A processing technology for preparing solar cells by cutting silicon wafers with diamond wire

Abstract

The invention discloses a processing technology for preparing battery slices by cutting silicon wafers with diamond wires. The polycrystalline silicon slices obtained by diamond wire cutting are selected as substrates, and the substrates are sequentially put into nitric acid and hydrofluoric acid for cleaning and polishing, and the substrates are removed. Surface damage layer; then prepare a photolithographic mask layer on the front surface of the substrate, and then make texturing by steam texturing, and then pass POCL on the front surface of the substrate 3 The P-N junction is prepared by the thermal diffusion method of the liquid diffusion source, and finally wet-etched on the front surface of the substrate, coated with an anti-reflection film, printed and sintered to obtain a finished product; the invention discloses a method for preparing a cell by diamond wire cutting silicon The processing technology is reasonable, the process design is reasonable, the operation is simple and controllable, and the silicon wafer cut by diamond wire is used as the substrate for processing, and the solar cell with excellent electrical performance is prepared, thereby improving the open circuit voltage, short circuit current and fill factor of the solar cell, and improving Conversion efficiency, to achieve the purpose of cost reduction and efficiency improvement, has high practicability.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a processing technology for preparing solar cells by cutting silicon chips with diamond wires. Background technique [0002] At present, the research and development of new energy mainly focus on renewable energy such as solar energy, wind energy, and geothermal energy. Due to the abundant and widely distributed solar energy resources, it is the new energy with the most development potential. Today, with the development of modern production, fossil fuels such as oil, coal, and natural gas cannot meet the energy demand for development, and the extensive use of fossil energy has led to global warming and frequent natural disasters. Due to its advantages of convenience, safety and reliability, and sufficient resources, solar energy has become a new type of industry supported and developed by countries all over the world. [0003] Although crystalline silicon solar cells have de...

AI Technical Summary

Problems solved by technology

[0003] Although crystalline silicon solar cells have developed greatly in recent years, and the introduction of many new technologies has greatly improved the efficiency of crystalline silicon solar cells, the relatively high production cost is still the limit for the current development of the crystalline silicon cell industry. The biggest restrictive factor, so the research and development of efficient and cheap solar cells is the subject of the photovoltaic industry in all countries in the world.