Selective optical switching of interface-coupled relaxation dynamics in carbon nanotube-Si heterojunctions

Handle URI:
http://hdl.handle.net/10754/563801
Title:
Selective optical switching of interface-coupled relaxation dynamics in carbon nanotube-Si heterojunctions
Authors:
Ponzoni, Stefano; Galimberti, Gianluca; Sangaletti, L.; Castrucci, Paola; Del Gobbo, Silvano; Morbidoni, Maurizio; Scarselli, Manuela A.; Pagliara, Stefania
Abstract:
By properly tuning the photon energy of a femtosecond laser pump, we disentangle, in carbon nanotube-Si (CNT/Si) heterojunctions, the fast relaxation dynamics occurring in CNT from the slow repopulation dynamics due to hole charge transfer at the junction. In this way we are able to track the transfer of the photogenerated holes from the Si depletion layer to the CNT layer, under the action of the built-in heterojunction potential. This also clarifies that CNT play an active role in the junction and do not act only as channels for charge collection and transport.
KAUST Department:
Solar and Photovoltaic Engineering Research Center (SPERC)
Publisher:
American Chemical Society (ACS)
Journal:
The Journal of Physical Chemistry C
Issue Date:
16-Oct-2014
DOI:
10.1021/jp506684b
Type:
Article
ISSN:
19327447
Sponsors:
S.Pa., L.S., and S.P. thank the MIUR for supporting this work under Contract PRIN 2010BNZ3F2. S.Pa. acknowledges partial support from D.2.2 grants of the UCSC.
Appears in Collections:
Articles; Solar and Photovoltaic Engineering Research Center (SPERC)

Full metadata record

DC FieldValue Language
dc.contributor.authorPonzoni, Stefanoen
dc.contributor.authorGalimberti, Gianlucaen
dc.contributor.authorSangaletti, L.en
dc.contributor.authorCastrucci, Paolaen
dc.contributor.authorDel Gobbo, Silvanoen
dc.contributor.authorMorbidoni, Maurizioen
dc.contributor.authorScarselli, Manuela A.en
dc.contributor.authorPagliara, Stefaniaen
dc.date.accessioned2015-08-03T12:10:36Zen
dc.date.available2015-08-03T12:10:36Zen
dc.date.issued2014-10-16en
dc.identifier.issn19327447en
dc.identifier.doi10.1021/jp506684ben
dc.identifier.urihttp://hdl.handle.net/10754/563801en
dc.description.abstractBy properly tuning the photon energy of a femtosecond laser pump, we disentangle, in carbon nanotube-Si (CNT/Si) heterojunctions, the fast relaxation dynamics occurring in CNT from the slow repopulation dynamics due to hole charge transfer at the junction. In this way we are able to track the transfer of the photogenerated holes from the Si depletion layer to the CNT layer, under the action of the built-in heterojunction potential. This also clarifies that CNT play an active role in the junction and do not act only as channels for charge collection and transport.en
dc.description.sponsorshipS.Pa., L.S., and S.P. thank the MIUR for supporting this work under Contract PRIN 2010BNZ3F2. S.Pa. acknowledges partial support from D.2.2 grants of the UCSC.en
dc.publisherAmerican Chemical Society (ACS)en
dc.titleSelective optical switching of interface-coupled relaxation dynamics in carbon nanotube-Si heterojunctionsen
dc.typeArticleen
dc.contributor.departmentSolar and Photovoltaic Engineering Research Center (SPERC)en
dc.identifier.journalThe Journal of Physical Chemistry Cen
dc.contributor.institutionI-LAMP, Dipartimento di Matematica e Fisica, Università CattolicaBrescia, Italyen
dc.contributor.institutionDipartimento di Fisica, Università di Roma Tor VergataRome, Italyen
dc.contributor.institutionDepartment of Materials, Imperial College LondonLondon, United Kingdomen
kaust.authorDel Gobbo, Silvanoen
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