Single-particle studies of band alignment effects on electron transfer dynamics from semiconductor hetero-nanostructures to single-walled carbon nanotubes

Chi Tsu Yuan, Yong Gang Wang, Kuo Yen Huang, Ting Yu Chen, Pyng Yu, Jau Tang, Amit Sitt, Uri Banin, Oded Millo

Research output: Contribution to journalArticlepeer-review

Abstract

Figure Persented: We utilize single-molecule spectroscopy combined with time-correlated single-photon counting to probe the electron transfer (ET) rates from various types of semiconductor hetero-nanocrystals, having either type-I or type-II band alignment, to single-walled carbon nanotubes. A significantly larger ET rate was observed for type-II ZnSe/CdS dot-in-rod nanostructures as compared to type-I spherical CdSe/ZnS core/shell quantum dots and to CdSe/CdS dot-in-rod structures. Furthermore, such rapid ET dynamics can compete with both Auger and radiative recombination processes, with significance for effective photovoltaic operation.

Original languageEnglish
Pages (from-to)176-182
Number of pages7
JournalACS Nano
Volume6
Issue number1
DOIs
StatePublished - 24 Jan 2012
Externally publishedYes

Keywords

  • carbon nanotubes
  • colloidal nanocrystals
  • single-molecule spectroscopy

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