Method for preparing permutable multi-dye absorption layer co-sensitized thin film by electrochemical desorption method

Abstract

The invention relates to a method for preparing a permutable multi-dye absorption layer co-sensitized thin film by an electrochemical desorption method, which comprises the following steps of: (1) preparing a nano porous semiconductor thin film on a conductive glass substrate; (2) dipping the nano porous semiconductor thin film in the solution of dye a so that the thin film completely absorbs the solution of the dye a; (3) using the nano porous semiconductor thin film which absorbs the dye a as a work electrode and a platinum sheet as a desorption electrode; (4) dipping the semiconductor thin film containing a dye blank layer into a second dye b so that the dye blank layer absorbs the dyes to obtain the co-sensitized thin film containing two dye absorption layers; and (5) repeating the steps (3) and (4) to obtain the co-sensitized thin film containing the multi-dye absorption layer. The invention has the advantages that the contradiction among dye absorption time, dye absorption amount and the dye blank layer thickness in original method for preparing the co-sensitized thin film only by dye absorption can be solved; and the thickness of each dye absorption layer is adjusted and controlled by controlling the depth of potential distribution.

Description

technical field [0001] The invention belongs to the intersecting field of electrochemistry and nanometer materials, and in particular relates to a method for preparing co-sensitized thin films with arrangable multi-dye adsorption layers through an electrochemical desorption method. Background technique [0002] year 1991 The new photovoltaic device developed by the professor—the dye-sensitized solar cell has opened up a new field for human beings to use solar energy to generate electricity. Dye-sensitized solar cells have attracted widespread attention due to their unique structural design and unusual photoelectric conversion modes. Dye-sensitized solar cells are a heterogeneous photoelectrochemical system, which mainly consists of a "sandwich" structure consisting of conductive glass, nanoporous semiconductor film, dye, electrolyte and platinum counter electrode. Among these components, the semiconductor film (sensitized film) with a thickness of only about 10 μm and a...

AI Technical Summary

Problems solved by technology

Due to the current preparation method, it is difficult to freely change the thickness of the dye adsorption layer, the position of the adsorption layer, the amount of dye adsorption and the sequence of the dye adsorption layer, so that the structure of the adsorption layer cannot be optimized in depth, resulting in poor co-sensitization effect of the film, which limits the absorption of the co-sensitized film. Further Broadening of the Spectrum

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