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Mixed solution of carbonate and caustic alkali for preparing monocrystal silicon suede

A mixed solution and carbonate technology, applied in the mixed solution of carbonate and caustic, the production of single crystal silicon solar cells, the preparation of suede, can solve the problem of uneven size of pyramids, color difference of silicon wafers, etc. Achieve the effect of good surface consistency, uniformity and low cost of silicon wafers

Inactive Publication Date: 2010-01-06
EOPLLY NEW ENERGY TECH
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Problems solved by technology

[0004] The purpose of this invention is to provide a kind of carbonate and the caustic alkali mixed solution that is used for the preparation of monocrystalline silicon textured surface, it can solve the pyramid size inhomogeneous, silicon chip that existing single crystal silicon texturizing corrosion solution causes. There are defects such as color difference on the surface

Method used

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Embodiment Construction

[0012] This specific embodiment adopts the following technical solutions: 1500g sodium carbonate (Na 2 CO 3 ), 240g of sodium hydroxide (NaOH), and 1500mL of isopropanol were added to 30L of deionized water, stirred thoroughly, mixed evenly, and added to 80°C. Then put the monocrystalline silicon chip that is 125mm * 125mm into the solution and corrode after cutting, without the suede surface, and the area is 25 minutes. ) is about 0.5g. The obtained textured pyramids are uniform in size and the surface of the silicon wafer is consistent.

[0013] Take every 50 silicon wafers as a batch, and add them to the above solution for etching and texturing. After the etching of each batch of silicon wafers, before etching and texturing the next batch of silicon wafers, it is necessary to add 25g of hydrogen to the etching solution. sodium oxide and 200 mL of isopropanol. In this embodiment, 16 batches of silicon wafers were etched continuously, and the above-mentioned textured sili...

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Abstract

The invention provides a mixed solution of carbonate and caustic alkali for preparing monocrystal silicon suede, relating to the technical field of preparation of solar cells, in particular to the preparation of the suede in manufacturing technique of monocrystal line silicon solar cells. The formulation comprises the components of carbonate, caustic alkali and isopropanol. When the etchant solution of the invention is used for preparing the monocrystal line silicon suede, reaction can be controlled easily, the pyramid uniformity of the prepared suede is good, and the surface consistency of silicon chip is good. Moreover, when the etchant solution of the invention is used for preparing the monocrystal line silicon suede, the invention has the characteristics of low cost and easy operation, can be applied to large-scale industrial production, and has favorable practical value.

Description

Technical field: [0001] The invention relates to the technical field of solar cell preparation, in particular to the preparation of textured surfaces in the production technology of single crystal silicon solar cells. In particular, it relates to a mixed solution of carbonate and caustic alkali used for the preparation of monocrystalline silicon texture. Background technique: [0002] Since the advent of solar cells, improving the photoelectric conversion efficiency of solar cells has been the goal pursued by scientists and engineers. Improving the electrical properties of solar cells and increasing their ability to absorb light are two main directions for improving their photoelectric conversion efficiency. The preparation of the textured surface is one of the main means to reduce the light reflection on the surface of the single crystal silicon wafer and increase the light absorption. The mechanism of the single crystal silicon textured surface reducing the light reflect...

Claims

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Application Information

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IPC IPC(8): C23F1/40C30B33/10H01L31/18
Inventor 屈盛韩增华余银祥
Owner EOPLLY NEW ENERGY TECH
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