A method for preparing sensitized battery cuse back electrode by active selenium disproportionation at room temperature

Abstract

The invention discloses a method for preparing a CuSe back electrode of a sensitization battery with activated Se disproportionation at room temperature. The method comprises the steps of (a) preparing a selenosulfate water solution, wherein firstly, sodium sulfite is dissolved in deionized water to form a sodium sulfite solution, then Se powder is added into the sodium sulfite solution, and the solution is heated until the Se powder is completely dissolved to form the selenosulfate water solution; (b) preparing red activated elemental Se, wherein firstly, the appearance of the back electrode is formed by sticking traceless adhesive tape to a conductive substrate, then the area of the appearance of the back electrode is paved with the selenosulfate water solution, then ethanol solution is sprayed to the area of the appearance of the back electrode, and the red activated elemental Se is separated out on the substrate; (c) dissolving Cu salt into ethanol, and obtaining the ethanol solution with Cu ions; (d) washing the substrate with the red activated elemental Se with the ethanol, and then immersing the substrate into the ethanol solution with the Cu ions until the reaction is complete to obtain the CuSe back electrode. The CuSe back electrode synthesized through the method is good in catalysis effect and high in stability, and the implement method is simple.

Description

technical field [0001] The invention relates to a method for preparing a back electrode of a fuel-sensitized battery, in particular to a method for preparing a CuSe back electrode of a sensitized battery at room temperature with active selenium. Background technique [0002] Unlike silicon solar cells, which use the built-in electric field to separate photogenerated electrons and holes, sensitized solar cells, one of the third-generation solar cells, use the energy level difference of semiconductor materials to separate photogenerated electrons and holes. As an important part, the back electrode plays the role of reducing photogenerated holes, so the catalytic performance of the back electrode directly affects the fill factor of the battery and the stability of the photocurrent. In recent years, as the laboratory efficiency of sensitized batteries has continuously broken through 13% (dye) and 6% (quantum dots), the preparation of matching sensitized battery back electrodes h...

AI Technical Summary

Problems solved by technology

Generally speaking, it can be divided into the following three categories: (1) after preparing II-IV particles and then depositing them, the effect of the back electrode prepared by this method is better, but it cannot be mass-produced and the preparation method is complicated; (2) on the alloy metal sheet Use the corrosion method to etch the available back electrode. This method is simple and effective, but the stability of the prepared back electrode is poor. During the working process, the back electrode will be continuously corroded by the electrolyte. The most important thing is that this method is prepared The back electrode is only suitable for scientific research and cannot be assembled into solar cells

(3) The back electrode is prepared by electrodeposition and continuous ion layer adsorption. The preparation process of this method is relatively simple but the back electrode is relatively thin and the catalytic effect is poor, and the contact between the back electrode material and the substrate is not good.