Stable conjugated polymer electrochromic devices incorporating ionic liquids
First Claim
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1. A method for preparing an electroactive conjugated polymer which comprises the steps of:
- (a) immersing a pair of electrodes in an anhydrous ionic liquid which is stable in the presence of water containing the monomeric form of the conjugated polymer; and
(b) applying a voltage between the electrodes in the pair of electrodes until a desired quantity of conjugated polymer which is stable in the presence of the ionic liquid is deposited on one of the electrodes in the pair of electrodes.
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Abstract
Electrochemical synthesis of conjugated polymers in ionic liquids, achievement of electroactivity and electrochroism of conjugated polymers in ionic liquids, and the use of the resulting conjugated polymers for the fabrication of electrochromic devices incorporating ionic liquids as electrolytes are described.
1259 Citations
20 Claims
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1. A method for preparing an electroactive conjugated polymer which comprises the steps of:
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(a) immersing a pair of electrodes in an anhydrous ionic liquid which is stable in the presence of water containing the monomeric form of the conjugated polymer; and
(b) applying a voltage between the electrodes in the pair of electrodes until a desired quantity of conjugated polymer which is stable in the presence of the ionic liquid is deposited on one of the electrodes in the pair of electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An electrochromic device, comprising in combination:
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(a) a first electrically conducting substrate;
(b) a second electrically conducting substrate spaced apart from said first substrate;
(c) a first conjugated polymer deposited onto the surface of said first substrate facing said second substrate;
(d) a second conjugated polymer deposited onto the surface of said second substrate facing said first substrate;
(e) an ionic liquid electrolyte not containing a polymer additive, disposed between and in electrical contact with said first conjugated polymer and said second conjugated polymer; and
(f) an electrical power supply for applying a voltage between said first substrate and said second substrate. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification