SOLAR CELLS AND METHODS OF FABRICATION THEREOF
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United States of America Patent
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Issued Date -
Aug 8, 2013
app pub date -
Jan 30, 2013
filing date -
Feb 6, 2012
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Abstract
A solar cell comprises a region formed on a substrate. The region has a dopant. The region can be one of a selective emitter and a back surface field of the solar cell. A grid line is deposited over a first portion of the region. A dopant profile is generated that has a concentration of electrically active dopants at a surface portion on the first portion of the region smaller than the concentration of electrically active dopants at a distance away from the surface portion. In an embodiment, an electrical activity of a portion of the dopant is deactivated in a second portion of the region outside the grid line. The grid line is used as a mask for deactivating the dopant.
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