Preparation method for pile face black silicon material

Abstract

The present invention provides a preparation method for a pile face black silicon material, comprising a rough technology step and a next black silicon layer preparation step, wherein the rough technology step comprises: dispersing polystyrene particle beads in the water to form a single layer bead membrane on the water surface; attaching the single layer bead membrane onto a silicon chip by the film salvaging method; implementing the reactive ion etch on the surface of the silicon chip attached with the single layer polystyrene bead membrane to form a periodic microstructure on the silicon chip. Based on the preparation method of the invention, the black silicon material of the pile face structure can be obtained on the silicon substrate, and can be wildly used in the preparation of a solar cell or photoelectric elements.

Description

【Technical field】 [0001] The invention relates to the field of solar cells, in particular to a preparation technology for black silicon materials used in solar cells. 【Background technique】 [0002] Energy resources such as coal, oil, and natural gas, which are the main energy sources, are constantly being consumed, and the energy situation is not optimistic. As a renewable and clean energy source, solar cells have received great attention in many countries. Silicon-based solar cells occupy 90% of the market, but the cost of crystalline silicon is too high, and the efficiency of amorphous silicon is too low. Black silicon solar cells have broad-spectrum absorption properties, so they have great application prospects for solar cells. [0003] Black silicon material was discovered in the process of reactive ion etching, but it did not cause enough awareness at that time. The black silicon material is a silicon material with a quasi-ordered crystal microstructure formed on t...

AI Technical Summary

Problems solved by technology

In China, several research institutions have begun research on the preparation of black silicon materials, but these methods require laser irradiation

[0004] Although the existing technology has made progress in broad-spectrum absorption, it cannot fully solve the problem of sunlight reflection, which seriously affects the photoelectric conversion efficiency.

Images