CN106012028A - Single crystalline silicon solar cell piece surface texture solution containing peach gum and preparation method thereof - Google Patents

Abstract

The invention discloses a single crystalline silicon solar cell piece surface texture solution containing peach gum. The single crystalline silicon solar cell piece surface texture solution is prepared from, by weight, 0.05-0.1 part of peach gum, 0.1-0.15 part of sodium dioctylsulfosuccinate, 1.5-2.5 parts of styrene, 1-2 parts of a 5-10% ammonium persulfate solution, 0.1-0.2 part of sodium lauryl sulfate, 0.1-0.15 part of dodecafluoroheptyl-propyl-trimethoxysilane, 0.5-1 part of polyethylene glycol, 3-5 parts of sodium hydroxide, 0.3-0.5 part of citric acid, 0.1-0.2 part of sodium tripolyphosphate and 100-120 parts of water. The silicon slice texture solution is high in reaction speed, moderate in corrosion, small in thickness reduction and high in repeated utilization factor, the obtained texture pyramid is uniform in size, granules are small, and the technological stability and consistency are improved.

Description

A kind of surface texture liquid of monocrystalline silicon solar cells containing peach gum and preparation method thereof

technical field

The invention relates to the technical field of solar cells, in particular to a single-crystal silicon solar cell surface texture liquid containing peach gum and a preparation method thereof.

Background technique

As the world's energy crisis becomes more serious, solar energy has become the most potential alternative energy source, and a solar cell is an electronic component that directly converts solar energy into electrical energy. The main problem hindering the development of solar cell technology is its high manufacturing cost. At present, in order to reduce the cost of monocrystalline silicon solar cells and improve the photoelectric conversion efficiency, silicon surface texturing is the easiest and most efficient method. Texture, also known as velvet, uses the principle of light trapping to make the incident light reflect multiple times to prolong its propagation path on the surface of the battery, thereby improving the light absorption efficiency of solar cells. Using the principle of anisotropic etching of silicon, a pyramid-like structure can be formed on the surface of single crystal silicon, effectively reducing the reflectivity of sunlight.

At present, chemical etching is the most commonly used method for surface texturing of monocrystalline silicon. The commonly used texturing solution is NaOH/isopropanol system. However, isopropanol is expensive, volatilizes quickly, costs high and is not conducive to environmental protection. Patent 201010161287.8 discloses a monocrystalline silicon additive texturing solution, which is composed of alkaline corrosion solution, surfactant and organic acid or salt, does not contain isopropanol and is fast and efficient, but it has the problem of poor uniformity of reaction, which is easy to cause After texturing, the pyramids on the silicon surface are too large and local over-corrosion, etc., still need to be further improved in the quality of the silicon wafer.

Contents of the invention

The purpose of the present invention is to make up for the defects of the prior art, and to provide a surface texture of a single crystal silicon solar cell containing peach gum with fast reaction speed, good uniformity, moderate corrosion, small thinning, and high surface quality of silicon wafers. liquid and its preparation method.

The present invention is achieved through the following technical solutions:

A kind of monocrystalline silicon solar cell sheet surface texturing liquid containing peach gum, it is made by the raw material of following weight part:

Peach gum 0.05-0.1, dioctyl sodium sulfosuccinate 0.1-0.15, styrene 1.5-2.5, 5-10% ammonium persulfate solution 1-2, sodium lauryl sulfate 0.1-0.2, dodecafluoroheptyl Propyl trimethoxysilane 0.1-0.15, polyethylene glycol 0.5-1, sodium hydroxide 3-5, citric acid 0.3-0.5, sodium tripolyphosphate 0.1-0.2, water 100-120.

A preparation method for a surface texture liquid of single crystal silicon solar cells containing peach gum, comprising the following steps:

(1) Weigh the raw materials by weight, first add sodium lauryl sulfate to 1/3-1/2 weight of water and stir evenly, then slowly add the mixture of styrene and dodecafluoroheptylpropyltrimethoxysilane And stir for 0.5-1h, finally slowly add ammonium persulfate solution dropwise and stir at 70-80°C for 2-4h, keep warm for 3-5h and then cool to obtain a composite emulsion;

(2) Add sodium hydroxide and citric acid to the rest of the water and stir until they are completely dissolved, then add peach gum and dioctyl sodium sulfosuccinate and stir for 3-5 hours at 80-90°C, and finally add the rest of the raw materials and stir evenly. get the mixture;

(3) Slowly add the composite emulsion in step (1) into the mixed liquid in step (2) and stir evenly at 60-80°C, filter to remove impurities and obtain the surface texture of single crystal silicon solar cells containing peach gum. Constructed fluid.

The advantages of the present invention are:

The invention utilizes styrene and dodecafluoroheptylpropyltrimethoxysilane emulsion polymerization to synthesize composite microspheres, which can be well attached to the surface of silicon wafers and play a certain corrosion mask effect, which can not only reduce excessive corrosion of silicon wafers , at the same time improve the uniformity of the reaction, improve the quality of the suede surface, and it is not easy to remain on the surface of the silicon wafer, ensuring the cleanliness of the silicon wafer; at the same time, through the compounding and synergistic effect of raw materials such as peach gum, the obtained silicon wafer texture The liquid reaction speed is fast, the corrosion is moderate, the amount of thinning is small, and the recycling rate is high. The prepared suede pyramid has a uniform size and small particles, and the stability and consistency of the process are improved.

detailed description

A kind of monocrystalline silicon solar cell sheet surface texturing liquid containing peach gum, is prepared from the component raw material of following weight (kg):

Peach gum 0.05, dioctyl sulfosuccinate sodium 0.1, styrene 1.5, 5% ammonium persulfate solution 1, sodium lauryl sulfate 0.1, dodecafluoroheptylpropyltrimethoxysilane 0.1, polyethylene glycol Alcohol 0.5, sodium hydroxide 3, citric acid 0.3, sodium tripolyphosphate 0.1, water 100.

A preparation method for a surface texture liquid of single crystal silicon solar cells containing peach gum, comprising the following steps:

(1) Weigh raw materials by weight, first add sodium lauryl sulfate to 1/3 weight of water and stir evenly, then slowly add the mixture of styrene and dodecafluoroheptylpropyltrimethoxysilane and stir for 0.5h , and finally slowly add ammonium persulfate solution dropwise and stir at 70°C for 2 hours, keep warm for 3 hours and then cool to obtain a composite emulsion;

(2) Add sodium hydroxide and citric acid to the rest of the water and stir until completely dissolved, then add peach gum and dioctyl sodium sulfosuccinate and stir at 80°C for 3 hours, and finally add the rest of the raw materials and stir evenly to obtain a mixed solution;

(3) Slowly add the composite emulsion in step (1) to the mixed solution in step (2) and stir evenly at 60°C, filter to remove impurities to obtain the surface texture liquid of single crystal silicon solar cells containing peach gum .

After inspection, the above-mentioned texture liquid can prepare a uniform small-sized pyramid structure on the surface of a silicon wafer under the condition of 80°C and 20 minutes. , the amount of silicon wafers etched away is about 4.5%.

Claims (2)

1. the monocrystaline silicon solar cell sheet surface texture liquid containing Resina persicae, it is characterised in that it is to be prepared by the raw material of following weight parts:

Resina persicae 0.05-0.1, dioctyl sodium sulfosuccinate 0.1-0.15, styrene 1.5-2.5,5-10% ammonium persulfate solution 1-2, sodium lauryl sulphate 0.1-0.2, ten difluoro heptyl propyl trimethoxy silicane 0.1-0.15, Polyethylene Glycol 0.5-1, sodium hydroxide 3-5, citric acid 0.3-0.5, sodium tripolyphosphate 0.1-0.2, water 100-120.

The preparation method of a kind of monocrystaline silicon solar cell sheet surface texture liquid containing Resina persicae the most according to claim 1, it is characterised in that comprise the following steps:

(1) raw material is weighed by weight, first sodium lauryl sulphate is added in the water of 1/3-1/2 weight and stir, it is then slowly added into styrene and the mixture of ten difluoro heptyl propyl trimethoxy silicanes and stirs 0.5-1h, finally it is slowly added dropwise ammonium persulfate solution and stirs 2-4h in 70-80 DEG C, cool down after insulation 3-5h, obtain complex emulsions；

(2) sodium hydroxide and citric acid first add stirring in the water of surplus, until being completely dissolved, be subsequently adding Resina persicae and dioctyl sodium sulfosuccinate 80-90 DEG C stirring 3-5h, be eventually adding remaining raw material stirring uniform, obtain mixed liquor；

(3) it is slowly added to the complex emulsions in step (1) stir in the mixed liquor in step (2) and in 60-80 DEG C, after being filtered to remove impurity, i.e. obtains the monocrystaline silicon solar cell sheet surface texture liquid containing Resina persicae.