Fabrication of contacts for silicon solar cells including printing burn through layers

摘要

A method for fabricating a contact (240) for a solar cell (200). The method includes providing a solar cell substrate (210) with a surface that is covered or includes an antireflective coating (220). For example, the substrate (210) may be positioned adjacent or proximate to an outlet of an inkjet printer (712) or other deposition device. The method continues with forming a burn through layer (230) on the coating (220) by depositing a metal oxide precursor (e.g., using an inkjet or other non-contact printing method to print or apply a volume of liquid or solution containing the precursor). The method includes forming a contact layer (240) comprising silver over or on the burn through layer (230), and then annealing is performed to electrically connect the contact layer (240) to the surface of the solar cell substrate (210) through a portion of the burn through layer (230) and the coating (220).

主权项

1. A method of fabricating an electric contact for a solar cell, comprising:
providing a solar cell substrate with a surface including an antireflective coating; forming a burn through layer on the antireflective coating including depositing a metal oxide precursor; after the forming of the burn through layer, forming a contact layer comprising silver over the burn through layer, wherein the contact layer is free of glass frits; etching through the antireflective coating by decomposing the metal oxide precursor; and annealing the contact layer to the surface of the solar cell substrate through a metal oxide formed from the decomposing of the metal oxide precursor, wherein the metal oxide precursor comprises a solution at ambient temperature including a metal-organic precursor to the metal oxide.