Production of low-cost solar-grade silicon by reduction of SiF4 gas with sodium: Technical and industrial developmental status

2010 ◽  
Author(s):  
Jordi Perez-Mariano ◽  
Lorenza Moro ◽  
Kai Lau ◽  
Marc Hornbostel ◽  
Anoop Nagar ◽  
...  
Keyword(s):  
Low Cost ◽  
Solar Grade Silicon ◽  
Developmental Status ◽  
Grade Silicon

Ca-Si Alloy Addition Followed by Acid Leaching as a Route to Solar-Grade Silicon

2014 ◽  
Vol 881-883 ◽  
pp. 1562-1567
Author(s):  
Peng Zou ◽  
Kui Xian Wei ◽  
Wen Hui Ma ◽  
Ke Qiang Xie ◽  
Ji Jun Wu ◽  
...  
Keyword(s):  
Phosphorus Content ◽  
Low Cost ◽  
Acid Leaching ◽  
Impurity Phase ◽  
Solar Grade Silicon ◽  
Metallurgical Grade Silicon ◽  
Before And After ◽  
Alloy Addition ◽  
Grade Silicon ◽  
Leaching Condition

In present, refining of metallurgical grade silicon is one of the promising routes to low-cost solar grade silicon for solar cells. Alloying with Ca has shown a great potential as efficient refining method of MG-Si in combination with acid leaching. Compared with Ca metal, Ca-Si alloy is cheaper and more secure. Great removal of impurity depends on microstructure of MG-Si after alloyed with Ca-Si alloy. In the work, the change of impurity phase which was performed by the change of the microstructure of MG-Si before and after alloyed with Ca-Si alloy has been analyzed. It was determined that CaSi2phase contained significant phosphorus content after alloying with Ca-Si alloy, It also investigated the optimal acid leaching condition after leaching, which confirmed that metallurgical grade silicon with Ca-Si alloy addition followed by acid leaching could be a potential route to remove phosphorus from MG-Si.

Low-cost solar grade silicon powder through iterative gettering of thermally treated porous silicon

2016 ◽  
Vol 83 ◽  
pp. 324-328 ◽  
Author(s):  
Marouan Khalifa ◽  
Malek Atyaoui ◽  
Rachid Ouertani ◽  
Messaoud Hajji ◽  
Hatem Ezzaouia
Keyword(s):  
Porous Silicon ◽  
Low Cost ◽  
Silicon Powder ◽  
Solar Grade Silicon ◽  
Grade Silicon ◽  
Thermally Treated

Determination of impurity distributions in ingots of solar grade silicon by neutron activation analysis

2017 ◽  
Vol 105 (7) ◽  
Author(s):  
Barbara Karches ◽  
Jonas Schön ◽  
Heiko Gerstenberg ◽  
Gabriele Hampel ◽  
Patricia Krenckel ◽  
...  
Keyword(s):  
Neutron Activation Analysis ◽  
Theoretical Model ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Low Cost ◽  
Solar Grade Silicon ◽  
Metal Impurities ◽  
Crystallization Experiments ◽  
Grade Silicon

AbstractIn a series of crystallization experiments, the directional solidification of silicon was investigated as a low cost path for the production of silicon wafers for solar cells. Instrumental neutron activation analysis was employed to measure the influence of different crystallization parameters on the distribution of 3d-metal impurities of the produced ingots. A theoretical model describing the involved diffusion and segregation processes during the solidification and cooling of the ingots could be verified by the experimental results. By successive etching of the samples after the irradiation, it could be shown that a layer of at least 60 μm of the samples has to be removed to get real bulk concentrations.

A Low-Cost and Facile Method to Recycle Silicon Carbide Particles from the Solar Grade Silicon Slicing Wastes

Silicon ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2405-2412 ◽  
Author(s):  
Jing Guo ◽  
Yang Liu ◽  
Lu Liu ◽  
Jia Liu ◽  
Jian Kong ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Low Cost ◽  
Solar Grade Silicon ◽  
Grade Silicon ◽  
Silicon Carbide Particles ◽  
Carbide Particles ◽  
Silicon Slicing

Highly Efficient PEDOT:PSS/Silicon Hybrid Solar Cells via Effective Surface Microengineering of Low-Cost Solar-Grade Silicon Wafers

2021 ◽  
Vol 4 (4) ◽  
pp. 4181-4198
Author(s):  
Avritti Srivastava ◽  
Deepak Sharma ◽  
Premshila Kumari ◽  
Mrinal Dutta ◽  
Sanjay K. Srivastava
Keyword(s):  
Solar Cells ◽  
Low Cost ◽  
Silicon Wafers ◽  
Hybrid Solar Cells ◽  
Solar Grade Silicon ◽  
Effective Surface ◽  
Highly Efficient ◽  
Grade Silicon

scholarly journals Electrodeposition of crystalline silicon films from silicon dioxide for low-cost photovoltaic applications

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Xingli Zou ◽  
Li Ji ◽  
Jianbang Ge ◽  
Donald R. Sadoway ◽  
Edward T. Yu ◽  
...  
Keyword(s):  
Silicon Dioxide ◽  
Silicon Wafer ◽  
High Purity ◽  
Crystalline Silicon ◽  
Low Cost ◽  
Silicon Films ◽  
Silicon Solar Cells ◽  
Solar Grade Silicon ◽  
Photovoltaic Applications ◽  
Grade Silicon

AbstractCrystalline-silicon solar cells have dominated the photovoltaics market for the past several decades. One of the long standing challenges is the large contribution of silicon wafer cost to the overall module cost. Here, we demonstrate a simple process for making high-purity solar-grade silicon films directly from silicon dioxide via a one-step electrodeposition process in molten salt for possible photovoltaic applications. High-purity silicon films can be deposited with tunable film thickness and doping type by varying the electrodeposition conditions. These electrodeposited silicon films show about 40 to 50% of photocurrent density of a commercial silicon wafer by photoelectrochemical measurements and the highest power conversion efficiency is 3.1% as a solar cell. Compared to the conventional manufacturing process for solar grade silicon wafer production, this approach greatly reduces the capital cost and energy consumption, providing a promising strategy for low-cost silicon solar cells production.

Low cost solar grade silicon by recycling cast ingot rejects

2011 ◽  
Author(s):  
Julio A. Bragagnolo ◽  
Charles E. Bucher ◽  
John R. Mott ◽  
Michael Hayes
Keyword(s):  
Low Cost ◽  
Solar Grade Silicon ◽  
Cast Ingot ◽  
Grade Silicon
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