Electrochromic element and lens for spectacles
An electrochromic element in which a decrease in responsiveness is minimized by making a side of the electrochromic element have gas barrier properties, and a lens for spectacles, the electrochromic element including a pair of electrode layers and an electrochromic layer arranged between the electrode layers, wherein a barrier layer surrounding the electrochromic layer is provided.
1 . An electrochromic element comprising a pair of substrates, a pair of electrode layers provided on inner surfaces of the pair of substrates, and an electrochromic layer arranged between the electrode layers,
wherein opposite ends of each of the pair of substrates extend outward beyond side surfaces of the electrochromic layer,
wherein a barrier layer surrounding the electrochromic layer is provided,
wherein the barrier layer and a sealing layer for sealing between the pair of substrates are separately provided,
wherein the barrier layer has higher gas barrier properties than the sealing layer,
wherein the sealing layer has higher adhesiveness than the barrier layer, and
wherein the sealing layer is in contact with the electrochromic layer on an inner side surrounding the electrochromic layer, and the barrier layer is arranged outside the sealing layer.
2 . The electrochromic element according to claim 1 ,
wherein the barrier layer is formed of a material having a higher electrical resistivity than the electrode layers.
3 . The electrochromic element according to claim 1 ,
wherein the barrier layer is formed of a UV curing resin, a thermosetting resin, or a low-melting-point material.
4 . A lens for spectacles including the electrochromic element according to claim 1 .