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FABRICATION OF THIN-FILM PHOTOVOLTAIC CELLS WITH REDUCED RECOMBINATION LOSSES

Methods are provided for fabricating photovoltaic cell contacts, which include: providing a block copolymer layer above an electrical contact layer of the photovoltaic cell, the block copolymer layer being self-assembled by phase segregation to include multiple structures of a first polymer material surrounded, at least in part, by a second polymer material; selectively etching the block copolymer layer to remove the multiple structures, forming holes in the block copolymer layer; and using the holes in the block copolymer layer to facilitate providing electrical contacts between a light absorption layer of the photovoltaic cell and the electrical contact layer. For instance, the holes in the copolymer layer may be used in etching a passivation layer over the electrical contact layer to form nano-sized contact openings in the passivation layer to the contact layer. Once provided, the cell's light absorption material forms contacts extending through the contact openings in the passivation layer.


» Number: US2018006179A1 (A1)

» Publication Date: 18//2/04/0

» Applicant: IBM?[US]

» Inventor: BECKER CHRISTIAN?[DE]; EICKELMANN HANS-JUERGEN?[DE] (2)

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This project has received funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement n° [310187].