Metallurgical Ways of Silicon Meltstock Processing

Dietl, J.

doi:10.1016/b978-0-444-87024-7.50013-5

Cited by 9 publications

(3 citation statements)

References 31 publications

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“…The papers by Dosaj, et al [3] and by Diet1 [28], also refer to earlier work on gas-blowing purification in the literature (primarily patents). These included the use of chlorine, SiC14, and oxygen to reduce metal impurities, the use of water, air (02) and vacuum to reduce phosphorus, and the use of C02 to reduce carbon impurities.…”

Section: Discussionmentioning

confidence: 99%

Thermochemical Analysis for Purification of Polysilicon Melts

Ho¹

1999

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Section: Discussionmentioning

confidence: 99%

Thermochemical Analysis for Purification of Polysilicon Melts

Ho¹

1999

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“…Renewed recognition of the need for solar-grade silicon has inspired updating of some of these projects and exploration of alternative approaches (7)(8)(9)(10)(11)(12)(13)(14)(15)(16). Fig.…”

Section: Solar Silicon Productionmentioning

confidence: 99%

The status of polysilicon feedstock

Mitchell¹

1999

AIP Conference Proceedings

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Enhancement of the ultraviolet absorption and Raman efficiencies of a few nanometer thick Si-on-insulator J. Appl. Phys. 112, 074317 (2012) Optical absorbance of doped Si quantum dots calculated by time-dependent density functional theory with partial electronic self-interaction corrections J. Chem. Phys. 137, 144301 (2012) Magnetocapacitance of an electrically tunable silicene device Appl. Phys. Lett. 101, 132412 (2012) Tuning luminescence properties of silicon nanocrystals by lithium doping J. Appl. Phys. 112, 064322 (2012) Features of temperature dependence of contact resistivity in ohmic contacts on lapped n-Si Abstract. Growth in world-wide demand for silicon (Si) photovoltaics (PV) and a short-fall in the traditional supplies of Si into the PV industry call for renewed interest in determining the quantifies of Si required per megawatt, the specifications for solar grade Si feedstock, and the technologies for producing such material. An ample, dedicated and consistent solar Si supply independent of the Si electronics industry is recommended. Low cost (less than $20 per kg) solar Si feedstock is part of the technology portfolio for achieving PV ~oducts in the $1 pex watt range.

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“…In this case, the thermodynamic equilibrium for B distribution between liquid silicon and molten slags is studied, which is defined based on the weight percentages of B in the two phases as: slag [wt%B] metal (1) The magnitude of L B -value is depending on slag type and composition, temperature, gas phase composition and as it is a quite important parameter it has been extensively studied through many experimental works for many silicate slag systems. For instance, many slags such as CaO-SiO 2 [5][6][7][8][9][10], CaO-CaF 2 -SiO 2 [6,8,11,12], CaO-BaO-SiO 2 [6], CaO-MgO-SiO 2 [5,6,13], CaO-Al 2 O 3 -SiO 2 [14], CaO-Na 2 O-SiO 2 [14,15], Al 2 O 3 -CaO-MgO-SiO 2 [16], Al 2 O 3 -BaO-SiO 2 [16] and Al 2 O 3 -CaO-MgO-SiO 2 [16], Na 2 O-SiO 2 [17] and CaO-Na 2 O-SiO 2 slags [18] have been studied experimentally. In general L B is increased with increasing temperature as been observed through the studies using CaO-SiO2 slags [6], CaO-CaF2-SiO2 slags [6,12], and CaO-Na2O-SiO2 slags [14].…”

Section: Introductionmentioning

confidence: 99%

Thermochemical Aspects of Boron and Phosphorus Distribution Between Silicon and BaO-SiO2 and CaO-BaO-SiO2 lags

Safarian

2018

Silicon

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In the production of solar grade silicon by metallurgical route the distribution of B and P between slags and liquid silicon is the most important key issue. The equilibrium and thermochemistry of reactions between liquid silicon and BaO-SiO 2 slags and up to 10% BaO-containing CaO-BaO-SiO 2 slags is studied through experimental work and using thermodynamic calculations. It is shown that the distribution coefficient of B (L B ) is higher for the CaO-BaO-SiO 2 slags than that for BaO-SiO 2 slags and it is not significantly affected by temperature and composition changes of the slags. In contrast, the distribution coefficient of P (L P ) is higher for BaO-SiO 2 slags than that for the CaO-BaO-SiO 2 slags, and it is higher at lower temperatures. The chemical activities of the dilute solutions of Ba in liquid silicon, and the dilute solutions of B 2 O 3 , P 2 O 5 and BaO in the slags are calculated. Moreover, the reaction mechanisms for B, P, Ba and Ca transport between liquid silicon and the slags are explained.

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Metallurgical Ways of Silicon Meltstock Processing

Cited by 9 publications

References 31 publications

Thermochemical Analysis for Purification of Polysilicon Melts

Thermochemical Analysis for Purification of Polysilicon Melts

The status of polysilicon feedstock

Thermochemical Aspects of Boron and Phosphorus Distribution Between Silicon and BaO-SiO2 and CaO-BaO-SiO2 lags

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