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

Stefano Ponzoni; Gianluca Galimberti; L. Sangaletti; Paola Castrucci; Silvano Del Gobbo; Maurizio Morbidoni; Manuela A. Scarselli; Stefania Pagliara

doi:10.1021/jp506684b

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

Stefano Ponzoni, Gianluca Galimberti, L. Sangaletti, Paola Castrucci, Silvano Del Gobbo, Maurizio Morbidoni, Manuela A. Scarselli, Stefania Pagliara

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

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.

Original language	English (US)
Pages (from-to)	24110-24116
Number of pages	7
Journal	The Journal of Physical Chemistry C
Volume	118
Issue number	41
DOIs	https://doi.org/10.1021/jp506684b
State	Published - Oct 6 2014

ASJC Scopus subject areas

Surfaces, Coatings and Films
General Energy
Physical and Theoretical Chemistry
Electronic, Optical and Magnetic Materials

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10.1021/jp506684b

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title = "Selective optical switching of interface-coupled relaxation dynamics in carbon nanotube-Si heterojunctions",

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.",

author = "Stefano Ponzoni and Gianluca Galimberti and L. Sangaletti and Paola Castrucci and {Del Gobbo}, Silvano and Maurizio Morbidoni and Scarselli, {Manuela A.} and Stefania Pagliara",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: 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.",

year = "2014",

month = oct,

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doi = "10.1021/jp506684b",

language = "English (US)",

volume = "118",

pages = "24110--24116",

journal = "The Journal of Physical Chemistry C",

issn = "1932-7447",

publisher = "American Chemical Society",

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TY - JOUR

T1 - Selective optical switching of interface-coupled relaxation dynamics in carbon nanotube-Si heterojunctions

AU - Ponzoni, Stefano

AU - Galimberti, Gianluca

AU - Sangaletti, L.

AU - Castrucci, Paola

AU - Del Gobbo, Silvano

AU - Morbidoni, Maurizio

AU - Scarselli, Manuela A.

AU - Pagliara, Stefania

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: 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.

PY - 2014/10/6

Y1 - 2014/10/6

N2 - 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.

AB - 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.

UR - http://hdl.handle.net/10754/563801

UR - https://pubs.acs.org/doi/10.1021/jp506684b

U2 - 10.1021/jp506684b

DO - 10.1021/jp506684b

M3 - Article

SN - 1932-7447

VL - 118

SP - 24110

EP - 24116

JO - The Journal of Physical Chemistry C

JF - The Journal of Physical Chemistry C

IS - 41

ER -

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

Abstract

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