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A magnesium/amorphous silicon passivating contact for n-type crystalline silicon solar cells

Wan, Yimao; Samundsett, Christian; Yan, Di; Allen, Thomas; Peng, Jun; Cui, Jie (Jason); Zhang, Xinyu; Bullock, James; Cuevas, Andres

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Among the metals, magnesium has one of the lowest work functions, with a value of 3.7 eV. This makes it very suitable to form an electron-conductive cathode contact for silicon solar cells. We present here the experimental demonstration of an amorphous silicon/magnesium/aluminium (a-Si:H/Mg/Al) passivating contact for silicon solar cells. The conduction properties of a thermally evaporated Mg/Al contact structure on n-type crystalline silicon (c-Si) are investigated, achieving a low resistivity...[Show more]

dc.contributor.authorWan, Yimao
dc.contributor.authorSamundsett, Christian
dc.contributor.authorYan, Di
dc.contributor.authorAllen, Thomas
dc.contributor.authorPeng, Jun
dc.contributor.authorCui, Jie (Jason)
dc.contributor.authorZhang, Xinyu
dc.contributor.authorBullock, James
dc.contributor.authorCuevas, Andres
dc.date.accessioned2018-11-29T22:51:51Z
dc.date.available2018-11-29T22:51:51Z
dc.identifier.issn0003-6951
dc.identifier.urihttp://hdl.handle.net/1885/152002
dc.description.abstractAmong the metals, magnesium has one of the lowest work functions, with a value of 3.7 eV. This makes it very suitable to form an electron-conductive cathode contact for silicon solar cells. We present here the experimental demonstration of an amorphous silicon/magnesium/aluminium (a-Si:H/Mg/Al) passivating contact for silicon solar cells. The conduction properties of a thermally evaporated Mg/Al contact structure on n-type crystalline silicon (c-Si) are investigated, achieving a low resistivity Ohmic contact to moderately doped n-type c-Si (∼5 × 1015 cm−3) of ∼0.31 Ω cm2 and ∼0.22 Ω cm2 for samples with and without an amorphous silicon passivating interlayer, respectively. Application of the passivating cathode to the whole rear surface of n-type front junction c-Si solar cells leads to a power conversion efficiency of 19% in a proof-of-concept device. The low thermal budget of the cathode formation, its dopant-less nature, and the simplicity of the device structure enabled by the Mg/Al contact open up possibilities in designing and fabricating low-cost silicon solar cells.
dc.description.sponsorshipThis work was supported by the Australian Government through the Australian Research Council and the Australian Renewable Energy Agency (ARENA). Some facilities at the Australian National Fabrication Facility at the ANU were used.
dc.format.mimetypeapplication/pdf
dc.publisherAmerican Institute of Physics (AIP)
dc.sourceApplied Physics Letters
dc.titleA magnesium/amorphous silicon passivating contact for n-type crystalline silicon solar cells
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume109
dc.date.issued2016
local.identifier.absfor010203 - Calculus of Variations, Systems Theory and Control Theory
local.identifier.absfor090699 - Electrical and Electronic Engineering not elsewhere classified
local.identifier.absfor099900 - OTHER ENGINEERING
local.identifier.ariespublicationU3488905xPUB24922
local.type.statusPublished Version
local.contributor.affiliationWan, Yimao, College of Engineering and Computer Science, ANU
local.contributor.affiliationSamundsett, Christian, College of Engineering and Computer Science, ANU
local.contributor.affiliationYan, Di, College of Engineering and Computer Science, ANU
local.contributor.affiliationAllen, Thomas, College of Engineering and Computer Science, ANU
local.contributor.affiliationPeng, Jun, College of Engineering and Computer Science, ANU
local.contributor.affiliationCui, Jie (Jason), College of Engineering and Computer Science, ANU
local.contributor.affiliationZhang, Xinyu, College of Engineering and Computer Science, ANU
local.contributor.affiliationBullock, James, College of Engineering and Computer Science, ANU
local.contributor.affiliationCuevas, Andres, College of Engineering and Computer Science, ANU
local.bibliographicCitation.issue11
local.identifier.doi10.1063/1.4962960
dc.date.updated2018-11-29T07:41:28Z
local.identifier.scopusID2-s2.0-84988419070
local.identifier.thomsonID000384400300051
dcterms.accessRightsOpen Access
dc.provenancehttps://v2.sherpa.ac.uk/id/publication/9864..."The published version can be archived in an Institutional Repository" from SHERPA/RoMEO site (as at 15/09/2020).
CollectionsANU Research Publications

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