Transmission type electrochromic element

Abstract

Abstract PURPOSE:To manufacture easily a large-sized element of high contrast by using a specified mixed valence complex which develops color in an oxidized state as the material of the 1st EC layer of a transmission type EC element and a heterocyclic conjugated polymer or a metallic oxyhydroxide as the material of the 2nd EC layer. CONSTITUTION:The 1st EC layer 3 is formed on the surface of one of electrodes 2, 2 placed opposite to each other with a sealant 4 inbetween, the 2nd EC layer 5 is formed on the counter electrode 2, and an electrolyte 6 is sealed in the space between the electrodes 2, 2 to manufacture an ECD. At least one of the electrodes 2, 2 is transparent. The 1st EC layer 3 is made of a mixed valence complex which develops color in an oxidized state. The complex is represented by a formula M1x[M2(CN)6]y (where each of M1 and M2 is a transition metal, x is 3-4, and y is 2-3). The 2nd EC layer 5 is made of a heterocyclic conjugated polymer or a metallic oxyhydroxide. The EC layers 3, 5 develop deep color at the same time when color is developed, and they are made colorless at the same time when the color is vanished, so high contrast and high display quality are attained. Since the layers 3, 5 can be formed by electrodeposition or other method without requiring a vapor depositing apparatus, a large-sized element is easily manufactured at a low cost.

Inventors

• 👤 Takao Kase
• 👤 加瀬　崇夫
• 👤 Harutoshi Miyagi
• 👤 宮城　治俊
• 👤 Shigenori Kazama
• 👤 重徳 風間

Bibliographic Details