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Thin-film solar cell substrate preparing technology

A technology for solar cells and preparation processes, applied in sustainable manufacturing/processing, circuits, photovoltaic power generation, etc., can solve problems such as expensive, achieve the effect of avoiding cracking, avoiding high-temperature sintering process, and reducing costs

Inactive Publication Date: 2004-11-17
TIELING XIEHE ELECTRIC
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AI Technical Summary

Problems solved by technology

[0005] However, most of the substrate materials currently used are expensive monocrystalline silicon or polycrystalline silicon bulk materials, so an important breakthrough in reducing costs lies in the substrate material.

Method used

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Experimental program
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Embodiment Construction

[0009] The invention relates to a preparation process of a thin-film solar cell substrate. Mix Si and SiC powders, and sinter to melt the SiC and bond the SiC into a thin sheet with a flat and dense surface, on which a high-quality polysilicon film can be deposited. Its specific process is:

[0010] Mix commercially available SiC and Si powders at a molar ratio of 1:1, or mix C, SiC and Si powders at a molar ratio of 1:2:2; the particle size of SiC is 0.05-0.5 μm; As the medium, use wet ball milling for 12 hours. Mix well, flow H at a flow rate of 12L / min 2 After being dried and sieved in the atmosphere, it is dry-pressed into a sheet-like sample of 30mm×20mm×1mm. Then sinter in a hot press sintering furnace under the protection of Ar gas with a flow rate of 12L / min at a temperature of 1040°C. During the firing process, a certain pressure of 25MPa is applied, kept for 1 hour, cooled naturally, and taken out at room temperature. In the latter formula, part of molten Si reac...

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Abstract

The invention discloses a manufacturing process for a kind of film solar energy battery substrate belonging to the solar battery material manufacturing range. The Si and the SiC are blended together, through being baked, the silicon is melted to bond the SiC into shape, the thin piece with flat and tight surface can be produced, and the high quality multi-crystal silicon film is deposited on the surface. The invention avoid the process of high temperature baking needed by normal ceramic substrate, it has advantage to form the large particle and high quality multi-crystal silicon film, it also can avoid the fracture problem in the cooling process; it decreases the cost further.

Description

technical field [0001] The invention belongs to the scope of solar cell material preparation, and in particular relates to a thin-film solar cell substrate preparation process. Background technique [0002] Energy and the environment are two major issues facing the current world economic development. Due to the characteristics of unlimited resources and no pollution, solar photovoltaic power generation has become one of the fiercely competitive fields in developed countries. The development of solar cells has thus become a hot topic in research and development in this field in developed countries in the world. As a developing country, our country also has the reality of energy shortage and environmental degradation. Therefore, it is a strategic move for the development of my country's energy industry to develop new energy sources mainly solar energy while vigorously improving energy efficiency. [0003] In recent years, the production and market sales of solar photovoltaic...

Claims

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Application Information

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IPC IPC(8): H01L21/00H01L31/18
CPCY02E10/50Y02P70/50
Inventor 黄勇李海峰张厚兴万之坚张立明马天
Owner TIELING XIEHE ELECTRIC
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