Monocrystalline silicon solar cell and its corrosion solution, texturing method and preparation method, and photovoltaic module

A solar cell and corrosion solution technology, applied in the field of solar power generation, can solve the problems of high production cost and high fragmentation rate of monocrystalline silicon cells

Inactive Publication Date: 2011-12-14
YINGLI ENERGY CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The silicon wafer thickness of existing monocrystalline silicon solar cells is usually 180 μm to 220 μm, and the fragmentation rate is relatively high, generally more than 5%, which also makes the production cost of monocrystalline silicon solar cells relatively high

Method used

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  • Monocrystalline silicon solar cell and its corrosion solution, texturing method and preparation method, and photovoltaic module
  • Monocrystalline silicon solar cell and its corrosion solution, texturing method and preparation method, and photovoltaic module
  • Monocrystalline silicon solar cell and its corrosion solution, texturing method and preparation method, and photovoltaic module

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preparation example Construction

[0039] In addition, the present invention also provides a method for preparing a single crystal silicon battery, comprising:

[0040] Cleaning the oriented monocrystalline silicon wafer;

[0041] Texturing the cleaned monocrystalline silicon cell, specifically: corroding the cleaned oriented monocrystalline silicon wafer at 50°C to 70°C with an etching solution, the etching solution includes: 3wt% to 8wt% potassium hydroxide, 0.0005wt%-0.01wt% isopropanol, 2wt%-6wt% sodium silicate and the rest pure water;

[0042] Diffusion, etching, film coating, printing and sintering are performed sequentially on the textured monocrystalline silicon cells to obtain monocrystalline silicon cells.

[0043] The above method is to first clean the crystal silicon wafer, and then perform texturing according to the above method, and form a pyramid texture structure on the surface of the crystal silicon wafer, which enhances the resistance of the silicon wafer to the incident sun. light abso...

Embodiment 1

[0059] Add 5g KOH, 0.0055g isopropanol and 4g sodium silicate to 90.9945g pure water and stir for 18 minutes.

Embodiment 2

[0061] Add 3.5g KOH, 0.0015g isopropanol and 2g sodium silicate to 94.4985g pure water and stir for 20 minutes to get it.

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Abstract

The invention provides etching liquid for a (111) crystal direction monocrystalline silicon solar cell, and the etching liquid comprises 3% by weight to 8% by weight of potassium hydroxide, 0.0005% by weight to 0.01% by weight of isopropanol, 2% by weight to 6% by weight of sodium silicate and the balance of pure water. The invention further provides a texturing method of the monocrystalline silicon solar cell, and the texturing method uses the etching liquid to etch a (111) crystal direction monocrystalline silicon chip at the temperature of 50 DEG C-70 DEG C. The invention further provides a preparation method of the monocrystalline silicon cell chip by applying the etching liquid and the texturing method, the monocrystalline silicon solar cell made of a (111) crystal direction matrix material and a photovoltaic component produced by the monocrystalline silicon cell. The (111) crystal direction monocrystalline silicon solar cell is higher in strength and low in fragmentation rate.

Description

technical field [0001] The invention relates to the field of solar power generation, in particular to a monocrystalline silicon solar cell and its corrosion solution, a texturing method and preparation method, and a photovoltaic module. Background technique [0002] In recent years, with the advancement of industrialization, conventional energy sources such as coal, oil and natural gas have been increasingly depleted, and a series of environmental protection issues have emerged. How to get rid of the limitations of the above-mentioned conventional energy sources in quantity and environmental protection pressure, and seek a new type of green energy has become an important issue. It has become the main research object of many countries today. As a renewable green energy, solar energy has gradually developed rapidly around the world. With the increasing maturity of solar power generation technology, solar cells have been widely used in many fields such as industry, agriculture...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/40C30B33/10H01L31/18
CPCY02P70/50
Inventor 高艳杰霍桢潮雷浩
Owner YINGLI ENERGY CHINA
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