Electrochromic media with concentration-enhanced stability, process for the preparation thereof and use in electrochromic devices
US6137620A · kind A · utility
189Cited by
18References
42Claims
0Family size
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Key dates
| Filing date | Apr 30, 1999 |
| Grant date | Oct 24, 2000 |
| Priority date | — |
| Expiry date | Apr 30, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2001/15145
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Increased stability of electrochromic devices containing an electrochromic medium having two or more electroactive compounds is accomplished by establishing current limiting concentrations of electroactive compounds with the larger redox potential difference. A process for production of electrochromic devices uses targeted concentrations of electroactive materials during preparation of the electrochromic medium which results in substantially no devices being produced wherein the current is limited by an electroactive compound having a low redox potential difference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.