Preparation method of nickel oxide/poly(3,4- ethylenedioxythiophene) compound electrochromic film

Abstract

The invention relates to a preparation method of nickel oxide / poly(3,4- ethylenedioxythiophene) compound electrochromic film. The preparation method comprises following steps: adding nickel acetate tetrahydrate and urea into absolute ethanol to prepare a reaction solution, putting FTO conductive glass, which has been washed by ultrasonic, into a hydrothermal reactor filled with the reaction solution, controlling the temperature in the range of 160 and 180 DEG C, maintaining the temperature for 6 to 12 hours, cooling to the room temperature, washing, burning so as to obtain FTO conductive glass with a NiO layer, dissolving 4- ethylenedioxythiophene monomers into a propylene carbonate solution of lithium perchlorate to obtain deposition liquid, then putting the FTO conductive glass with a NiO layer into the deposition liquid to play as a work electrode, taking a platinum slice as the counter electrode, then performing electro-deposition reactions so as the obtain the product. The preparation method has the advantages of simple technology and low cost, structure design in the micro-nano grade of the inorganic / organic compound electrochromic materials can be achieved, so the respective advantages of the organic and inorganic electrochromic materials can be fully utilized.

Description

technical field [0001] The invention belongs to the field of preparation of electrochromic thin films, in particular to a preparation method of nickel oxide / poly(3,4-ethylenedioxythiophene) composite electrochromic thin films. Background technique [0002] Electrochromic materials, as one of the most promising smart materials, have been extensively studied, especially transition metal oxides. However, there are still many problems in applying the currently studied transition metal oxides to the fields of electrochromic multicolor display devices and the like. First, the color change response time of transition metal oxide electrochromic thin films is slower than that of conductive polymer electrochromic materials. Transition metal oxides or their derivatives, the color change is caused by the double injection and double extraction of ions and electrons, which is controlled by the ion migration speed, so the response time is relatively slow; moreover, the stability of the tr...

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Problems solved by technology

Such as CN101891402A discloses a kind of sol-gel method to prepare WO 3 / Poly(3,4-ethylenedioxythiophene) composite electrochromic thin film method, F.Marystela et al reported a kind of LBL membrane method to prepare organic / inorganic on J.Phys.Chem.B107(2003)8351 Composite electrochromic thin film method, but the composite electrochromic thin film prepared by these methods is generally a multilayer structure, the composite form is single, the mutual contact area is small, the organic and inorganic composite is not sufficient, and cannot be fully integrated and play their respective advantages

Therefore, there will be problems such as the instability of the physical and chemical combination between the various film layers and the incompatibility of the preparation process.

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