Solar cells and methods of fabrication thereof
AssigneeSilicon Solar Solutions, LLC
InventorsSeth Daniel Shumate, Douglas Arthur Hutchings, Hafeezuddin Mohammed
Life of this patent
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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.
Claims27
1-83. (canceled)
A solar cell comprising:
- a first region formed on a first side of a substrate, the first region having a first dopant;
- and
- a first grid line over a first portion of the first region, wherein an electrical activity of a part of the first dopant is deactivated in a second portion of the first region outside the grid line.
A solar cell, comprising:
- a conductive grid line on a first portion of a first region on a first side of a substrate, wherein a concentration of active dopants at a first surface portion on a second portion of the first region outside the grid line is less than the concentration of active dopants at a distance away from the first surface portion.
A method to manufacture a solar cell comprising:
- deactivating an electrical activity of a dopant in a first portion of a region of the solar cell by exposure to chemical species using a grid line deposited on a second portion of the region as a mask.
A method to manufacture a solar cell comprising:
- generating a dopant profile having a concentration of active dopants at a first surface portion on a first portion of a region of solar cell smaller than the concentration of active dopants at a distance away from the surface portion, wherein a grid line is on a second portion of the region of the solar cell.
Dependencies are inferred from the claim text.