Method for preparing copper-indium-gallium-selenium(sulfur) light absorption layer by adopting non-vacuum process

Abstract

The invention relates to a method for preparing a copper-indium-gallium-selenium(sulfur) light absorption layer by adopting a non-vacuum process. The method comprises the following steps of: in a formula ratio, blending spherical and non-spherical two component powder, three component powder or four component powder containing IB, IIIA and VIA group elements to obtain copper-indium-gallium-selenium(sulfur)-containing mixed powder, wherein the average grain size of the powder is less than 500 nanometers; adding a solvent, NaI and an interface active agent into the copper-indium-gallium-selenium(sulfur)-containing mixed powder, stirring the mixture to obtain copper-indium-gallium-selenium(sulfur)-containing pulp; coating the pulp on a molybdenum electrode-containing substrate by a non-vacuum coating method, obtaining a copper-indium-gallium-selenium(sulfur)-containing light absorption precursor layer by soft-baking; and putting the copper-indium-gallium-selenium(sulfur)-containing light absorption precursor layer in a high-temperature RTA furnace containing VIA group element powder for growing crystals, and obtaining the copper-indium-gallium-selenium(sulfur) light absorption layer. In the method, because the spherical nanometer particles and at least one kind of non-spherical nanometer particles are mixed, the pore problems occurring in the film-forming process are solved; in addition, a selenization method is not adopted, so that the dangerous hydrogen selenide is avoided using.

Description

technical field [0001] The invention relates to a method for making a light absorbing layer, in particular to a method for making a copper indium gallium selenide (sulfur) light absorbing layer by a non-vacuum process. Background technique [0002] In recent years, with the rise of international oil prices and the rise of environmental protection awareness, green energy has become the mainstream of new energy. Among them, solar cells are obtained from the stable radiation energy of the sun, and the source will not be exhausted. Funding and policy subsidies are used to support the local solar cell industry, making the global solar industry develop very rapidly. [0003] The first generation of solar modules includes monocrystalline silicon and polycrystalline silicon solar modules. Although the photoelectric conversion efficiency is high and the mass production technology is mature, due to the high cost of materials and the lack of supply of silicon wafers due to the needs of...

AI Technical Summary

Problems solved by technology

[0010] This shows that above-mentioned existing method for making light-absorbing layer obviously still has inconvenience and defect in method and use, and urgently needs to be further improved

In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but there has been no suitable method to solve the above-mentioned problems for a long time. This is obviously a problem that the relevant industry is eager to solve

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