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Method for preparing polysilicon solar battery suede in magnetic field

A technology of solar cells and polysilicon, which is applied in the manufacture of circuits, electrical components, and final products, and can solve problems such as the absence of polysilicon solar cells

Inactive Publication Date: 2009-02-18
张根发
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, the technology of preparing high-efficiency textured surface of polycrystalline silicon solar cells through the magnetization effect of strong magnetic field has not yet appeared.

Method used

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  • Method for preparing polysilicon solar battery suede in magnetic field
  • Method for preparing polysilicon solar battery suede in magnetic field

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Embodiment Construction

[0017] 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 sodium hydroxide or potassium hydroxide, and polycrystalline silicon wafers. It adopts the texturing tank with computer precise control heater. 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 sodium hydroxide or potassium hydroxide, ethanol or isopropanol, and sodium silicate are added. Wherein the mass percent of sodium hydroxide or potassium hydroxide in the reaction solution remains at 0.05% to 15%, the mass percent of ethanol or isopropanol in the reaction solution remains at 5% to 25%, and sodium silicate in the reaction solution The mass percentage of the solution is kept at 0.05% to 3%, the temperature of the solution is kept a...

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Abstract

The invention discloses a preparation method of high efficient textures of a polycrystalline silicon solar cell in a magnetic field. The preparation method comprises the following processing steps: firstly, putting a polycrystalline silicon chip into a texture preparation reactor with prepared reaction liquids to react, placing the texture preparation reactor in the magnetic field, wherein, the mixture ratio of the reaction liquids is that: sodium hydroxide or potassium hydroxide is 0.05 to 15 weight percent, ethanol or isopropyl alcohol is 5 to 25 weight percent, and sodium silicate is 0.05 to 3 weight percent, the temperature of the reaction liquids is kept at 65 to 90 DEG C; secondarily, after the polycrystalline silicon chip finishes reacting in the alkali solution, washing for 5 to 10 minutes in the 0.5 to 5 percent of hydrofluoric acid solution at the normal temperature; finally, in the whole step of preparing the polycrystalline silicon solar cell texture in the magnetic field, the magnetic field strength is kept at 0 to 10T, and the texture preparation time is 10 to 45 minutes.

Description

Technical field: [0001] The invention relates to a preparation technology for a suede surface of a high-efficiency polycrystalline silicon solar cell under a magnetic field, and belongs to the technical field of inorganic materials. Background technique: [0002] Energy crisis and environmental pollution are major challenges to building a harmonious society and sustainable development. It is very urgent to develop new energy and make renewable energy an important part of my country's future energy. As a sustainable and clean energy, solar energy has great potential for development and utilization. The natural resources that human beings depend on are almost all converted to solar energy, and the direct conversion of solar energy into electrical energy is an important technical basis for modern large-scale utilization of solar energy. Since Bell Laboratories developed the first crystalline silicon solar cell with an efficiency of 6% in 1954, the solar cell market has been in...

Claims

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Application Information

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IPC IPC(8): H01L31/18H01L21/306C23F1/10C23F1/40
CPCY02P70/50
Inventor 苏青峰
Owner 张根发
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