Numerical simulation and fabrication of silicon sheet via spin casting.

Numerical simulation and fabrication of silicon sheet via spin casting.

Journal of nanoscience and nanotechnology (2013-07-19)

Jaewoo Lee, Hyunhui Kim, Changbum Lee, Joonsoo Kim, Bo-Yun Jang, Jinseok Lee, Youngsoo Ahn, Wooyoung Yoon

摘要

A spin-casting process for fabricating polycrystalline silicon sheets for use as solar cell wafers is proposed, and the parameters that control the sheet thickness are investigated. A numerical study of the fluidity of molten silicon indicates that the formation of thin silicon sheets without a mold and via spin casting is feasible. The faster the rotation speed of graphite mold, the thinner the thickness of sheet. After the spread of the molten silicon to cover the graphite mold with rotation speed of above 500 rpm, the solidification has to start. Silicon sheets can be produced by using the centrifugal force under appropriate experimental conditions. The spin-cast sheet had a vertical columnar microstructure due to the normal heat extraction to the substrate, and the sheet lifetime varied from 0.1 microS to 0.3 microS measured by using the microwave photoconductance decay (MW-PCD) to confirm that the spin-cast silicon sheet is applicable to photovoltaics.

材料

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产品描述

215619

Sigma-Aldrich

硅, powder, −325 mesh, 99% trace metals basis

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646687

Sigma-Aldrich

硅, wafer (single side polished), <100>, N-type, contains no dopant, diam. × thickness 2 in. × 0.5 mm

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647101

Sigma-Aldrich

硅, wafer (single side polished), <111>, N-type, contains no dopant, diam. × thickness 2 in. × 0.5 mm

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633097

Sigma-Aldrich

硅, nanopowder, <100 nm particle size (TEM), ≥98% trace metals basis

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647764

Sigma-Aldrich

硅, wafer (single side polished), <100>, P-type, contains boron as dopant, diam. × thickness 3 in. × 0.5 mm

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647675

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硅, wafer (single side polished), <100>, P-type, contains boron as dopant, diam. × thickness 2 in. × 0.5 mm

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647799

Sigma-Aldrich

硅, wafer (single side polished), contains phosphorus as dopant, <111>, N-type, diam. × thickness 2 in. × 0.5 mm

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343250

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硅, pieces, 99.95% trace metals basis

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647802

Sigma-Aldrich

硅, wafer (single side polished), <100>, N-type, contains phosphorus as dopant, diam. × thickness 3 in. × 0.5 mm

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647535

Sigma-Aldrich

硅, wafer (single side polished), <100>, N-type, contains no dopant, diam. × thickness 3 in. × 0.5 mm

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647780

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硅, wafer (single side polished), <100>, N-type, contains phosphorus as dopant, diam. × thickness 2 in. × 0.5 mm

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647705

Sigma-Aldrich

硅, wafer, <111>, P-type, contains boron as dopant, diam. × thickness 2 in. × 0.3 mm

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	5 mL	请联系客服了解存货情况	¥3,671.58

647543

Sigma-Aldrich

硅, wafer (single side polished), <111>, N-type, contains no dopant, diam. × thickness 3 in. × 0.5 mm

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	5 mL	请联系客服了解存货情况	¥3,671.58

647772

Sigma-Aldrich

硅, wafer (single side polished), <111>, P-type, contains boron as dopant, diam. × thickness 3 in. × 0.5 mm

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