A kind of monocrystalline silicon texturizing agent and the preparation method of textured monocrystalline silicon

A monocrystalline silicon texturing agent and crystal silicon texturing agent technology, which is applied in chemical instruments and methods, crystal growth, final product manufacturing, etc., can solve the problem of uneven pyramid-shaped textured surface and low pass rate of monocrystalline silicon textured surface and other issues, to achieve the effect of improving short-circuit current and conversion efficiency, improving pass rate, and reducing bright spots

Active Publication Date: 2016-01-27
JETION SOLAR HLDG
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  • Application Information

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Problems solved by technology

But the pyramid-shaped textured surface of the textured monocrystalline silicon obtained by adopting this texture-making agent comprising sodium hydroxide, isopropanol and the above-mentioned additives is not uniform, causing the qualified rate of the monocrystalline silicon textured surface to be low

Method used

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  • A kind of monocrystalline silicon texturizing agent and the preparation method of textured monocrystalline silicon
  • A kind of monocrystalline silicon texturizing agent and the preparation method of textured monocrystalline silicon
  • A kind of monocrystalline silicon texturizing agent and the preparation method of textured monocrystalline silicon

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preparation example Construction

[0042]The preparation method of the corrosive agent is not particularly limited in the present invention. The urea aqueous solution described in the above technical solution may be prepared first, and then sodium lactate is added to the urea aqueous solution to obtain the corrosive agent.

[0043] The preparation method of the corrosive agent can also first prepare the sodium lactate aqueous solution described in the above technical solution, and then add urea to the sodium lactate aqueous solution to obtain the corrosive agent.

[0044] The preparation method of the corrosive agent can also firstly mix urea and sodium lactate to obtain a mixture of urea and sodium lactate; then add water to the mixture of urea and sodium lactate to obtain the corrosive agent described in the above technical solution.

[0045] After obtaining the corrosive agent, the present invention preferably mixes the basic compound in the above technical scheme with the corrosive agent to obtain a mixture ...

Embodiment 1

[0062] 200mL of water was added to 22.2g of urea to obtain a urea solution with a mass concentration of 10%, and then 6.87g of sodium lactate was added thereto to obtain a corrosive agent, wherein the mass concentration of sodium lactate was 3%. Take 4.5g of sodium hydroxide and 26.7mL of the above corrosive agent, add 200mL of water to it to obtain a texturing agent, wherein the mass concentration of sodium hydroxide is 2%, and the total mass concentration of urea and sodium lactate in the corrosive agent is 1.5%.

Embodiment 2

[0066] 200 mL of water was added to 10.5 g of sodium lactate to obtain a sodium lactate solution with a mass concentration of 5%, and then 28.7 g of urea was added thereto to obtain a corrosive agent, wherein the mass concentration of urea was 12%. Take 5.85g of sodium hydroxide and 24.38mL of the above-mentioned corrosive agent, and add 200mL of water to it to obtain a texturing agent, wherein the mass concentration of sodium hydroxide is 2.5%, and the total mass concentration of urea and sodium lactate in the corrosive agent is 1.8%.

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Abstract

The invention provides a monocrystalline silicon texturing agent, comprising an alkaline compound and a corrodent; wherein the corrodent includes the following components: 5wt%-20wt% of urea, 1wt%-10wt% of sodium lactate, and the balance water. The texture monocrystalline silicon is prepared by placing monocrystalline silicon into the texturing agent provided by the present invention and heating. The urea in the monocrystalline silicon texturing agent can hydrolyze to produce ammonia and carbon dioxide, being conducive to the smooth overflow of gases generated during texturing process, and preventing the effects of gas on texture quality. The corrodent of the present invention can effectively control the etching rate of the alkali compound for the silicon surface, and also has a strong decontamination capacity, therefore the texturing agent provided by the present invention can effectively reduce the probability of appearing bright pieces, hickies and rain drops, so that the pyramid type suede is small and uniform, and the qualified rate of suede monocrystalline silicon has been markedly improved.

Description

technical field [0001] The invention relates to the technical field of monocrystalline silicon texturing, in particular to a monocrystalline silicon texturing agent and a method for preparing textured monocrystalline silicon. Background technique [0002] Under the background of energy crisis, renewable energy sources such as solar energy are paid more and more attention by people. Solar energy is not only a primary energy source, but also a renewable energy source. It is rich in resources, does not need transportation, and has no pollution to the environment. It has created a new form of life for human beings and brought society into an era of energy conservation and less pollution. . In terms of the utilization of solar energy, the research and development of solar cells has been highly valued by people, and monocrystalline silicon solar cells have attracted much attention due to their relatively high efficiency and low cost. [0003] One of the important links in the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B33/10C23F1/32H01L31/18
CPCY02P70/50
Inventor 汪琴霞
Owner JETION SOLAR HLDG
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