Electromagnetic stirring and retention to improve segregation in silicon for photovoltaics

Santara, Fatoumata; Delannoy, Yves; Autruffe, Antoine

doi:10.1016/j.jcrysgro.2011.11.074

Cited by 11 publications

(3 citation statements)

References 15 publications

(19 reference statements)

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“…This Lorentz force field acts to counter the gravitational forces on the melt. A similar case of electromagnetic retention for liquid silicon was reported in [5]. The electromagnetic force field, however, typically gives rise to a domeshaping of the melt in the casting frame, which represents a free surface problem complicating the numerical simulation of the system.…”

Section: Introductionmentioning

confidence: 57%

Modeling electromagnetically driven free-surface flows motivated by the Ribbon Growth on Substrate (RGS) process

Beckstein

Galindo

Schönecker

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. The Ribbon Growth on Substrate (RGS) technology is a crystallization technique that allows direct casting of silicon wafers and sheets of advanced metal-silicide compounds. With the potential of reaching high crystallization rates, it promises a very efficient approach for future photo-voltaic silicon wafer production compared to well-established processes in industry. However, a number of remaining problems, like process stability and controllability, need to be addressed for the RGS technology to eventually become a competitor in the near future. In this regard, it is very desirable to gain detailed insights into the characteristic process dynamics. To comply with this demand, we have developed a new numerical tool based on OpenFOAM (foam-extend), capable of simulating the free-surface dynamics of the melt flow under the influence of an applied alternating magnetic field. Our corresponding model thereby resolves the interaction of hydrodynamic and magnetodynamic effects in three-dimensional space. Although we currently focus on the RGS process, the modeling itself has been formulated in a more general form, which may be used for the investigation of similar problems, too. Here we provide a brief overview of these developments.

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Section: Introductionmentioning

confidence: 57%

Modeling electromagnetically driven free-surface flows motivated by the Ribbon Growth on Substrate (RGS) process

Beckstein

Galindo

Schönecker

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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“…Different from the traditional resistance heating directional solidification methods, the alternative electromagnetic field plays an important role in melting and solidification process [35][36][37]. A numerical model has been set to illustrate the effect of electromagnetic field.…”

Section: Chemical Analysismentioning

confidence: 99%

Purification of metallurgical silicon through directional solidification in a large cold crucible

Liu

Zhou

Zhao

et al. 2012

Journal of Crystal Growth

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“…Figura 57 -Curvas de resfriamento dos lingotes de silício. A partir desses resultados, pode-se concluir que a região inferior do lingote com menor teor de impurezas (purificada e sem intermetálicos) provavelmente também aumentou significativamente com o aumento da rotação do disco de 6 para 30 rpm, evidenciando um aumento da purificação do lingote com o aumento da convecção do líquido, como mostrado por (ALTENBEREND et al, 2017;LI et al, 2016;SANTARA;DELANNOY;AUTRUFFE, 2012). Além disso, esse aumento da altura de transição também evidencia um efeito (a) Interface de solidificação de cristal de liga Sn-Sb decantado.…”

Section: Resfriamento Dos Lingotesunclassified

Efeito da convecção forçada na macrossegregação durante a solidificação direcional do silício.

Nascimento

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Agradeço ao meu orientador Prof. Dr. Marcelo Martorano pelas discussões, disposição, apoio e ajuda durante todo o trabalho, sem as quais esse trabalho não seria finalizado.À CAPES, e ao programa Novos Talentos do IPT pelas bolsas de estudo concedidas. À FAPESP pela concessão do projeto de pesquisa processo nº 2017/22361-6. Ao Dr. João Batista Ferreira Neto pela coorientação e apoio para a pesquisa dentro do IPT. Ao Me. Moysés Leite de Lima pelas discussões sobre a purificação do silício que muito enriqueceram o trabalho. Ao técnico Wagner Laurindo, do IPT, que preparou os experimentos, as macro e micrografias com muito capricho e esmero. Ao projetista do IPT Akira Mizoguchi pelo projeto dos equipamentos que acondicionaram os motores que agitavam o banho de silício e ao técnico Walter, que os construiu. Esses equipamentos foram fundamentais para o projeto. Aos técnicos do IPT Johnny, Omar e Mané que fizeram as corridas de fusão do silício de forma irretocáveis. Aos técnicos do IPT Vitorino, Márcio, Alberto, Hélio e Rogério pelo apoio durante o vazamento do silício no cadinho, sem o qual os experimentos não teriam sucesso.

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Electromagnetic stirring and retention to improve segregation in silicon for photovoltaics

Cited by 11 publications

References 15 publications

Modeling electromagnetically driven free-surface flows motivated by the Ribbon Growth on Substrate (RGS) process

Modeling electromagnetically driven free-surface flows motivated by the Ribbon Growth on Substrate (RGS) process

Purification of metallurgical silicon through directional solidification in a large cold crucible

Efeito da convecção forçada na macrossegregação durante a solidificação direcional do silício.

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