Manufacturing method of solar cell
A technology of solar cells and manufacturing methods, applied in the field of solar cells, can solve problems such as the reduction of photoelectric conversion efficiency of solar cells, and achieve the effects of improving photoelectric conversion efficiency, reducing defects, and reducing the probability of recombination
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Embodiment 1
[0034] refer to Figure 1-Figure 3 , the present embodiment provides a method for manufacturing a solar cell, the method of the present embodiment is suitable for tank cleaning, comprising the following steps:
[0035] S100 : Forming the raw solar battery sheet 100 .
[0036] S200 : Divide the raw solar cell 100 to form at least two sliced solar cells 200 .
[0037] S300: Using a wet cleaning process to clean at least the split surface A of the sliced solar cell 200 .
[0038] S400: After the wet cleaning process is performed, grid line electrodes are formed on the surface of the sliced solar cells 200 .
[0039] In the method for manufacturing solar cells in this embodiment, the sliced solar cell 200 formed by dividing the original solar cell 100 is wet-cleaned to treat the first transparent conductive layer 107 formed when the original solar cell 100 is divided. The remaining fragments and repair the split surface, reduce the defects on the split surface A, and re...
Embodiment 2
[0073] refer to Figure 1-Figure 3 , this embodiment provides a method for manufacturing solar cells, the method of this embodiment is also applicable to tank cleaning, the difference from the above embodiment 1 is that cleaning solution B is a mixed solution of hydrofluoric acid, hydrochloric acid and ozone; Alternatively, the cleaning solution is a mixed solution of hydrofluoric acid and hydrochloric acid;
[0074] In the cleaning liquid, the mass percentage concentration of hydrogen fluoride is 2%-5%, and the mass percentage concentration of hydrogen chloride is 2%-5%; the temperature of the cleaning liquid is 20°C-25°C;
[0075] When the cleaning solution is a mixed solution of hydrofluoric acid, hydrochloric acid and ozone, the mass concentration of ozone in the cleaning solution is 30PPM-100PPM;
[0076] The duration of soaking treatment is 120s-600s.
[0077] The rest of the cleaning conditions are the same as those in Example 1, and will not be repeated here.
[007...
Embodiment 3
[0080] refer to figure 1 with Figure 4 , this embodiment provides a method for manufacturing solar cells, the difference from the above-mentioned embodiment 1 is that the method of this embodiment is suitable for chain cleaning, and the steps of cleaning sliced solar cells 200 using a wet cleaning process include:
[0081] Provide a cleaning solution; specifically: provide a cleaning device, the cleaning device has a cleaning solution tank, and the cleaning solution tank contains a cleaning solution D. The cleaning device has an automatic control structure, which can conveniently realize the control of the cleaning time, cleaning temperature and concentration of the cleaning solution.
[0082] The side wall of the sliced solar cell sheet 200 includes a split plane C, and the split plane C is perpendicular to the liquid surface of the cleaning solution D (refer to Figure 4 Immerse at least part of the sliced solar cells 200 in the cleaning solution D in the direction ...
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Abstract
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Application Information
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