Structure of Excited-State Transitions of Individual Semiconductor Nanocrystals Probed by Photoluminescence Excitation Spectroscopy

COVID-19 has impacted many institutions and organizations around the world, disrupting the progress of research

Han Htoon; Paris J. Cox; Victor I. Klimov

2004

Scholarcy highlights

  • COVID-19 has impacted many institutions and organizations around the world, disrupting the progress of research
  • We perform for the first time photoluminescence excitation studies of individual nanocrystals that reveal the structure of excited-state transitions not obscured by ensemble averaging
  • We detect only a few relatively narrow transitions at the band edge, while at higher spectral energies, we observe a broad structureless feature separated from the band-edge peaks by a >50meV “minigap.” These observations can be rationalized by analyzing hole intraband relaxation behavior
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