Electropolymerization of enhanced electrochromic (EC) polymer film

• US 7,675,667 B2
• Filed: 10/16/2008
• Issued: 03/09/2010
• Est. Priority Date: 06/25/2001
• Status: Active Grant

• Current Assignee: University of Washington
• Original Assignee: University of Washington
• Inventors: Liu, Lu, Taya, Minoru, Xu, Chunye
• Primary Examiner(s): Stultz; Jessica T
• Application Number:
  US12/253,110
• Publication Number:
  US 20090052002A1
• Time in Patent Office: 509 Days
• Field of Search: 359/265, 359/273
• US Class Current: 359/265
• CPC Class Codes: C08G 61/123 derived from five-membered heterocyclic compounds
• CPC Class Codes: C08G 61/124 with a five-membered ring containing one nitrogen atom in the ring
• CPC Class Codes: C08G 61/126 with a five-membered ring containing one sulfur atom in the ring
• CPC Class Codes: C09K 2211/1029 containing one nitrogen atom as the heteroatom
• CPC Class Codes: C09K 2211/1096 containing other heteroatoms
• CPC Class Codes: C09K 2211/1458 containing sulfur as the only heteroatom
• CPC Class Codes: C09K 2211/1466 containing nitrogen as the only heteroatom
• CPC Class Codes: C09K 2211/1491 containing other combinations of heteroatoms
• CPC Class Codes: C09K 9/02 Organic tenebrescent materials
• CPC Class Codes: G01N 21/553 and using surface plasmons fluorescence excitation G01N21/648; enhanced Raman G01N21/658
• CPC Class Codes: G02F 1/15165 Polymers
• CPC Class Codes: G02F 1/155 Electrodes
• CPC Class Codes: G02F 2001/1555 Counter electrode

Abstract

Devices including EC monomers polymerized using chronoamperometry to deposit a very thin homogeneous layer followed by cyclic voltammetry to increase the density of the EC polymer film. Another aspect of the present invention is directed to specific web like configurations for a grid of conductive material deposited onto a transparent substrate. The web like configuration is based either on concentric circles, or on concentric ellipses. Yet another aspect of the present invention is directed to an imaging system including a digital window that is disposed between a prism and a patterned analytic layer.

Claims

1. A counter-electrode useful in an electrochromic device including a cathodic polymer layer comprising:

(a) a substantially transparent and substantially non-conductive substrate; and

(b) a generally non-transparent conductive material deposited onto the substrate in a generally concentric web-shaped pattern, such that less than an entire upper surface of the substrate is coated with the conductive material, and the generally concentric web-shaped pattern does not reduce a transmittance of the transparent non-conductive substrate by substantially more than about 25 percent, the generally concentric web-shaped pattern comprising a plurality of concentric elements radiating from a central point, and a plurality of spoke-like elements radiating from the central point.

2. The counter-electrode of claim 1, wherein the concentric elements are based on circles.

3. The counter-electrode of claim 1, wherein the concentric elements are based on ellipses.

4. A laminated electrochromic device comprising:

(a) a transparent electrode layer;

(b) a cathodic polymer layer comprising a relatively thin base layer generated using chronoamperometry, and a relatively thicker upper layer generated using cyclic voltammetry;

(c) an electrolyte layer comprising a solid electrolyte; and

(d) a counter electrode layer.

5. The laminated electrochromic device of claim 4, wherein the cathodic polymer layer comprises poly[3,3-dimethyl-3,4-dihydro-2H-thieno[3,4-b]-[1,4]dioxepine].

6. The laminated electrochromic device of claim 4, wherein the counter-electrode comprises:

(a) a substantially transparent and substantially non-conductive substrate; and

(b) a conductive material deposited onto the substrate in a generally web-shaped pattern, such that the generally web-shaped pattern does not reduce a transmittance of the transparent non-conductive substrate by substantially more than 25 percent.

7. The laminated electrochromic device of claim 6, wherein the generally web-shaped grid pattern is based on at least one of concentric ellipses and concentric circles.

8. The laminated electrochromic device of claim 6, wherein the conductive material comprises gold, further comprising a titanium-tungsten (TiW) layer disposed between the transparent electrode layer and the gold.

9. A surface plasmon resonance imaging system, comprising:

(a) a flow cell;

(b) a patterned analytic layer;

(c) a light source directing light to the analytic layer along a first path;

(d) a first optical element in the first path that polarizes the light;

(e) a prism disposed in the first light path between the first optical element and the analytic layer, such that light traveling along the first path passes through the prism;

(f) a digital window disposed between the prism and the analytic layer configured for selectively controlling whether light from the light source traveling along the first path reaches the analytic layer, without affecting the transmission of light from the light source through the prism, the digital window including a plurality of individually addressable pixels arranged in a grid format, each pixel being switchable between a transparent state and a non-transparent state by applying a voltage thereto, each pixel comprising a laminated electrochromic structure having a cathodic electrochromic polymer layer;

(g) a plurality of electrical conductors coupled to each pixel, such that a voltage can be individually selectively applied to each pixel;

(h) a power supply electrically coupled to said electrical conductors and said light source;

(i) a second optical element disposed along a second path, said second optical element focusing light traveling from said analytic layer and passing the light that is focused through said prism; and

(j) a detector disposed in the second path, said detector receiving light focused by the second optical element.

10. The surface plasmon resonance imaging system of claim 9, wherein each laminated electrochromic structure includes:

(a) a first layer comprising a transparent electrode;

(b) a second layer comprising a cathodic polymer layer including a relatively thin base layer generated using chronoamperometry, and a relatively thicker upper layer generated using cyclic voltammetry;

(c) a third layer comprising a solid electrolyte;

(d) a fourth layer comprising an anodic polymer layer including a relatively thin base layer generated using chronoamperometry, and a relatively thicker upper layer generated using cyclic voltammetry; and

(e) a fifth layer comprising a transparent electrode.

11. The surface plasmon resonance imaging system of claim 10, wherein the anodic polymer comprises poly[3,6-bis(2-(3,4ethylenedioxythiophene))-N-methylcarbazole].

12. The surface plasmon resonance imaging system of claim 10, wherein the cathodic polymer comprises poly[3,3-dimethyl-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine].

13. The surface plasmon resonance imaging system of claim 9, wherein each laminated electrochromic structure includes:

(a) a first layer comprising a transparent electrode;

(b) a second layer comprising a cathodic polymer layer including a relatively thin base layer generated using chronoamperometry, and a relatively thicker upper layer generated using cyclic voltammetry;

(c) a third layer comprising a solid electrolyte; and

(d) a fourth layer comprising a counter-electrode.

14. The surface plasmon resonance imaging system of claim 13, wherein the cathodic polymer comprises poly[3,3-dimethyl-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine].

15. The surface plasmon resonance imaging system of claim 13, wherein the counter-electrode comprises:

(a) a transparent non-conductive substrate; and

(b) a conductive material deposited on the non-conductive substrate in a substantially web-shaped pattern, configured such that the pattern does not reduce a transmittance of the transparent non-conductive substrate by more than about 25 percent.

16. The surface plasmon resonance imaging system of claim 15, wherein the generally web-shaped grid pattern includes at least one of concentric circles and concentric ellipses.