Laser-absorbing seed layer for solar cell conductive contact
OwnerMichael Morseinventor
Life of this patent
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Abstract
Laser-absorbing seed layers for solar cell conductive contacts and methods of forming solar cell conductive contacts are described. For example, a method of fabricating a solar cell includes forming a metal seed paste above a substrate. The metal seed paste includes a laser-absorbing species. The metal seed paste is irradiated with a laser to form a metal seed layer. The irradiating includes exciting the laser-absorbing species. A conductive contact for the solar cell is then formed from the metal seed layer.
Claims21
A method of fabricating a solar cell, the method comprising:
- forming a metal seed paste above a substrate, the metal seed paste comprising a laser-absorbing species;
- irradiating the metal seed paste with a laser to form a metal seed layer, the irradiating comprising exciting the laser-absorbing species;
- and
- forming a conductive contact for the solar cell from the metal seed layer.
A method of fabricating a solar cell, the method comprising:
- forming a metal seed paste on an emitter region disposed above a substrate, the metal seed paste comprising a laser-absorbing species, and the emitter region comprising a doped polycrystalline silicon layer;
- irradiating the metal seed paste with a laser to form a metal seed layer, the irradiating comprising exciting the laser-absorbing species;
- and
- forming a conductive back-contact for the emitter region of the solar cell from the metal seed layer.
A method of fabricating a solar cell, the method comprising:
- forming a metal seed paste on a surface of an N-type or P-type doped region of an N-type bulk crystalline silicon substrate, the metal seed paste comprising a laser-absorbing species;
- irradiating the metal seed paste with a laser to form a metal seed layer, the irradiating comprising exciting the laser-absorbing species;
- and
- forming a conductive back-contact for the N-type or P-type doped region of the substrate from the metal seed layer.
21-25. (canceled)
Dependencies are inferred from the claim text.