Electrochromic composition and electrochromic device
An electrochromic composition is provided, including: a first oxidizable compound with a concentration range of 0.01M-0.5M; a reducible compound with a concentration range of 0.01M-0.5M; an electrolyte with a concentration range of 0.01M-0.5M; and a solvent, wherein the first oxidizable compound is represented by the following formula: wherein X 1 , X 2 and X 3 are independently the same or different substituted or unsubstituted aromatic hydrocarbon group, wherein the aromatic hydrocarbon group includes the groups represented by the following formulas:
1 . An electrochromic composition, comprising:
a first oxidizable compound with a concentration range of 0.01M-0.5M;
a reducible compound with a concentration range of 0.01M-0.5M;
an electrolyte with a concentration range of 0.01M-0.5M; and
a solvent,
wherein the first oxidizable compound is represented by the following formula:
wherein X 1 , X 2 and X 3 are independently the same or different substituted or unsubstituted aromatic hydrocarbon group, wherein the aromatic hydrocarbon group includes the following:
2 . The electrochromic composition claimed in claim 1 , wherein the reducible compound is a viologen compound.
3 . The electrochromic composition as claimed in claim 2 , wherein the reducible compound is represented by the following formula:
wherein R 1 is a C1-C16 alkyl group.
4 . The electrochromic composition as claimed in claim 1 , wherein a molar ratio of the first oxidizable compound and the reducible compound is 1:0.01 to 1:50.
5 . The electrochromic composition as claimed in claim 1 , wherein the electrolyte comprises a lithium salt, an amine salt, a tetraalkylammonium salt, or an imidazolium salt.
6 . The electrochromic composition as claimed in claim 1 , further comprising:
a second oxidizable compound different from the first oxidizable compound.
7 . The electrochromic composition as claimed in claim 1 , further comprising:
a UV absorber, a UV blocker, an IR absorber, an IR blocker, or a combination thereof.
8 . An electrochromic device, comprising:
a first transparent substrate having a first transparent conductive layer on one of its surfaces;
a second transparent substrate having a second transparent conductive layer on one of its surfaces, wherein the first transparent conductive layer is disposed opposite to the second transparent conductive layer;
an adhesive spacer, wherein the adhesive spacer is bonded between the first transparent conductive layer and the second transparent conductive layer, so that a closed space is formed among the first transparent substrate, the second transparent substrate, and the adhesive spacer; and
an electrochromic composition filled into the closed space, wherein the electrochromic composition is as claimed in claim 1 .
9 . The electrochromic device as claimed in claim 8 , wherein a distance between the first transparent conductive layer and the second transparent conductive layer is 1 μm to 300 μm.
10 . The electrochromic device as claimed in claim 8 , wherein the adhesive spacer comprises a filler and an adhesive.
11 . The electrochromic device as claimed in claim 10 , wherein the adhesive includes a thermosetting adhesive, a light-curing adhesive, or a combination thereof.
12 . The electrochromic device as claimed in claim 10 , wherein the filler includes plastic, glass beads, sand powder, or a combination thereof.