Wedge-shaped brush for smoothing silicon textured sharp corners and edges

Abstract

The invention provides a wedge-shaped brush for smoothing silicon textured sharp corners and edges. The wedge-shaped brush comprises a brush hair fixing plate and a plurality of pieces of brush hair fixed to the brush hair fixing plate. Each piece of brush hair comprises a cylindrical body and a lower wedge-shaped brush hair head. The cylindrical body has a length of L, a diameter of d, and a length-to-diameter ratio L / d<40. The sharp corner of the wedge-shaped brush hair head can go deep into a location between the two pyramids of the textured surface of a silicon wafer to be processed in order to smooth the edges. The wedge-shaped brush hair head has a corner angle of [alpha] < 70 degrees. The wedge-shaped brush uses the design that the length-to-diameter ratio of the brush hair is L / d<40, the lengths of the wedge-shaped brush hair heads are different, and the textured tower corner angle is less than 70 degrees. The pyramidal textured structure of the silicon wafer is smoothed by a polishing agent so as to solve the problem that a subsequent film cannot be completely covered, and improve the photoelectric conversion efficiency of the perovskite / crystalline silicon laminated solarcell. The wedge-shaped brush is easy to operate, low in cost, easy to use, and 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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