Preparation method of solar cell, solar cell and photovoltaic module
A technology of solar cells and photovoltaic modules, applied in the field of solar cells, can solve problems such as difficulty in control, affecting production capacity, and increasing the time for preparing passivation layers, so as to achieve the effect of increasing short-circuit current and improving cell efficiency
Pending Publication Date: 2022-06-07
ZHEJIANG JINKO SOLAR CO LTD +1
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Problems solved by technology
In order to match the reduction in the thickness of the doped polysilicon layer, the existing conventional improvement methods mainly include: 1. Increase the thickness of the back passivation layer, but this will significantly increase the time for preparing the passivation layer and affect the production capacity; 2. The back electrode paste And the adjustment of the sintering process, but it is very difficult to control, especially the electrode paste, there is no product on the market that matches the thickness of the doped polysilicon layer after thinning
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[0034] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the invention unless specifically stated otherwise.
[0035] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
[0036] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification.
[0037] In all examples shown and discussed herein, any specific value should be construed as illustrative only and not as limiting. Accordingly, other instances of the exemplary embodiment may hav...
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Abstract
The invention discloses a preparation method of a solar cell, the solar cell and a photovoltaic module, and relates to the technical field of solar cells. The preparation method comprises the following steps: cleaning and texturing an N-type silicon substrate, forming a P-type diffusion layer on the front surface of the silicon substrate, forming an undoped polycrystalline silicon layer, carrying out N-type doping, removing winding plating on the front surface and the undoped polycrystalline silicon layer positioned on the front surface, and reserving at least part of doped glass layer positioned on the back surface, a first passivation layer and a second passivation layer are formed on the front face and the back face respectively, a first electrode is formed on one side of the first passivation layer, and a second electrode is formed on one side of the second passivation layer. According to the invention, at least part of the doped glass layer on the back surface is reserved, so that the thickness of the doped polycrystalline silicon is reduced in a manner suitable for large-scale mass production, and the short-circuit current and the cell efficiency are improved.
Description
technical field [0001] The present invention relates to the technical field of solar cells, and more particularly, to a preparation method of a solar cell, a solar cell and a photovoltaic assembly. Background technique [0002] In recent years, the world has been vigorously developing renewable energy. The more popular renewable energy sources include solar energy, wind energy, and tidal energy. Compared with traditional energy, solar energy has the characteristics of simple utilization, safety, and no pollution, and has become the focus of research in the field of renewable new energy. The basic principle of solar cell power generation is the photovoltaic effect, and a solar cell is a new energy device that converts sunlight into electrical energy. [0003] The solar cell includes a tunneling layer and a doped polysilicon layer. The main function of the doped polysilicon layer is to act as a field passivation layer to form energy band bending on the surface of the silicon ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H01L31/18H01L31/0216H01L31/05H01L31/068
CPCH01L31/02167H01L31/1804H01L31/1868H01L31/0516H01L31/0682Y02E10/547
Inventor 金井升侯乾坤张临安廖光明张昕宇
Owner ZHEJIANG JINKO SOLAR CO LTD