Selective Optical Switching of Interface-Coupled Relaxation Dynamics in Carbon Nanotube-Si Heterojunctions

Stefano Ponzoni; Gianluca Galimberti; Luigi Ermenegildo Sangaletti; P. Castrucci; S. Del Gobbo; M. Morbidoni; M. Scarselli; Stefania Pagliara

doi:10.1021/jp506684b

Selective Optical Switching of Interface-Coupled Relaxation Dynamics in Carbon Nanotube-Si Heterojunctions

Stefano Ponzoni, Gianluca Galimberti, Luigi Ermenegildo Sangaletti, P. Castrucci, S. Del Gobbo, M. Morbidoni, M. Scarselli, Stefania Pagliara

Risultato della ricerca: Contributo in rivista › Articolo in rivista › peer review

9 Citazioni (Scopus)

Abstract

By properly tuning the photon energy of a femtosecond laser pump, we disentangle, in carbon nanotubeSi (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.

Lingua originale	English
pagine (da-a)	24110-24116
Numero di pagine	7
Rivista	JOURNAL OF PHYSICAL CHEMISTRY. C.
Volume	118
DOI	https://doi.org/10.1021/jp506684b
Stato di pubblicazione	Pubblicato - 2014

Keywords

EFFICIENCY
SILICON
SOLAR-CELLS

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10.1021/jp506684b

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abstract = "By properly tuning the photon energy of a femtosecond laser pump, we disentangle, in carbon nanotubeSi (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.",

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author = "Stefano Ponzoni and Gianluca Galimberti and Sangaletti, {Luigi Ermenegildo} and P. Castrucci and {Del Gobbo}, S. and M. Morbidoni and M. Scarselli and Stefania Pagliara",

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T1 - Selective Optical Switching of Interface-Coupled Relaxation Dynamics in Carbon Nanotube-Si Heterojunctions

AU - Ponzoni, Stefano

AU - Galimberti, Gianluca

AU - Sangaletti, Luigi Ermenegildo

AU - Castrucci, P.

AU - Del Gobbo, S.

AU - Morbidoni, M.

AU - Scarselli, M.

AU - Pagliara, Stefania

PY - 2014

Y1 - 2014

N2 - By properly tuning the photon energy of a femtosecond laser pump, we disentangle, in carbon nanotubeSi (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 nanotubeSi (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.

KW - EFFICIENCY

KW - SILICON

KW - SOLAR-CELLS

KW - EFFICIENCY

KW - SILICON

KW - SOLAR-CELLS

UR - http://hdl.handle.net/10807/68533

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DO - 10.1021/jp506684b

M3 - Article

SN - 1932-7455

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JO - JOURNAL OF PHYSICAL CHEMISTRY. C.

JF - JOURNAL OF PHYSICAL CHEMISTRY. C.

ER -

Selective Optical Switching of Interface-Coupled Relaxation Dynamics in Carbon Nanotube-Si Heterojunctions

Abstract

Keywords

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