Single compartment self-erasing electrochromic device

Abstract

An electrochromic device comprising three elements. The first element is a first electrode. The second element is a second electrode. The second electrode is spaced apart from the first electrode so that there is a space between the first electrode and the second electrode. The third element is a dispersion positioned in the space. The dispersion is in electrical contact with the first electrode and with the second electrode. The dispersion comprises a transition metal surface substituted polyoxometalate and a solvent. The first and second electrodes can be a transparent electronically conducting layer of indium-tin oxide coated upon a panel of glass. The transition metal surface substituted polyoxometalate can be Li.sub.x MnPW.sub.11 O.sub.40. The dispersion is resistant to photodegradation such as discoloring in sunlight.

Dependencies are inferred from the claim text.