A kind of preparation method of composite solar cell

Abstract

The invention discloses a preparing method for a composite solar cell. The preparing method for the composite solar cell comprises the steps that firstly, a CdS film is prepared, wherein a layer of n-CdS film material is prepared on the surface of the conductive side of conductive glass through the chemical bath method and serves as a window material and p-n joint n type material; secondly, a CdTe film is prepared, wherein another conductive glass is taken, a layer of p-CdTe film material is prepared on the surface of the conductive side through the electrochemical deposition method and serves as a p-n joint p type material and a back electrode; thirdly, the composite solar cell is packaged, wherein the two pieces of conductive glass on which the CdS film and the CdTe film material are prepared respectively are clamped and fixed through clamps and placed in a high-temperature furnace to be annealed, and the CdS film and the CdTe film lean against each other in a face-to-face mode. By means of the mode, according to the prepared solar cell, when the cadmium sulphide CdS film and the cadmium telluride CdTe film are attached to each other, it is guaranteed that the cadmium sulphide CdS film material cannot disengage easily.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a method for preparing a composite solar cell. Background technique [0002] The protection of human living environment and energy issues are common problems faced by human society today. According to calculations, fossil fuels such as coal, oil, and natural gas are expected to last about a century at most, and their limited quantities constitute an irreconcilable contradiction with the unlimited demands of human beings. What's more serious is that with the continuous depletion of fossil fuels, the environmental pollution problems such as greenhouse gases and nitrogen oxides produced by the burning of fossil fuels are becoming more and more serious. Therefore, the development of clean, pollution-free and huge reserves of renewable energy has become a challenge for mankind. major problem. Therefore, solar energy is regarded as the main field of energy research in the 21st century. Com...

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Problems solved by technology

[0004] At present, there are many methods for preparing CdS / CdTe polycrystalline thin film solar cells. The traditional method is to first prepare a layer of n-CdS thin film material on the surface of conductive glass by chemical water bath method, and then prepare a layer of p-CdTe thin film material on the surface of CdS , and finally deposit a layer of back electrode on the surface of CdTe; the preparation of CdTe thin film materials includes near-field sublimation method, thermal evaporation method, magnetron sputtering and electrochemical deposition method, among which the electrochemical deposition method is simple due to its simple equipment and low cost. It has been paid attention to by people, but at the same time, the problem is that when the CdTe film is prepared by electrochemical deposition on the surface of CdS, it is easy to cause the CdS film material to fall off, thereby causing device damage.

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