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Polycrystalline silicon fuzzing process by acid method

A kind of technology, silicic acid technology, applied in the field of polycrystalline silicic acid method texturing technology, can solve the problems of reducing reflectivity, the effect is not obvious, etc., to achieve the effect of reducing reflectivity and improving efficiency

Active Publication Date: 2011-09-07
TRINA SOLAR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, solar energy is widely used, especially the application of solar cells. Most of the existing solar cells are polycrystalline silicon solar cells. Due to the crystal orientation of polycrystalline silicon, the traditional method is to directly soak the original silicon wafer in hydrofluoric acid and The mixed solution of nitric acid is used to make texture, which belongs to isotropic corrosion, and the effect on reducing reflectivity is not obvious

Method used

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Embodiment Construction

[0008] The present invention will now be described in further detail in conjunction with the accompanying drawings and preferred embodiments. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

[0009] The polycrystalline silicic acid texturing process of the best implementation mode has the following processes

[0010] (1) Spraying silicon dioxide or photoresist protection particles on the surface of the silicon wafer;

[0011] (2) Carrying out texturing The silicon wafer is placed in a mixed solution of hydrofluoric acid and nitric acid for texturing, and the particles sprayed on the surface of the silicon wafer serve as an etching protective layer.

[0012] According to the specific situation, select the spraying method, the distance between the nozzle and the silicon wafer, the flow rate of the sprayed substanc...

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Abstract

The invention relates to the producing field of solar batteries, in particular to a Polycrystalline silicon fuzzing process of solar batteries by an acid method, comprising the following steps: (1) spraying, spraying silicon dioxide or photoresist protection grains on the surface of a silicon slice; (2) fuzzing, putting the silicon slice in the mixed solution of hydrofluoric acid and nitric acid for fuzzing, wherein the grains sprayed on the surface of the silicon slice are used as a protection layer of etching. The invention has the advantages of lowering the reflectivity of the silicon slice, but improving the efficiency.

Description

technical field [0001] The invention relates to the field of making solar cells, in particular to the polycrystalline silicic acid texturing process of solar cells. Background technique [0002] At present, solar energy is widely used, especially the application of solar cells. Most of the existing solar cells are polycrystalline silicon solar cells. Due to the crystal orientation of polycrystalline silicon, the traditional method is to directly soak the original silicon wafer in hydrofluoric acid and The mixed solution of nitric acid is used to make texture, which belongs to isotropic corrosion, and the effect on reducing the reflectivity is not obvious. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a polycrystalline silicic acid texturing process in order to solve the above-mentioned shortcomings and deficiencies. [0004] The technical solution adopted by the present invention to solve its technical problem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F1/02C30B33/10C23F1/24
Inventor 张学玲
Owner TRINA SOLAR CO LTD