Electrochromic element, optical filter, lens unit, and image pick-up apparatus
First Claim
1. An electrochromic element comprising:
- a first electrode;
a second electrode; and
a third electrode, wherein;
at least one of the first electrode and the second electrode is a transparent electrode, and an electrolyte, an anodic organic electrochromic compound, and a cathodic redox substance are present between the first electrode and the second electrode,the third electrode is electrically connectable to the first electrode or the second electrode via the electrolyte,the third electrode contains an irreversible oxidation substance, andan oxidation potential C of the irreversible oxidation substance is between an oxidation potential A of a reversible first oxidation reaction of the anodic organic electrochromic compound and an oxidation potential B of an irreversible oxidation reaction of the anodic organic electrochromic compound.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention provides an electrochromic element that includes a first electrode, a second electrode, and a third electrode, wherein at least one of the first electrode and the second electrode is a transparent electrode, and an electrolyte, an anodic organic electrochromic compound, and a cathodic redox substance are present between the first electrode and the second electrode, the third electrode is electrically connectable to the first electrode or the second electrode via the electrolyte, the third electrode contains an irreversibly oxidizable substance, and the oxidizable substance is not oxidized by a first oxidant of the anodic organic electrochromic compound but is more easily oxidizable than a reductant in an irreversible oxidation reaction of the anodic organic electrochromic compound.
7 Citations
18 Claims
-
1. An electrochromic element comprising:
-
a first electrode; a second electrode; and a third electrode, wherein; at least one of the first electrode and the second electrode is a transparent electrode, and an electrolyte, an anodic organic electrochromic compound, and a cathodic redox substance are present between the first electrode and the second electrode, the third electrode is electrically connectable to the first electrode or the second electrode via the electrolyte, the third electrode contains an irreversible oxidation substance, and an oxidation potential C of the irreversible oxidation substance is between an oxidation potential A of a reversible first oxidation reaction of the anodic organic electrochromic compound and an oxidation potential B of an irreversible oxidation reaction of the anodic organic electrochromic compound. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. An electrochromic element comprising:
-
a first electrode; a second electrode; and a third electrode, wherein; at least one of the first electrode and the second electrode is a transparent electrode, and an electrolyte, a cathodic organic electrochromic compound, and an anodic redox substance are present between the first electrode and the second electrode, the third electrode is electrically connectable to the first electrode or the second electrode via the electrolyte, the third electrode contains an irreversible reduction substance, and a reduction potential F of the irreversible reduction substance is between a reduction potential D of a reversible first reduction reaction of the cathodic organic electrochromic compound and a reduction potential E of an irreversible reduction reaction of the cathodic organic electrochromic compound.
-
Specification