CuxS (x=1-2) counter electrode preparation method for quantum dot sensitization solar batteries

Abstract

The invention discloses a CuxS (x=1-2) counter electrode preparation method for quantum dot sensitization solar batteries. Cuprous sulfide powder and elemental sulfur powder of different ratio are mixed, a counter electrode is manufactured on a base body like conductive glass through a thermal evaporation method, and the counter electrode, a photo-positive electrode and electrolyte can form the quantum dot sensitization solar battery. The preparation method is simple, can prepare in large area, can easily manufacture counter electrodes with high efficiency and low cost and is suitable for manufacturing various quantum dot sensitization solar batteries.

Description

technical field [0001] The invention belongs to the field of manufacturing quantum dot sensitized solar cells, in particular to a Cu alloy for quantum dot sensitized solar cells x Preparation method of S(x=1–2) counter electrode. Background technique [0002] Solar photovoltaic power generation can be regarded as the most beautiful, longest-lived and most reliable power generation technology so far. After more than one hundred years of history, it has developed from the first generation of crystalline silicon solar cells to the third generation of solar cells. Dye-sensitized solar cells (DSCs) are known as one of the most promising solar cells because of their cheap cost (the production cost is only 1 / 5-1 / 10 of that of silicon solar cells) and simple manufacturing process. . At present, the photoelectric conversion efficiency of DSCs exceeds 12%, and various technical indicators are already very close to the requirements of practical applications. [0003] In recent year...

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Problems solved by technology

However, these kinds of counter electrodes all have certain problems. For example, noble metal counter electrodes such as platinum and gold are easily poisoned in polysulfide electrolytes, have low catalytic activity and high cost; although carbon counter electrodes are cheap, their activity still cannot reach Satisfy the level of high-efficiency work of the battery; most metal sulfide counter electrodes need to be prepared through complex physical and chemical processes such as solvothermal and then obtained by spin coating or screen printing; cuprous sulfide counter electrodes obtained by corroding copper sheets are not It overcomes the problems of cost and activity, but it is difficult to meet the practical needs because the electrolyte continuously corrodes the copper sheet, which will lead to changes in the composition of the electrolyte and the problem of difficult packaging.

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