Electrochromic display devices using iron(III) hexacyanoferrate(

Details Electrochromic display devices using iron(III) hexacyanoferrate( Electrochromic display devices using iron(III) hexacyanoferrate(

1982-05-25

1985-02-12

Arnold, Bruce Y.

Chemistry: electrical and wave energy

Apparatus

Coating, forming or etching by sputtering

204 56R, 204290R, 204292, G02F 101, C25D 1100, C25B 1104

Patent

active

044987390

ABSTRACT:
An electrochromic display device comprises an electrolyte contained between a pair of spaced-apart substrates. A set of electrodes are disposed on at least one of the substrates in contact with the electrolyte and a layer of electrochromic material is disposed on at least one of the electrodes to define a display electrode. The electrochromic material comprises a color-reversible salt of iron(III) hexacyanoferrate(II) which, depending on its oxidation-reduction state, exhibits different colors. A source of electric charge is connected through circuitry to effect reversible electrochemical oxidation and reduction of the salt of iron(III) hexacyanoferrate(II) to effect a corresponding reversible color change exhibited by the display electrode.

REFERENCES:
Vernon D. Neff, J. Electrochem. Soc.: Electrochemical Science & Technology, 125, No. 6, 886-887 (1978).

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