Method for preparing silicon solar battery pile face in magnetic field

A technology of silicon solar cells and suede, applied in the manufacture of circuits, electrical components, final products, etc.

Inactive Publication Date: 2009-04-15
张根发
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Problems solved by technology

The technology of preparing high-efficiency textured surface of polycrystalline silicon solar cells i

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  • Method for preparing silicon solar battery pile face in magnetic field

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Embodiment Construction

[0019] The invention adopts the technique of preparing polycrystalline silicon solar cell suede surface under magnetic field, so as to prepare high-quality and uniform suede surface. The raw materials are electronically pure nitric acid or chromic acid, electronically pure hydrofluoric acid, electronically pure phosphoric acid or acetic acid, polysilicon wafers, electronically pure sodium hydroxide, and a texturing tank with a computer-controlled cooler.

[0020] First, a certain amount of deionized water is passed into the suede preparation reactor, which is just above the height of the silicon wafer, and then a certain amount of nitric acid or chromic acid, hydrofluoric acid, phosphoric acid or acetic acid is added. Wherein the mass percent of nitric acid or chromic acid in the reaction solution remains at 0.05% to 15%, the mass percent of hydrofluoric acid in the reaction solution remains at 1% to 30%, and the mass percent of phosphoric acid or acetic acid in the reaction so...

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Abstract

The invention discloses a method for preparing a texture of a silicon solar cell under a magnetic field. The method comprises the following technological steps: firstly, a polysilicon wafer is put into a texture preparation reactor with prepared acid reaction solution for reaction, and the texture preparation reactor is put in the magnetic field, wherein, the reaction solution is made from 0.05%-15% of nitric acid or chromic acid by mass, 1%-30% of hydrofluoric acid by mass and 1%-30% of phosphoric acid or acetic acid by mass; the temperature of the reaction solution is kept at 0-30 DEG C, and the polysilicon wafer is washed in 0.5%-3% sodium hydroxide solution for 1-5 minutes after reaction in the acid solution; secondly, the magnetic field is applied in the whole course of preparing the texture of the silicon solar cell, the magnetic field strength is kept at 0-10T, and the texture preparation time is 1-45 minutes. A compact and even texture can be grown on the surface of the polysilicon wafer by the method, thus realizing the high-efficiency and even production of the silicon solar cell texture by acid oxidants under the magnetic field.

Description

Technical field: [0001] The invention relates to a method for preparing a high-efficiency suede surface of a silicon solar cell in an acidic solution under a magnetic field, and belongs to the technical field of inorganic materials. Background technique: [0002] Solar energy is a clean, non-polluting, inexhaustible natural energy source. Almost all natural resources on which human beings depend are converted to solar energy. Direct conversion of solar energy into electrical energy is an important technology for large-scale utilization of solar energy. Base. Since Bell Laboratories developed the first polysilicon solar cell with an efficiency of 6% in 1954, the solar cell market has been increasing at a rate of 35% per year, of which the market share of polysilicon solar cells is more than 50%. Batteries are cheap and their market share has climbed in recent years. In just half a century, solar cells have completed the research on the first generation of crystalline silico...

Claims

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Application Information

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IPC IPC(8): H01L31/18H01L21/00H01L21/02H01L21/306C23F1/24
CPCY02P70/50
Inventor 张根发苏青峰韩新江杨文平
Owner 张根发
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