Electrochromic pane

Details Electrochromic pane Electrochromic pane

1997-06-04

1998-08-11

Epps, Georgia Y.

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359274, G02F 1153

Patent

active

057935181

ABSTRACT:
An electrochromic system comprising a transparent electrically conducting film (2), a film (3) of a cathodic electrochromic material, which is capable of reversibly inserting M.sup.+ cations of type H.sup.+ or Li.sup.+, an electrolyte film (5), counter-electrode film (7) made of an anodic electrochromic material, and a second electrically conducting film (8), said structure having a barrier film (6) interposed between electrolyte (5) and the counter-electrode (7), which barrier film is open to the diffusion of the M.sup.+ cations and which is constituted of the following materials selected from the group consisting of oxides of metals of Group VB of the Periodic Table, mixtures of these oxides, CeF.sub.3, Sb.sub.2 O.sub.3, HUP (hexauranylphosphate), Cr.sub.2 O.sub.3, ZrO.sub.2, and an ion conductor material of Li.sub.3 N, LiTaO.sub.3, LiAlF.sub.4, Li.sub.3 PO.sub.4, LiBO.sub.2 or LiNbO.sub.3.

REFERENCES:
patent: 4193670 (1980-03-01), Giglia et al.
patent: 5404244 (1995-04-01), Van Dine et al.
Cogan and Rauh, "The a-WO3/a-lrO2 Electrochromic System," Large-Area Chromogenics: Materials and Devices for Transmittance Control, 22-24 Sep. 1988, vol. IS 4, pp. 483-493.

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