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Solar cell and manufacturing method thereof

A technology for a solar cell and a manufacturing method, applied in the field of solar cells, can solve the problems of inability to meet requirements, inability to achieve high-efficiency performance, and high probability of defective products, and achieve the effects of improving conversion efficiency, increasing internal electron mobility, and realizing frequent changes.

Inactive Publication Date: 2018-05-04
孙健春
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The surface of a smooth solar cell has a reflectivity of more than 35% of sunlight. If it is not treated, the short-circuit current of the solar cell is bound to be very low, and high efficiency performance cannot be achieved. Therefore, we propose a solar cell
[0003] At the same time, the original method of producing solar panels has a high probability of defective products, and the current solar production process cannot meet the requirements at all.

Method used

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  • Solar cell and manufacturing method thereof
  • Solar cell and manufacturing method thereof

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Embodiment 1

[0031] see Figure 1-3 , the present invention provides a technical solution: a solar cell, comprising an upper plate 1 and a lower plate 2, a phosphorus-doped layer 3 is formed on the bottom surface of the upper plate 1, and a phosphorus-doped layer 3 is formed on the upper surface of the lower plate 2. There is a boron-doped layer 4, and the phosphorus-doped layer 3 and the boron-doped layer 4 are bonded together, and the bottom surface of the lower plate 2 is bonded with a reflective refractor 5 with a changing reflection angle, and the upper plate 1 and the lower plate The outer wall of the pole plate 2 is sleeved with a magnetic field conversion device 6 to increase the ion exchange speed, the upper pole plate 1 and the lower pole plate 2 are silicon plates, and the bottom surface of the upper pole plate 1 and the upper surface of the lower pole plate 2 are embedded There are electrodes 7 .

[0032] The reflective refraction plate 5 includes a bottom plate 51, the bottom...

Embodiment 2

[0041] A method for manufacturing a solar cell is provided:

[0042] The first step is silicon wafer cutting, material preparation, solar-grade monocrystalline or polycrystalline silicon rods made by the crucible Czochralski method, the original shape is cylindrical, and then cut into square silicon wafers (or polycrystalline square silicon wafers), silicon wafers The side length is generally 10~15cm, the thickness is about 200~350um, and the resistivity is about 1Ω.cm;

[0043] In the second step, texturing, the surface of the relatively smooth raw silicon wafer is etched by acid or alkali to make it uneven and rough, forming diffuse reflection and reducing the loss of solar energy directly hitting the surface of the silicon wafer. For monocrystalline silicon, the method of adding NaOH and alcohol is generally used for etching. Using the anisotropic etching of monocrystalline silicon, countless pyramid structures are formed on the surface. The temperature of the lye is about ...

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Abstract

The invention discloses a solar cell and a manufacturing method. The sunlight reflectivity of the surface of the polished solar cell is 35% or above, if no processing is performed, the short-circuit current of the solar cell certainly will be low, the efficient performance cannot be achieved, the light diffuse radiation of the solar cell is improved greatly through a light reflecting deflector, and the light conversion rate is increased; meanwhile, the method for manufacturing an existing solar cell panel is high in reject ratio, the exiting solar production technology cannot meet the requirement for solar cell panel production, the production method is applicable to production of a common battery panel and the cell panel, and the production efficiency and the production quality are improved.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a solar cell and a manufacturing method thereof. Background technique [0002] The surface of a smooth solar cell has a reflectivity of more than 35% of sunlight. If it is not treated, the short-circuit current of the solar cell is bound to be very low, and high efficiency cannot be achieved. Therefore, we propose a solar cell. [0003] At the same time, the original method of producing solar panels has a high probability of defective products, and the current solar energy production process cannot meet the requirements at all. To this end, a solar cell and a manufacturing method thereof are proposed. Contents of the invention [0004] The purpose of the present invention is to provide a solar cell and a manufacturing method to solve the problems raised in the background art above. [0005] In order to achieve the above object, the present invention provides the following...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/056H01L31/18
CPCH01L31/056H01L31/1804Y02E10/52Y02E10/547Y02P70/50
Inventor 孙健春
Owner 孙健春
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