| abstract |
Electrochemichromic solutions (and mirrors containing them), use of solvents comprising at least about 25% 3-hydroxypropionitrile, 3,3′-oxydipropionitrile, 2-acetylbutyrolactone, 2-methylglutaronitrile or 3-methylsulpholane or a mixture thereof. Also disclosed are vacuum backfilling techniques for filling electrochemichromic cells having enhanced UV stability through UV self-screening by the solvent. |