主权项 |
1. A method comprising forming a contact pattern on a surface of a solar cell, the solar cell comprising a textured semiconductor substrate, the forming comprising:
forming at least one film layer of a layer of the solar cell, the at least one film layer comprising a material having an ablation threshold; irradiating a first portion of the at last one film layer with a laser, without irradiating a second portion of the at least one film layer, the laser having an intensity profile of a non-Gaussian top-hat laser beam, and the irradiating ablating the entire first portion of the at least one film layer, leaving the second portion of the at least one film layer as the contact pattern, the laser being operated at a fluence near or at the ablation threshold of the material of the at least one film layer; wherein the texture semiconductor substrate comprises a random pyramid-shaped texture. |