A Low Resistance Calcium/Reduced Titania Passivated Contact for High Efficiency Crystalline Silicon Solar Cells

Handle URI:
http://hdl.handle.net/10754/623780
Title:
A Low Resistance Calcium/Reduced Titania Passivated Contact for High Efficiency Crystalline Silicon Solar Cells
Authors:
Allen, Thomas G.; Bullock, James; Jeangros, Quentin; Samundsett, Christian; Wan, Yimao; Cui, Jie; Hessler-Wyser, Aïcha; De Wolf, Stefaan ( 0000-0003-1619-9061 ) ; Javey, Ali; Cuevas, Andres
Abstract:
Recent advances in the efficiency of crystalline silicon (c-Si) solar cells have come through the implementation of passivated contacts that simultaneously reduce recombination and resistive losses within the contact structure. In this contribution, low resistivity passivated contacts are demonstrated based on reduced titania (TiOx) contacted with the low work function metal, calcium (Ca). By using Ca as the overlying metal in the contact structure we are able to achieve a reduction in the contact resistivity of TiOx passivated contacts of up to two orders of magnitude compared to previously reported data on Al/TiOx contacts, allowing for the application of the Ca/TiOx contact to n-type c-Si solar cells with partial rear contacts. Implementing this contact structure on the cell level results in a power conversion efficiency of 21.8% where the Ca/TiOx contact comprises only ≈6% of the rear surface of the solar cell, an increase of 1.5% absolute compared to a similar device fabricated without the TiOx interlayer.
KAUST Department:
KAUST Solar Center (KSC)
Citation:
Allen TG, Bullock J, Jeangros Q, Samundsett C, Wan Y, et al. (2017) A Low Resistance Calcium/Reduced Titania Passivated Contact for High Efficiency Crystalline Silicon Solar Cells. Advanced Energy Materials: 1602606. Available: http://dx.doi.org/10.1002/aenm.201602606.
Publisher:
Wiley-Blackwell
Journal:
Advanced Energy Materials
Issue Date:
4-Feb-2017
DOI:
10.1002/aenm.201602606
Type:
Article
ISSN:
1614-6832
Sponsors:
This work was supported by the Australian government through the Australian Renewable Energy Agency (ARENA). Work at the University of California, Berkeley was supported by the Bay Area Photovoltaic Consortium (BAPVC). The authors would like to acknowledge Sorin Lazar for his help with monochromated EELS experiments and the Interdisciplinary Centre For Electron Microscopy of EPFL for the use of their microscope.
Additional Links:
http://onlinelibrary.wiley.com/doi/10.1002/aenm.201602606/full
Appears in Collections:
Articles; Solar and Photovoltaic Engineering Research Center (SPERC)

Full metadata record

DC FieldValue Language
dc.contributor.authorAllen, Thomas G.en
dc.contributor.authorBullock, Jamesen
dc.contributor.authorJeangros, Quentinen
dc.contributor.authorSamundsett, Christianen
dc.contributor.authorWan, Yimaoen
dc.contributor.authorCui, Jieen
dc.contributor.authorHessler-Wyser, Aïchaen
dc.contributor.authorDe Wolf, Stefaanen
dc.contributor.authorJavey, Alien
dc.contributor.authorCuevas, Andresen
dc.date.accessioned2017-05-31T11:23:04Z-
dc.date.available2017-05-31T11:23:04Z-
dc.date.issued2017-02-04en
dc.identifier.citationAllen TG, Bullock J, Jeangros Q, Samundsett C, Wan Y, et al. (2017) A Low Resistance Calcium/Reduced Titania Passivated Contact for High Efficiency Crystalline Silicon Solar Cells. Advanced Energy Materials: 1602606. Available: http://dx.doi.org/10.1002/aenm.201602606.en
dc.identifier.issn1614-6832en
dc.identifier.doi10.1002/aenm.201602606en
dc.identifier.urihttp://hdl.handle.net/10754/623780-
dc.description.abstractRecent advances in the efficiency of crystalline silicon (c-Si) solar cells have come through the implementation of passivated contacts that simultaneously reduce recombination and resistive losses within the contact structure. In this contribution, low resistivity passivated contacts are demonstrated based on reduced titania (TiOx) contacted with the low work function metal, calcium (Ca). By using Ca as the overlying metal in the contact structure we are able to achieve a reduction in the contact resistivity of TiOx passivated contacts of up to two orders of magnitude compared to previously reported data on Al/TiOx contacts, allowing for the application of the Ca/TiOx contact to n-type c-Si solar cells with partial rear contacts. Implementing this contact structure on the cell level results in a power conversion efficiency of 21.8% where the Ca/TiOx contact comprises only ≈6% of the rear surface of the solar cell, an increase of 1.5% absolute compared to a similar device fabricated without the TiOx interlayer.en
dc.description.sponsorshipThis work was supported by the Australian government through the Australian Renewable Energy Agency (ARENA). Work at the University of California, Berkeley was supported by the Bay Area Photovoltaic Consortium (BAPVC). The authors would like to acknowledge Sorin Lazar for his help with monochromated EELS experiments and the Interdisciplinary Centre For Electron Microscopy of EPFL for the use of their microscope.en
dc.publisherWiley-Blackwellen
dc.relation.urlhttp://onlinelibrary.wiley.com/doi/10.1002/aenm.201602606/fullen
dc.titleA Low Resistance Calcium/Reduced Titania Passivated Contact for High Efficiency Crystalline Silicon Solar Cellsen
dc.typeArticleen
dc.contributor.departmentKAUST Solar Center (KSC)en
dc.identifier.journalAdvanced Energy Materialsen
dc.contributor.institutionResearch School of Engineering; Australian National University; Canberra 0200 Australiaen
dc.contributor.institutionDepartment of Electrical Engineering and Computer Sciences; University of California; Berkeley CA 94720 USAen
dc.contributor.institutionMaterials Sciences Division; Lawrence Berkeley National Laboratory; Berkeley CA 94720 USAen
dc.contributor.institutionDepartment of Physics; University of Basel; Klingelbergstrasse 82 Basel CH-4056 Switzerlanden
dc.contributor.institutionInstitute of Micro Engineering; Photovoltaics and Thin-Film Electronic Laboratory; École Polytechnique Fédérale de Lausanne; Maladière 71b CH-200 Neuchatel Switzerlanden
kaust.authorDe Wolf, Stefaanen
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