Auxiliary chemical composition for monocrystalline silicon or polycrystalline silicon acidic wool making

Abstract

The invention provides an auxiliary chemical composition for monocrystalline silicon or polycrystalline silicon acidic wool making. The auxiliary chemical composition comprises 0.0001-75 weight% of surface catalysts and the balance of water. The auxiliary chemical composition has the advantages of simple preparation and application methods, easy implementation and good repeatability; when the auxiliary chemical composition is used for the monocrystalline silicon or polycrystalline silicon wool making, the wool making temperature can be increased, and the wool making effect is obviously improved; prepared silicon discs have the characteristics of low reflectivity, clean surfaces and low fragment rate; and the photoelectric conversion efficiency of silicon batteries can be largely improved.

Description

technical field [0001] The invention belongs to the field of new energy, and in particular relates to an auxiliary chemical composition for acid texturing of monocrystalline silicon or polycrystalline silicon, and also relates to the use of the auxiliary chemical composition in preparing acidic texturing liquid for monocrystalline silicon or polycrystalline silicon texturing in the application. Background technique [0002] In order to convert incident light into electric current, solar silicon cells or photovoltaic cells need to be roughened and cleaned on the surface of the silicon wafer, so that the sunlight incident on the silicon surface forms diffuse reflection. The roughening and cleaning treatment of the silicon wafer surface, on the one hand, can extend the optical path, thereby increasing the light absorption rate of the silicon wafer; Carriers, due to the built-in electric field near the PN junction, these photogenerated carriers are more easily collected, which ...

AI Technical Summary

Problems solved by technology

The biggest feature of this process is that it is very simple, but there are still some deficiencies that need to be improved, for example: the color difference of the suede surface after texturing (especially the color difference between different interfaces) is large, the reflectivity is high, and the silicon after etching Chips are fragile, especially the conversion efficiency of silicon cells is not high, etc.

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