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Article: Solution-processed core-shell nanowires for efficient photovoltaic cells

TitleSolution-processed core-shell nanowires for efficient photovoltaic cells
Authors
Issue Date2011
Citation
Nature Nanotechnology, 2011, v. 6 n. 9, p. 568-572 How to Cite?
AbstractSemiconductor nanowires are promising for photovoltaic applications 1-11, but, so far, nanowire-based solar cells have had lower efficiencies than planar cells made from the same materials 6-10,12,13, even allowing for the generally lower light absorption of nanowires. It is not clear, therefore, if the benefits of the nanowire structure, including better charge collection and transport and the possibility of enhanced absorption through light trapping 4,15, can outweigh the reductions in performance caused by recombination at the surface of the nanowires and at p-n junctions. Here, we fabricate core-shell nanowire solar cells with open-circuit voltage and fill factor values superior to those reported for equivalent planar cells, and an energy conversion efficiency of ∼5.4%, which is comparable to that of equivalent planar cells despite low light absorption levels 16. The device is made using a low-temperature solution-based cation exchange reaction 17-21 that creates a heteroepitaxial junction between a single-crystalline CdS core and single-crystalline Cu 2S shell. We integrate multiple cells on single nanowires in both series and parallel configurations for high output voltages and currents, respectively. The ability to produce efficient nanowire-based solar cells with a solution-based process and Earth-abundant elements could significantly reduce fabrication costs relative to existing high-temperature bulk material approaches. © 2011 Macmillan Publishers Limited. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/169607
ISSN
2015 Impact Factor: 35.267
2015 SCImago Journal Rankings: 19.832
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorTang, Jen_US
dc.contributor.authorHuo, Zen_US
dc.contributor.authorBrittman, Sen_US
dc.contributor.authorGao, Hen_US
dc.contributor.authorYang, Pen_US
dc.date.accessioned2012-10-25T04:53:39Z-
dc.date.available2012-10-25T04:53:39Z-
dc.date.issued2011en_US
dc.identifier.citationNature Nanotechnology, 2011, v. 6 n. 9, p. 568-572en_US
dc.identifier.issn1748-3387en_US
dc.identifier.urihttp://hdl.handle.net/10722/169607-
dc.description.abstractSemiconductor nanowires are promising for photovoltaic applications 1-11, but, so far, nanowire-based solar cells have had lower efficiencies than planar cells made from the same materials 6-10,12,13, even allowing for the generally lower light absorption of nanowires. It is not clear, therefore, if the benefits of the nanowire structure, including better charge collection and transport and the possibility of enhanced absorption through light trapping 4,15, can outweigh the reductions in performance caused by recombination at the surface of the nanowires and at p-n junctions. Here, we fabricate core-shell nanowire solar cells with open-circuit voltage and fill factor values superior to those reported for equivalent planar cells, and an energy conversion efficiency of ∼5.4%, which is comparable to that of equivalent planar cells despite low light absorption levels 16. The device is made using a low-temperature solution-based cation exchange reaction 17-21 that creates a heteroepitaxial junction between a single-crystalline CdS core and single-crystalline Cu 2S shell. We integrate multiple cells on single nanowires in both series and parallel configurations for high output voltages and currents, respectively. The ability to produce efficient nanowire-based solar cells with a solution-based process and Earth-abundant elements could significantly reduce fabrication costs relative to existing high-temperature bulk material approaches. © 2011 Macmillan Publishers Limited. All rights reserved.en_US
dc.languageengen_US
dc.relation.ispartofNature Nanotechnologyen_US
dc.titleSolution-processed core-shell nanowires for efficient photovoltaic cellsen_US
dc.typeArticleen_US
dc.identifier.emailTang, J: jinyao@hku.hken_US
dc.identifier.authorityTang, J=rp01677en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1038/nnano.2011.139en_US
dc.identifier.pmid21857684-
dc.identifier.scopuseid_2-s2.0-80052604854en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80052604854&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume6en_US
dc.identifier.issue9en_US
dc.identifier.spage568en_US
dc.identifier.epage572en_US
dc.identifier.isiWOS:000294550000013-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridTang, J=12791614900en_US
dc.identifier.scopusauthoridHuo, Z=8953609200en_US
dc.identifier.scopusauthoridBrittman, S=22633593700en_US
dc.identifier.scopusauthoridGao, H=14833931900en_US
dc.identifier.scopusauthoridYang, P=7403931988en_US
dc.identifier.citeulike11272103-

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