VIOLOGEN-BASED ELECTROCHROMIC COMPOSITIONS WHICH CAN BE FORMULATED AND APPLIED AT ROOM TEMPERATURE
First Claim
Patent Images
1. Electrochromic composition comprising:
- (a) a viologen derivative of formula (I);
2 Assignments
0 Petitions
Accused Products
Abstract
The invention relates to electrochromic compositions comprising:
- (a) a viologen derivative of formula (I)
- (b) an electron mediator;
- (c) a polymer compound of formula (II)
- (d) a plasticizer of formula (III): and
- (e) a mixture of at least two miscible solvents which dissolve components (a) to (d) at room temperature, at least one of them being a solvent with a high boiling point.
Said electrochromic compositions can be formulated and applied at room temperature, therefore they allow preparing electrochromic devices with heat-sensitive substrates, particularly with fully plastic substrates, with a high degree of transparency and with a high optical contrast.
14 Citations
18 Claims
-
1. Electrochromic composition comprising:
(a) a viologen derivative of formula (I); - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
Specification