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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Solar Cell Silicon
Presentation Title Solar Silicon by Direct Carbothermic Reduction - Review and Outlook
Author(s) Jan-Philipp Mai, Neda Rezaii
On-Site Speaker (Planned) Jan-Philipp Mai
Abstract Scope Solar silicon production starts with the production of silicon metal from quartz and carbon. Produced mainly for the aluminum and chemical industry the silicon metal has a purity of 98-99%. Contrary, the threshold for solar silicon in considered to be 99.9999%. Refining of silicon to solar silicon is mainly done via the gas-phase with high technical, energetic and financial efforts. Thus, novel routes to provide cost-effective and easy to scale alternatives for solar silicon production were developed. One of this routes is the direct carbothermic reduction of high-purity raw materials to produce solar silicon. However, due to a dramatic price decrease to $15/kg in the past years, many projects were stopped. Based on a review of project results published throughout the years in this field, we will present our approach for a low-cost solar silicon production by direct carbothermic reduction of renewable raw materials in a microwave furnace.
Proceedings Inclusion? Planned:


Boron Removal from Ferrosilicon Alloy via Slag Treatment
Crystal Growth Mechanism of Si in Hypereutectic Al-Si Melt during the Electromagnetic Directional Solidification
Enhancement of Efficiency in Nanostructured-Si Solar Cells by Employing Doped-graphene Transparent Conductive Electrodes
Influence of Chemical and Heat Treatment on the Properties of Disi Raw Sandstones in Jordan
K-17: High Temperature Pressure Filtration Applying for Separation of Silicon and Liquation Agent
K-18: Leaching of Indium from ITO Present in Amorphous Silicon Photovoltaic Modules
K-19: The Effect of Rapid Heat Treatment on Crystal Defect Evolution and Electrical Properties of the Original High Efficient Polycrystalline Silicon
Removal Impurities from Metallurgical Silicon by Slag Treatment Combined with Acid Leaching
Review of Solar Silicon Recycling
Solar Silicon by Direct Carbothermic Reduction - Review and Outlook
Structure Nature of Boron Removal from Silicon in Slagging Refining: A Raman Spectroscopy and NMR Spectroscopy Study
The Mechanism of Boron Removal from Silicon Alloy by Electric Field Using Slag Treatment
Thermo-Calc of the Phase Diagram of Calcium Silicon (Ca-Si) System
Thermo-Calc of the Phase Diagram of the Fe-Si System
Three-dimensional Crystal-plasticity based Model for Intrinsic Stresses in Multi-junction Photovoltaic

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