Environment-friendly monocrystalline silicon texturing additive and preparation process thereof, monocrystalline silicon texturing liquid and texturing method
A technology of monocrystalline silicon texturing and crystalline silicon texturing, which is applied in sustainable manufacturing/processing, single crystal growth, single crystal growth, etc., can solve the problems of small chemical oxygen demand, low cost of waste liquid treatment, Oxygen content is high, to achieve the effects of timely desorption of air bubbles, controllable suede size, and less volatilization
Inactive Publication Date: 2020-09-11
杭州聚力氢能科技有限公司
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] The present invention aims at the short service life of the texturing agent in the prior art, the large volatilization amount, the large supplementary amount, the high chemical oxygen demand value of the waste liquid, which is not conducive to the protection of the environment, and the textured surface has a high reflectivity after making the texturing, etc. Disadvantages, provide an environment-friendly monocrystalline silicon texturing additive and its preparation process, monocrystalline silicon texturing liquid and texturing method, using the texturing additive and texturing liquid prepared by this process can quickly realize the desorption of air bubbles , and can inhibit the reaction rate and form a stable textured structure of monocrystalline silicon pyramids. At the same time, the textured additive and texturing liquid are non-toxic, non-irritating, and non-flammable, and have little environmental pollution. Small oxygen value, low cost of waste liquid treatment
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0034] Preparation of texturing additives: Weigh the following raw materials in order by weight: 0.075% sodium lignosulfonate, 0.075% polyacrylic acid, 0.0075% sodium methylene bis-naphthalene sulfonate, 0.0075% polyethylene glycol, L-cysteine Amino acid 0.01%, water 99.8%. Mix the weighed raw materials according to the following steps:
[0035] Step (1): adding the weighed sodium lignosulfonate into water to dissolve to obtain component A;
[0036] Step (2): adding the weighed polyacrylic acid into water to dissolve to obtain component B;
[0037] Step (3): adding the weighed sodium methylene bis-naphthalene sulfonate into water to dissolve to obtain component C;
[0038] Step (4): adding the weighed polyethylene glycol into water to dissolve to obtain component D;
[0039] Step (5): Put the weighed L-cysteine into a three-necked flask, add four components A, B, C, and D in sequence, and finally add water for quantification. Under the conditions of 25°C and 1200r / min St...
Embodiment 1a
[0045] In Example 1a, the surface texturing temperature of monocrystalline silicon is 80° C., the texturing time is 1200 s, and other parameters are the same as in Example 1.
Embodiment 1b
[0047] The concentration of sodium hydroxide solution in Example 1b is 1.6%, the mass ratio of texturing additive to alkali solution is 1.1:99.9, and other parameters are the same as in Example 1.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to the technical field of monocrystalline silicon wafer texturing agents, and discloses an environment-friendly monocrystalline silicon texturing additive and a preparation process thereof. The environment-friendly monocrystalline silicon texturing additive is prepared from the following components by weight percentage: 0.01-0.5% of sodium lignin sulfonate, 0.02-1.2% of polyacrylic acid, 0.0001-0.01% of sodium methylenedinaphthalene disulphonate, 0.001-0.01% of polyethylene glycol, 0.01-2% of L-cysteine and 96-99% of water. The invention also discloses a monocrystalline silicon texturing liquid, which is prepared by adding the texturing additive into a 1%-2% sodium hydroxide or potassium hydroxide solution and uniformly mixing the substances at a temperature of 20-80DEG C. The invention also discloses a monocrystalline silicon surface texturing method, which comprises the following steps of: immersing a pretreated monocrystalline silicon wafer into the texturing agent for texturing at a texturing temperature of 70-90DEG C for 300-1200s. The texturing liquid disclosed by the invention is long in service life, small in volatilization amount, small in supplementing amount, and extremely low in chemical substance dosage, the texturing liquid and waste liquid thereof are light in color, the chemical oxygen demand is extremely low, and the environmental pollution is low, and meanwhile, the production cost is also reduced. In the texturing process, bubbles are desorbed in time, wafer skip or needle point forming cannot happen, textured nucleation is uniform,and the pyramid coverage degree is high.
Description
technical field [0001] The invention relates to the technical field of monocrystalline silicon chip texturing agents, in particular to an environment-friendly monocrystalline silicon texturing additive and a preparation process thereof, a monocrystalline silicon texturing liquid and a texturing method. Background technique [0002] With the advancement of science and technology, energy problems are constantly being solved and improved. In recent years, with the support of the country and the government, the solar photovoltaic industry has developed rapidly. However, the problems that restrict its further development are how to improve the photoelectric conversion efficiency of solar cells, reduce production costs, and how to use more environmentally friendly chemical reagents Texturing. [0003] The corrosion of monocrystalline silicon wafers in an alkaline solution with a certain concentration range is anisotropic (the corrosion to the (100) crystal plane is faster, and th...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): C30B33/10C30B29/06H01L31/0236H01L31/18
CPCC30B29/06C30B33/10H01L31/02363H01L31/1804Y02P70/50
Inventor 李然范云堂程寒松闫缓
Owner 杭州聚力氢能科技有限公司