All-solid electrochromic element

Abstract

Abstract PURPOSE: To provide an all-solid electrochromic element in which the speed to response, a change in the amount of light and voltage during repeated driving are improved, by a method wherein there are provided a specified oxidation-color developing membrane and a specified reduction-color developing membrane between a pair of electrodes, and there is provided an insulating membrane between both membranes. CONSTITUTION: On a transparent base plate 1 such as glass are stacked in sequence a transparent electrode 2 such as In 2 O, an oxidation-color developing membrane 3 having an optical membrane thickness of about 500Å and consisting of Ir(OH) 3 and/or Ni(OH) 2 , an insulating membrane 4 having an optical membrane thickness of about 15,000Å, which functions as a proton-conducting and electron-insulating member and consists of Ta 2 O 5 , ZrO 2 , a reduction-color developing membrane 5 having an optical membrane thickness of about 7,500Å and consisting of WO 3 and/or MoO 2 , and a transparent electrode 6 such as In 2 O. By this constitution, the response speed becomes several times faster than that of the prior art, voltage to be applied is lowered, and a change is transmittance can be enhanced above six times that of the prior art at a voltage which is not higher than one-eight of the voltage of the prior art during repeated driving. COPYRIGHT: (C)1981,JPO&Japio

Inventors

• 👤 Yosuke Takahashi
• 👤 Hideki Akasaka
• 👤 Toshikatsu Komizu
• 👤 Tatsuo Niwa

Bibliographic Details