JPH02267297A - Production of electrochromic display element - Google Patents

Abstract

PURPOSE:To produce the metal phthalocyanine complex layer consisting of an electrochromic material with excellent productivity on an electrode film by immersing the electrode film and electrode for energization into a soln. prepd. by dissolving metal phthalocyanine into an aq. miscell soln. of a surfactant and energizing the electrode film and the electrode for energization. CONSTITUTION:Lithium bromide is added as a supporting electrolyte into the aq. soln. of the surfactant electrified to plus by an electrolytic oxidation; further, erbium phthalocyanine is added as a film forming material to the soln. and the soln. is ultrasonically treated by an ultrasonic homogenizer to produce the colloidal soln. in which the fine particles of the erbium phthalocyanine are enclosed by the surfactant. Indium oxide, tinned glass substrate and Pt plate are immersed into this soln. and further, a satd. calomel electrode is immersed therein and an electrolytic treatment is executed to form the erbium phthalocyanine layer. A solid electrolyte is provided on the phthalocyanine layer side of the substrate obtd. in such a manner and further, another sheet of the substrate with the phthalocyanine layer positioned on the inner side is stuck thereto, by which the electrochromic display element is produced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing an electrochromic display element.

[Prior Art] Conventionally, methods for forming thin films of metal phthalocyanine complexes as electrochromic materials include vacuum evaporation,
There are plasma polymerization methods, coating methods, etc.

[Problem to be solved by the invention 1 However, methods using vacuum processes such as vacuum evaporation method and plasma polymerization method have problems such as: ■ High cost ■ Low productivity ■ Unsuitable for film formation on large substrates. , coating methods and other wet methods have the problem that it is difficult to obtain a uniform thin film over a large area. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for uniformly molding a metal phthalocyanine layer of an electrochromic material over a large area with high productivity.

[ml! II! Means for Solving the Problem 1 The method for manufacturing an electrochromic display element of the present invention is to form a metal phthalocyanine complex layer by adding an electrode film and a current-carrying layer to a solution in which metal phthalocyanine is solubilized in a micellar aqueous solution of a surfactant. It is characterized by using a method of forming a metal phthalocyanine complex layer on the electrode film by dipping the electrode and applying electricity between the electrode film and the current-carrying electrode.

[Example 1] 0.05M lithium bromide was added as a supporting electrolyte to 100ml of a 2mM aqueous solution of a surfactant that was positively charged by electrolytic oxidation, and 0.5g of erbium phthalocyanine was added as a film-forming material, and the mixture was heated to 60% using an ultrasonic homogenizer. A colloidal solution in which erbium phthalocyanine particles were surrounded by a surfactant was prepared by ultrasonication for a minute.

In this solution, a 5x5 inch square of indium tin oxide (
When a glass substrate with ITO) and a platinum plate were immersed, a saturated calomel electrode (SCE) was further immersed as a reference electrode, and electrolysis was performed for 6 minutes at an electrolytic potential of +0.4V (vs. 5CE) (7), 200OA of erbium A phthalocyanine layer was formed. The thickness of this film was almost the same everywhere in the plane. A solid electrolyte layer was formed on the phthalocyanine layer side of the thus obtained substrate, and another substrate was attached with the phthalocyanine layer on the inside to fabricate an electrochromic display element. , red at +2V and blue at -2V, confirming that it is possible to produce an electrochromic display element by the method of the present invention.

[Effects of the Invention] As described above, according to the method of manufacturing an electrochromic display element of the present invention, the film formation rate is not affected even if the electrolytic potential within the substrate is different, so that the size of the substrate can be changed. , the film can be formed uniformly regardless of the shape, the process equipment is simple, the cost is low, and it is excellent in mass production. Therefore, the electrochromic layer can be formed uniformly over a large area with good productivity.

Claims (1)

[Claims] In a method for manufacturing an electrochromic display element in which a metal phthalocyanine complex layer is provided as an electrochromic material in the form of an electrode film, the metal phthalocyanine complex layer is formed by adding an electrode to a solution in which metal phthalocyanine is solubilized in a micellar aqueous solution of a surfactant. A method for producing an electrochromic display element, characterized by using a method of forming a metal phthalocyanine complex layer on the electrode film by immersing the film and the current-carrying electrode, and applying current to the electrode film and the current-carrying electrode.