Black silicon solar cells with interdigitated back-contacts achieve 22.1% efficiency

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Savin, Hele
dc.contributor.author Repo, Päivikki
dc.contributor.author von Gastrow, Guillaume
dc.contributor.author Ortega, Pablo
dc.contributor.author Calle, Eric
dc.contributor.author Garín, Moises
dc.contributor.author Alcubilla, Ramon
dc.date.accessioned 2015-06-02T09:01:07Z
dc.date.available 2015-06-02T09:01:07Z
dc.date.issued 2015
dc.identifier.citation Savin, Hele & Repo, Päivikki & von Gastrow, Guillaume & Ortega, Pablo & Calle, Eric & Garín, Moises & Alcubilla, Ramon. 2015. Black silicon solar cells with interdigitated back-contacts achieve 22.1% efficiency. Nature Nanotechnology. 11. DOI: 10.1038/nnano.2015.89. en
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/16406
dc.description.abstract The nanostructuring of silicon surfaces—known as black silicon—is a promising approach to eliminate front-surface reflection in photovoltaic devices without the need for a conventional antireflection coating. This might lead to both an increase in efficiency and a reduction in the manufacturing costs of solar cells. However, all previous attempts to integrate black silicon into solar cells have resulted in cell efficiencies well below 20% due to the increased charge carrier recombination at the nanostructured surface. Here, we show that a conformal alumina film can solve the issue of surface recombination in black silicon solar cells by providing excellent chemical and electrical passivation. We demonstrate that efficiencies above 22% can be reached, even in thick interdigitated back-contacted cells, where carrier transport is very sensitive to front surface passivation. This means that the surface recombination issue has truly been solved and black silicon solar cells have real potential for industrial production. Furthermore, we show that the use of black silicon can result in a 3% increase in daily energy production when compared with a reference cell with the same efficiency, due to its better angular acceptance. en
dc.format.extent 11
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Nature Publishing Group en
dc.relation.ispartofseries Nature Nanotechnology en
dc.rights © 2015 Nature Publishing Group. This is the post print version of the following article: Savin, Hele & Repo, Päivikki & von Gastrow, Guillaume & Ortega, Pablo & Calle, Eric & Garín, Moises & Alcubilla, Ramon. 2015. Black silicon solar cells with interdigitated back-contacts achieve 22.1% efficiency. Nature Nanotechnology. 11. DOI: 10.1038/nnano.2015.89, which has been published in final form at http://www.nature.com/nnano/journal/vaop/ncurrent/full/nnano.2015.89.html en
dc.subject.other Physics en
dc.title Black silicon solar cells with interdigitated back-contacts achieve 22.1% efficiency en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.rights.holder Nature Publishing Group
dc.contributor.school Sähkötekniikan korkeakoulu fi
dc.contributor.school School of Electrical Engineering en
dc.contributor.department Mikro- ja nanotekniikan laitos fi
dc.contributor.department Department of Micro and Nanosciences en
dc.subject.keyword black silicon en
dc.subject.keyword solar cells en
dc.subject.keyword efficiency en
dc.subject.keyword manufacturing costs en
dc.identifier.urn URN:NBN:fi:aalto-201506013056
dc.type.dcmitype text en
dc.identifier.doi 10.1038/nnano.2015.89
dc.type.version Post print en


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