Electrochromic device using transition metal oxide and method of producing same
US4784477A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1987 |
| Grant date | Nov 15, 1988 |
| Priority date | — |
| Expiry date | Jul 17, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/1524
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention relates to an electrochromic (EC) device having oppositely arranged two substrates at least one of which is transparent and each of which is coated with an electrode film on the inside surface, a first EC layer which is formed on the electrode film of one substrate and is formed of a transition metal oxide that takes on color in its electrochemically reduced state, such as WO.sub.3, an opposite EC layer which is formed on the electrode film of the other substrate and is formed of another EC material, such as a polytriphenylamine that takes on color in its electrochemically oxidized state, and an electrolyte solution which uses a nonaqueous solvent and occupies the space between the two substrates. According to the invention, the transition metal oxide layer contains such an amount of adsorption water that the concentration of water in the electrolyte solution in the device becomes more than 0% and not more than 0.3% by weight. This is effective for enhancement of the durability of the transition metal oxide layer and also for improvements in the response characteristics of the metal oxide layer as an EC layer. The transition metal oxide layer is formed as a film by a …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.