Electrochromic system

• US 20040056239A1
• Filed: 04/25/2003
• Published: 03/25/2004
• Est. Priority Date: 02/06/1997
• Status: Active Grant

• Current Assignee: Brendan Enright, Donald Fitzmaurice, Rachel Cinnsealach, Rao S. Nagaraja
• Original Assignee: Brendan Enright, Donald Fitzmaurice, Rachel Cinnsealach, Rao S. Nagaraja
• Inventors: Rao, S. Nagaraja, Cinnsealach, Rachel, Enright, Brendan, Fitzmaurice, Donald
• Granted Patent: US 6,755,993 B2
• Time in Patent Office: Days
• US Class Current: 252/583
• CPC Class Codes: C09K 9/02 Organic tenebrescent materials
• CPC Class Codes: G02F 1/1516 comprising organic material
• CPC Class Codes: Y10T 428/249978 Voids specified as micro
• CPC Class Codes: Y10T 428/31504 Composite [nonstructural laminate]

Abstract

A method for the manufacture of an electrochromic system using a nanoporous-nanocrystalline film comprising a semiconducting metallic oxide having a redox chromophore adsorbed thereto.

Claims

1. A method for the manufacture of an electrochromic system using a nanoporous-nanocrystalline film comprising a semiconducting metallic oxide having a redox chromophore adsorbed thereto, wherein the redox chromophore comprises a compound of the formula

7. The method of claim 1, wherein the metallic oxide of the nanoporous-nanocrystalline film is an oxide of a metal selected from titanium, zirconium, hafnium, chromium, molybdenum, tungsten, vanadium, niobium, tantalum, silver, zinc, strontium, iron (Fe²⁺ and Fe³⁺) and nickel and perovskites thereof, preferably TiO₂, WO₃, MoO₃, ZnO or SnO₂.

2. A method for the manufacture of an electrochromic system using a nanoporous-nanocrystalline film comprising a semiconducting metallic oxide having a redox chromophore adsorbed thereto, wherein the redox chromophore comprises a compound of the formula

8. The method of claim 2, wherein the metallic oxide of the nanoporous-nanocrystalline film is an oxide of a metal selected from titanium, zirconium, hafnium, chromium, molybdenum, tungsten, vanadium, niobium, tantalum, silver, zinc, strontium, iron (Fe²⁺ and Fe³⁺) and nickel and perovskites thereof, preferably TiO₂, WO₃, MoO₃, ZnO or SnO₂.

3. A method for the manufacture of an electrochromic system using a nanoporous-nanocrystalline film comprising a semiconducting metallic oxide having a redox chromophore adsorbed thereto, wherein the redox chromophore comprises a compound of the formula

4. The method of claim 3, wherein m is 1 or 2 and n is an integer of from 1 to 5.

5. The method of claim 3, wherein R₁ is

6. The method of claim 3, wherein m is 1 or 2 and n is an integer of from 1 to 5, and wherein R₁ is

9. The method of claim 3, wherein the metallic oxide of the nanoporous-nanocrystalline film is an oxide of a metal selected from titanium, zirconium, hafnium, chromium, molybdenum, tungsten, vanadium, niobium, tantalum, silver, zinc, strontium, iron (Fe²⁺ and Fe³⁺) and nickel and perovskites thereof, preferably TiO₂, WO₃, MoO₃, ZnO or SnO₂.