Phosphorus removal from upgraded metallurgical-grade silicon by vacuum directional solidification

Vacuum ◽  
2017 ◽  
Vol 146 ◽  
pp. 159-163 ◽  
Author(s):  
Cong Zhang ◽  
Kuixian Wei ◽  
Damin Zheng ◽  
Wenhui Ma ◽  
Yongnian Dai
Keyword(s):  
Directional Solidification ◽  
Phosphorus Removal ◽  
Metallurgical Grade Silicon ◽  
Grade Silicon ◽  
Upgraded Metallurgical Grade Silicon

Effect of Withdrawal Rate on Defects of Upgraded Metallurgical Grade (UMG)-Silicon Prepared by Vacuum Directional Solidification

2013 ◽  
Vol 750 ◽  
pp. 316-319
Author(s):  
Wen Hui Ma ◽  
Yong Jiang ◽  
Yang Zhou ◽  
Kui Xian Wei ◽  
Bin Yang ◽  
...  
Keyword(s):  
Dislocation Density ◽  
Directional Solidification ◽  
Carbon Concentration ◽  
Withdrawal Rate ◽  
Structural Defects ◽  
Driving Mechanism ◽  
Quasi Equilibrium ◽  
Metallurgical Grade Silicon ◽  
Grade Silicon ◽  
Upgraded Metallurgical Grade Silicon

The structural defects including dislocations and grain boundaries (GBs) in upgraded metallurgical grade silicon (UMG-Si) prepared by vacuum directional solidification were investigated. The results demonstrated that higher withdrawal rates increased the dislocation density. The state of melt growth changed from quasi-equilibrium to non-equilibrium, and the GB type was also highly related to the withdrawal rate, especially for ∑3 boundary. The change of total interfacial energy and increase of carbon concentration may be a possible driving mechanism for this phenomenon.

Solar cells from upgraded metallurgical-grade silicon purified by metallurgical routes

2013 ◽  
Vol 5 (2) ◽  
pp. 023129 ◽  
Author(s):  
A. D. S. Côrtes ◽  
D. S. Silva ◽  
G. A. Viana ◽  
E. F. Motta ◽  
P. R. Zampieri ◽  
...  
Keyword(s):  
Solar Cells ◽  
Metallurgical Grade Silicon ◽  
Grade Silicon ◽  
Upgraded Metallurgical Grade Silicon

scholarly journals Impact of compensation on the boron and oxygen-related degradation of upgraded metallurgical-grade silicon solar cells

2014 ◽  
Vol 120 ◽  
pp. 390-395 ◽  
Author(s):  
Maxime Forster ◽  
Pierre Wagner ◽  
Julien Degoulange ◽  
Roland Einhaus ◽  
Giuseppe Galbiati ◽  
...  
Keyword(s):  
Solar Cells ◽  
Silicon Solar Cells ◽  
Metallurgical Grade Silicon ◽  
Grade Silicon ◽  
Upgraded Metallurgical Grade Silicon
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