Electrochromic system

US5260821A · kind A · utility

Assignee

• SCHUECO INTERNATIONAL KG · DE

Inventors

• Wing F. Chu · Frankfurt am Main, DE
• Volker Leonhard · Kriftel, DE
• Rolf Hartmann · Jena, DE
• Gertraud Ganson · Oberursel, DE
• Werner Weppner · Stuttgart, DE

Key dates

• Filing date: Apr 6, 1992
• Grant date: Nov 9, 1993
• Expiry date: Apr 6, 2012

Classification

• Technology area (CPC G): Physics
• CPC primary: G02F1/1525
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An electrochromic system. It comprises layers of solid/materials deposited on glass or another substrate. The solids function in an atmosphere that can be dry. One layer is preferably Li.sub.3 AlF.sub.6 and conducts positive lithium ions. Another layer is a counterelectrode. The counterelectrode is improved to the extent that it can reversibly accept ions from and donate them to the ion conductor while remaining extensively transparent. The counterelectrode can be Li.sub.x TiO.sub.y, (Li.sub.2 O).sub.m (WO.sub.3).sub.n (Sb.sub.2 O.sub.3), or (Li.sub.2 O).sub.m (WO.sub.3).sub.n (CeO.sub.2).sub.o.