Method and material for purifying iron disilicide for photovoltaic application
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United States of America Patent
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Dec 24, 2013
Grant Date -
Apr 2, 2009
app pub date -
Sep 12, 2008
filing date -
Sep 28, 2007
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Abstract
A method for processing iron disilicide for manufacture photovoltaic devices. The method includes providing a first sample of iron disilicide comprising at least an alpha phase entity, a beta phase entity, and an epsilon phase entity. The method includes maintaining the first sample of iron disilicide in an inert environment and subjects the first sample of iron disilicide to a thermal process to form a second sample of iron disilicide. The second sample of iron disilicide comprises substantially beta phase iron disilicide and is characterized by a first particle size. The method includes introducing an organic solvent to the second sample of iron disilicide, forming a first mixture of material comprising the second sample of iron disilicide and the organic solvent. The method processed the first mixture of material including the second sample of iron disilicide using a grinding process. The method converted the second sample of iron disilicide having the first particle size to a third sample of iron disilicide having a second particle size. The organic solvent is removed and output a third sample of iron disilicide characterized by the second particle size and greater than about 90% of the beta phase entity.
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