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

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

Risultato della ricerca: Contributo in rivistaArticolo in rivistapeer 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 originaleEnglish
pagine (da-a)24110-24116
Numero di pagine7
RivistaJOURNAL OF PHYSICAL CHEMISTRY. C.
Volume118
DOI
Stato di pubblicazionePubblicato - 2014

Keywords

  • EFFICIENCY
  • SILICON
  • SOLAR-CELLS

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