Abstract: A bus bar for a silicon solar cell. The bus bar is a strip of electrically conductive material with a plurality of protrusions extending from at least one side of the bus bar.

Abstract: A method of depositing a material on a receiving substrate, the method comprising: providing a source substrate having a back surface and a front surface, the back surface carrying at least one piece of coating material; providing a receiving substrate positioned adjacent to the source substrate and facing the coating material; and radiating light towards the front surface of the source substrate, to remove at least one piece of the coating material from the source substrate and deposit said removed at least one piece onto the receiving substrate as a whole.

Abstract: A photovoltaic cell, the cell comprising: a silicon substrate of bulk silicon material having front and rear surfaces; an emitter layer on the rear surface of said substrate; elongate channels through the emitter layer; elongate contacts to the bulk of the silicon substrate within at least some of the elongate channels, wherein the contacts are narrower than the channels; and gaps in the emitter between at least some of the elongate contacts and the emitter layer on the sides of the contacts.

Abstract: A photovoltaic cell, the cell comprising: a silicon substrate of bulk silicon material having front and rear surfaces; an emitter layer on the rear surface of said substrate; elongate channels through the emitter layer; elongate contacts to the bulk of the silicon substrate within at least some of the elongate channels, wherein the contacts are narrower than the channels; and gaps in the emitter between at least some of the elongate contacts and the emitter layer on the sides of the contacts.