524 Primary

  Transition metal compounds · CPC title

• G02F1/15165

  Polymers · CPC title

• C09K2211/188

  of other metals not provided for in one of the previous groups · CPC title