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Solar-battery monocrystalline-silicon floss-making fluid with low volatility and application thereof
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A monocrystalline silicon texturing and solar cell technology, applied in circuits, electrical components, climate sustainability, etc., can solve problems such as human hazards, environmental pollution, and volatility, and achieve strong volatility, obvious solubilization, and The effect of reducing volatility
Active Publication Date: 2013-03-06
TIANJIN UNIVERSITY OF TECHNOLOGY
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However, due to the strong volatility of isopropanol, and the higher the temperature, the more volatile it is, it will consume a lot in production, and cause environmental pollution and human harm
At present, other reagents are used instead of isopropanol, but they are not suitable for industrial production
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Embodiment 1
[0034] A kind of texturizing liquid of monocrystalline silicon solar cell with low volatility is used for the texturing of monocrystalline silicon wafer of solar cell, and the steps are as follows:
[0035] 1) First, perform damage removal treatment on the monocrystalline silicon wafer by putting the monocrystalline silicon wafer into a NaOH alkali solution with a concentration of 25% by mass and soaking it at 85°C for 1.5 minutes;
[0036] 2) Prepare the texturing liquid, which is composed of NaOH, cetyltrimethylammonium bromide (CTMAB), sodium silicate, isopropanol (IPA) and water, the mass percentage of each component in the texturing liquid The concentration is: NaOH is 3%, CTMAB is 1%, sodium silicate is 1%, isopropanol is 18%, and the balance is water. Put the above-mentioned monocrystalline silicon wafer into the texturing solution, and The water-bath heating temperature is 83°C for texturing, and the texturing time is 20 minutes;
[0037] 3) Take out the monocrystalli...
Embodiment 2
[0040] A kind of texturizing liquid of monocrystalline silicon solar cell with low volatility is used for the texturing of monocrystalline silicon wafer of solar cell, and the steps are as follows:
[0041] 1) First, perform damage removal treatment on the single crystal silicon wafer, the method is the same as that in Example 1;
[0042] 2) Prepare the velvet liquid, which is composed of potassium hydroxide, cetyltrimethylammonium bromide (CTMAB), sodium silicate, isopropanol (IPA) and water, and the content of each component in the velvet liquid The mass percentage concentration is: potassium hydroxide is 2.5%, CTMAB is 1%, sodium silicate is 1%, isopropanol is 16%, and the balance is water. Put the monocrystalline silicon wafer after the above treatment into the texturing In the liquid, under the condition that the heating temperature of water bath is 80°C, the texturing time is 20 minutes;
[0043] 3) Take out the monocrystalline silicon wafer, wash it with deionized wate...
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Abstract
The invention relates to a solar-battery monocrystalline-silicon floss-making fluid with low volatility, which is formed by mixing sodium hydroxide or potassium hydroxide, CTMAB (Cetyl Tri-Methyl Ammonium Bromide), sodium silicate, isopropanol and water, wherein the mass-percentage concentration of the CTMAB in the floss-making fluid is larger than 0.5 percent. The floss-making fluid is used for the floss making of a solar-battery monocrystalline-silicon piece through the following steps of: 1) firstly implementing damage-removing processing for the monocrystalline-silicon piece; 2) placing the processed monocrystalline-silicon piece into the floss-making fluid, and carrying out floss making under the condition of water-bath heating; and 3) taking out the monocrystalline-silicon piece, and airing after washing with deionized water. The solar-battery monocrystalline-silicon floss-making fluid has the advantages that: when the CTMAB is added to the alkaline floss-making fluid and the concentration is larger than 0.5 percent, the solubilizing action is obvious, the volatility of the isopropanol can be effectively reduced, the usage amount of the isopropanol in the floss-making process is reduced, meanwhile, the surface tension of a solution can be further reduced, and the floss-making speed of solar-battery monocrystalline silicon is increased.
Description
technical field [0001] The invention relates to the preparation technology of monocrystalline silicon solar cells, in particular to a low-volatility monocrystalline silicon texturizing liquid for solar cells and its application. Background technique [0002] With the continuous popularization of solar cell applications, its production process has increasingly received widespread attention. Monocrystalline silicon solar cells have high reliability and long life, and are the mainstream products of photovoltaic cells. Texturing on the surface of monocrystalline silicon substrates can reduce the surface reflectance of solar cells and increase the light absorption rate of solar cells, thereby improving their photoelectric conversion efficiency. It is one of the main research directions of monocrystalline silicon solar cells. Single crystal silicon wafers are anisotropic when they are etched in an alkaline solution with a certain concentration range, and the corrosion rate of dif...
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