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Producing a mono-crystalline sheet

A single wafer, nucleated crystal technology, applied in the field of manufacturing mono-crystalline sheet, can solve problems such as low efficiency

Active Publication Date: 2015-06-24
INT BUSINESS MASCH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, solar cells using amorphous silicon exhibit efficiencies below 10%

Method used

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  • Producing a mono-crystalline sheet
  • Producing a mono-crystalline sheet
  • Producing a mono-crystalline sheet

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Embodiment Construction

[0054] As used herein, "bring into contact" may refer to the act of touching, forming contact, or immediate proximity, particularly the act of touching, forming contact, or immediate proximity between nucleated crystals and molten alloys action. "Bringing into contact" includes relative movement of elements toward each other to bring into contact.

[0055] As used herein, "melting" may refer to a molten substance, where melting is the process of heating a solid substance to a melting point at which it becomes a liquid. Thus, molten alloys can imply selection and application of an appropriate temperature for creating a liquid phase of the alloy.

[0056] "Alloy" may refer to a homogeneous mixture of two or more elements, at least one of which is a metal. For example, according to an aspect of the method or apparatus for manufacturing a silicon single crystal wafer, a gold silicon alloy may be used.

[0057] The term "eutectic" means that an alloy comprising a combination of ...

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Abstract

A method for producing a mono-crystalline sheet includes providing at least two aperture elements forming a gap in between; providing a molten alloy including silicon in the gap; providing a gaseous precursor medium comprising silicon in the vicinity of the molten alloy; providing a silicon nucleation crystal in the vicinity of the molten alloy; and bringing in contact said silicon nucleation crystal and the molten alloy. A device for producing a mono-crystalline sheet includes at least two aperture elements at a predetermined distance from each other, thereby forming a gap, and being adapted to be heated for holding a molten alloy including silicon by surface tension in the gap between the aperture elements; a precursor gas supply supplies a gaseous precursor medium comprising silicon in the vicinity of the molten alloy; and a positioning device for holding and moving a nucleation crystal in the vicinity of the molten alloy.

Description

technical field [0001] The present disclosure relates to methods and apparatus for manufacturing mono-crystalline sheets, in particular to mono-crystalline silicon sheets. Additionally, methods for fabricating solar cells and solar cell devices are provided. Background technique [0002] Most semiconductor devices such as integrated circuits or microchips are based on silicon. Furthermore, silicon can be applied in photovoltaic applications and forms the basis of most solar cells used. For solar cell applications, thin silicon substrates are widely used. [0003] It is known that the efficiency of silicon-based solar cells depends on the crystallinity of the silicon used as the substrate. For example, solar cells employing amorphous silicon exhibit efficiencies below 10%. Higher efficiency solar cells using polysilicon can achieve efficiencies of about 15%. The efficiency of a solar cell is typically measured in terms of the electricity generated by the solar cell per i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B11/10C30B11/12C30B13/18C30B15/08H01L31/18
CPCC30B11/10C30B13/18H01L31/1804Y02E10/547C30B11/12C30B15/08Y10T117/1032Y02P70/50H01L31/18C30B11/003C30B11/02C30B15/002C30B21/06C30B29/06C30B29/64H01L31/0312H01L31/036
Inventor M·T·比约克H·E·里埃尔H·施米特
Owner INT BUSINESS MASCH CORP