Tungsten oxide nanostructure thin films for electrochromic devices

Patent metadata

Field	Value
Publication number	US-11697275-B2
Application number	US-202016786900-A
Country	US
Kind code	B2
Filing date	Feb 10, 2020
Priority date	Jan 28, 2015
Publication date	Jul 11, 2023
Grant date	Jul 11, 2023

Abstract

A method of manufacturing a thin film is provided. The method includes providing a plurality of crystalline hexagonal tungsten trioxide particles, size-reducing the crystalline hexagonal tungsten trioxide particles by grinding to produce crystalline hexagonal tungsten trioxide nanostructures, and coating the crystalline hexagonal tungsten trioxide nanostructures onto a substrate to produce a thin film. An electrochromic multi-layer stack is also provided.

First claim

What is claimed is:

1. A method of manufacturing a thin film comprising:
providing a plurality of crystalline pyrochlore tungsten oxide particles;
size-reducing the crystalline pyrochlore tungsten oxide particles by grinding to produce crystalline pyrochlore tungsten oxide nanostructures; and
coating the crystalline pyrochlore tungsten oxide nanostructures onto a substrate to produce a thin film.

2. The method of claim 1 , wherein the crystalline pyrochlore tungsten oxide particles are produced via hydrothermal synthesis.

3. The method of claim 1 , wherein the thin film does not comprise a binder material.

4. The method of claim 1 , wherein the substrate comprises a material with a softening point less than 600° C.

5. The method of claim 1 , wherein the substrate comprises a material with a softening point less than 300° C.

6. The method of claim 1 , wherein the thin film is a layer in an electrochromic device.

7. The method of claim 1 , wherein the thin film is an electrochromic cathode layer in an electrochromic device.

8. The method of claim 1 , wherein the substrate comprises: an electrically conductive layer, and an outer substrate.

9. The method of claim 8 , wherein the electrically conductive layer is selected from a group consisting of: transparent conductive oxides, thin metallic coatings, networks of conductive nanoparticles conductive metal nitrides, and composite conductors.

10. The method of claim 8 , wherein the outer substrate is selected from a group consisting of: glass and plastic.

11. An electrochromic multi-layer stack comprising:
a thin film comprising crystalline pyrochlore tungsten oxide nanostructures;
an electrically conductive layer; and
an outer substrate,
wherein the thin film does not comprise a binder and wherein the thin film is an electrochromic cathode layer in an electrochromic device.

12. The electrochromic multi-layer stack of claim 11 , wherein the crystalline pyrochlore tungsten oxide nanostructures are produced via hydrothermal synthesis followed by size reduction via grinding.

13. The electrochromic multi-layer stack of claim 11 , wherein the transparent substrate comprises a material with a softening point less than 600° C.

14. The electrochromic multi-layer stack of claim 11 , wherein the multi-layer stack is incorporated into an electrochromic device.

15. The electrochromic multi-layer stack of claim 11 , wherein the electrically conductive layer is selected from the group consisting of: transparent conductive oxides, thin metallic coatings, networks of conductive nanoparticles conductive metal nitrides, and composite conductors.

16. The electrochromic multi-layer stack of claim 11 , wherein the outer substrate is selected from the group consisting of: glass and plastic.

Assignees

• Kinestral Tech Inc
• Halio Inc

Inventors

• Roudebush John H
• Zhu Lina
• Giaquinta Daniel
• Duncan Hugues
• Turner Howard

Classifications

• B32B2307/412

  Transparent · CPC title

• B32B2255/205

  Metallic coating · CPC title

• B32B27/281

  comprising polyimides · CPC title

• B32B2605/006

  Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings · CPC title

• B32B27/40

  comprising polyurethanes · CPC title