Stable Electro-Chromic Device
First Claim
Patent Images
1. An electrochromic device having a first optical state and a second optical state, comprising:
- an electrolyte layer and an electrochromic layer having almost no potential between the layers when the electrochromic layer is in the first optical state; and
the electrolyte layer and the electrochromic layer having almost no potential between the layers when the electrochromic layer is in the second optical state.
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Abstract
A stable electrochromic stack is provided that is able to persistently hold a desired optical state. The stable electrochromic stack has at least two states. One state may be, for example, a bleached state in which light may readily pass, and the other state may be a colored state that distorts or interferes with the passage of light. Advantageously, the persistent electrochromic stack holds one or both of the optical states without the application of external power. The persistent time period may extend for days, weeks, or years depending on particular constructions, and on application requirements.
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Citations
71 Claims
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1. An electrochromic device having a first optical state and a second optical state, comprising:
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an electrolyte layer and an electrochromic layer having almost no potential between the layers when the electrochromic layer is in the first optical state; and
the electrolyte layer and the electrochromic layer having almost no potential between the layers when the electrochromic layer is in the second optical state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. An electrochromic device having a first optical state and a second optical state, comprising:
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an electrochromic layer;
an electrolyte layer adjacent the electrochromic layer;
a material positioned to react with the electrochromic layer; and
wherein the material is in a first stable state when the device is in the first optical state and the material is in a second stable state when the device is in the second optical state. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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53. A method of making an electrochromic device, comprising:
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depositing an electrolyte layer on a substrate;
depositing an electrochromic layer adjacent the electrolyte layer;
providing a pair of electrodes, one electrode connected to the electrolyte layer and the other electrode connected to the electrochromic layer; and
wherein the electrolyte layer and electrochromic layer have less than 0.3V potential between them when the electrochromic layer is fully bleached or fully colored. - View Dependent Claims (54, 55)
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56. A method of making an electrochromic device, comprising:
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depositing an electrolyte layer;
depositing an electrochromic layer adjacent the electrolyte layer;
providing a pair of electrodes, one electrode connected to the electrolyte layer and the other electrode connected to the electrochromic layer; and
wherein the electrolyte layer and electrochromic layer have less than 0.3V potential between them when the electrochromic layer is fully bleached or fully colored. - View Dependent Claims (57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71)
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Specification