A wedge-shaped brush used for smoothing the sharp corners and edges of silicon velvet

Abstract

The invention provides a wedge-shaped hairbrush for smoothing the sharp corners and edges of the silicon velvet surface, comprising a bristle fixing plate and a number of bristles fixed on the combing hair fixing plate; the bristles include a cylindrical body and a wedge-shaped bristle head at the lower part; The length of the cylindrical main body is L and the diameter is d; the aspect ratio L / d<40; the sharp corners of the wedge-shaped bristle head can go deep into the two pyramids of the suede surface of the silicon wafer to be processed to smooth the edges; the wedge-shaped bristle The tip angle of the head is α<70°. The present invention adopts the design that the length-to-diameter ratio of the bristles is L / d<40, the length of the wedge-shaped bristle head is uneven, and the included angle of the tip is less than 70° of the included angle between the tower and the valley of the suede surface, and the pyramid suede structure of the silicon chip is smoothed by using a polishing agent It solves the problem that subsequent thin films cannot be completely covered, improves the photoelectric conversion efficiency of perovskite / crystalline silicon stacked solar cells, and is simple to operate, low in cost and easy to use, suitable for large-scale use.

Description

technical field [0001] The invention belongs to the field of perovskite / crystalline silicon stacked solar cells, in particular to a wedge-shaped brush used for smoothing the sharp corners and edges of silicon wool surfaces. Background technique [0002] With the progress of social development, environmental pollution and energy shortage have become two major problems plaguing the world. Fossil fuels are non-renewable resources with limited reserves and will cause certain environmental pollution during use. Solar energy is a green, safe and sustainable clean energy, and it is the most suitable substitute for traditional fossil fuels, and has broad prospects in the energy field. In recent years, the preparation technology of crystalline silicon / perovskite tandem solar cells has become a hot spot in the field of energy research. The preparation process of crystalline silicon solar cells is mature and industrialized. Perovskite materials have excellent carrier transport chara...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a wedge-shaped brush for smoothing the sharp corners and edges of the silicon textured surface. The device can smooth the pyramid textured surface structure of the silicon chip and solve the problem that the subsequent film cannot be completely covered. , to improve the photoelectric conversion efficiency of perovskite / crystalline silicon tandem solar cells

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