Nonlinear Photoluminescence Properties of Trions in Hole-doped Single-walled Carbon Nanotubes

Abstract

We studied the excitation density dependence of photoluminescence (PL) spectra of excitons and trions (charged excitons) in hole-doped single-walled carbon nanotubes. We found that the PL intensity of trions exhibited a strong nonlinear saturation behavior as the excitation density increased, whereas that of excitons exhibited a weak sublinear behavior. The strong PL saturation of trions is attributed to depletion of doped holes that are captured by excitons in the formation processes. Moreover, the effective radiative lifetime of a trion was evaluated to be approximately 20 ns.

19 pages, 4 figures in main text and 10 pages, 4 figures in supplemental material

References in corpus (3)

• Exciton binding energies in carbon nanotubes from two-photon photoluminescence
• Nonlinear Photoluminescence Excitation Spectroscopy of Carbon Nanotubes: Exploring the Upper Density Limit of One-Dimensional Excitons
• Correlation and dimensional effects of trions in carbon nanotubes

Cited by in corpus (4)

• Gate-voltage induced trions in suspended carbon nanotubes
• Many-body theory of optical absorption in doped two-dimensional semiconductors
• Trion-based High-speed Electroluminescence from Semiconducting Carbon Nanotube Films
• Spectroscopic signatures of many-particle energy levels in non-covalently doped single-wall carbon nanotubes