Observation of Charged Excitons in Hole-Doped Carbon Nanotubes Using Photoluminescence and Absorption Spectroscopy

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Abstract

We report the first observation of trions (charged excitons), three-particle bound states consisting of one electron and two holes, in hole-doped carbon nanotubes at room temperature. When p-type dopants are added to carbon nanotube solutions, the photoluminescence and absorption peaks of the trions appear far below the E11 bright exciton peak, regardless of the dopant species. The unexpectedly large energy separation between the bright excitons and the trions is attributed to the strong electron-hole exchange interaction in carbon nanotubes.

Journal

  • Physical Review Letters

    Physical Review Letters 106(3), 2011-01

    American Physical Society

Codes

  • NII Article ID (NAID)
    120002828932
  • NII NACSIS-CAT ID (NCID)
    AA00773679
  • Text Lang
    ENG
  • Article Type
    journal article
  • ISSN
    0031-9007
  • Data Source
    IR 
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