Organic electrochromic device, optical filter, lens unit, and imaging apparatus

An organic electrochromic device, comprising:

• a pair of electrodes;
• and
• an electrochromic layer arranged between the pair of electrodes,
• wherein:
• the electrochromic layer contains an organic electrochromic material, a redox substance, and a solvent;
• the organic electrochromic material and the redox substance each comprise a material to be reversibly subjected to a redox reaction;
• a peak change amount of a molar absorption coefficient caused by the redox reaction of the redox substance is ¼ or less than that of the organic electrochromic material;
• and
• the organic electrochromic material has a first oxidation potential and a second oxidation potential, and an oxidation potential of the redox substance is present between the first oxidation potential and the second oxidation potential, or
• the organic electrochromic material has a first reduction potential and a second reduction potential, and a reduction potential of the redox substance is present between the first reduction potential and the second reduction potential.

An organic electrochromic device, comprising:

• a pair of electrodes;
• and
• an electrochromic layer arranged between the pair of electrodes,
• wherein:
• the electrochromic layer contains an organic electrochromic material, a redox substance, and a solvent;
• the organic electrochromic material and the redox substance each comprise a material to be reversibly subjected to a redox reaction;
• and
• the organic electrochromic material has a first oxidation potential and a second oxidation potential, and an oxidation potential of the redox substance is present between the first oxidation potential and the second oxidation potential, wherein a value of current resulting from a reaction of the redox substance at a half-wave potential of a first oxidation reaction of the organic electrochromic material is ⅕ or less of a value of current resulting from the first oxidation reaction of the organic electrochromic material;
• or
• the organic electrochromic material has a first reduction potential and a second reduction potential, and a reduction potential of the redox substance is present between the first reduction potential and the second reduction potential, wherein a value of current resulting from a reaction of the redox substance at a half-wave potential of a first reduction reaction of the organic electrochromic material is ⅕ or less of a value of current resulting from the first reduction reaction of the organic electrochromic material.