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 -type dopants are added to carbon nanotube solutions, the photoluminescence and absorption peaks of the trions appear far below the 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.
- Received 13 September 2010
DOI:https://doi.org/10.1103/PhysRevLett.106.037404
© 2011 The American Physical Society
Viewpoint
A new quasiparticle in carbon nanotubes
Published 18 January 2011
Trions—one electron bound to two holes via Coulomb forces—can be observed in the optical spectra of doped carbon nanotubes.
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