Preparation method of solar cell and solar cell

A technology of solar cells and electrodes, applied in the field of solar photovoltaics, can solve the problems of complicated etching solution operation, affecting the quality of finished products, and low alignment accuracy, and achieve the effects of fast processing speed, large pollution, and high precision

Pending Publication Date: 2022-07-29
LONGI SOLAR TECH (XIAN) CO LTD
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Problems solved by technology

[0003] At present, photolithography, screen printing, masking, masking and other processes are usually used to prepare two kinds of interdigitated collection layers on the back of the HBC battery. Most processes require at least two placement of masks, or at least

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  • Preparation method of solar cell and solar cell
  • Preparation method of solar cell and solar cell
  • Preparation method of solar cell and solar cell

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[0055]The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0056] refer to figure 1 , figure 1 One of the flow charts of the preparation method of the solar cell provided by the embodiment of the present invention is shown, such as figure 1 As shown, the method can include:

[0057] Step 101 , providing a silicon substrate, where the silicon substrate includes a back surface on which electrodes are provided, and a front surface opposite to the back surface.

[0058] In the embodiment of the presen...

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Abstract

The invention provides a preparation method of a solar cell and the solar cell, and relates to the technical field of solar photovoltaics. According to the method, one-time wet etching and multiple times of laser ablation are adopted in the process of conducting emitting electrode and back surface field patterning on the back face of the silicon substrate, the laser ablation technology is high in machining speed, high in precision, low in cost and small in pollution, and therefore the number of times of wet etching which is tedious in implementation operation, high in cost and large in pollution is reduced, and the yield of the silicon substrate is improved. By adopting laser ablation, the process can be effectively simplified, the cost can be reduced, the patterning precision can be improved, the damage can be reduced, and the finished product quality of the HBC battery can be improved.

Description

technical field [0001] The present invention relates to the technical field of solar photovoltaic, in particular to a preparation method of a solar cell and a solar cell. Background technique [0002] Silicon Hetero-Junction (SHJ) cells are prepared by depositing intrinsic hydrogenated amorphous silicon on the surface of crystalline silicon to passivate surface defects, and then depositing doped hydrogenated amorphous silicon films. junction, SHJ cells have symmetrical structure, high open circuit voltage, low process temperature, good temperature characteristics, stable illumination and high bifacial ratio. Further, in order to improve the short-circuit current of the SHJ battery, a back-contact heterojunction (HBC) battery can be used. The HBC battery adopts an interdigital arrangement on the back side and an electron collection layer and a hole collection layer are arranged at the same time, so that the two types of collection layers are arranged. The layers are arranged...

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Application Information

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IPC IPC(8): H01L31/18H01L31/20H01L31/068H01L31/0747
CPCH01L31/1804H01L31/1868H01L31/0682H01L31/0747H01L31/202H01L31/208
Inventor 孙召清唐喜颜周生厚邓小玉方亮曲铭浩
Owner LONGI SOLAR TECH (XIAN) CO LTD
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