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14 papers
Trions, Exciton Dynamics and Spectral Modifications in Doped Carbon Nanotubes: A Singular Defect-Driven Mechanism
Klaus H. Eckstein, Pascal Kunkel, Markus Voelckel +2
Doping substantially influences the electronic and photophysical properties of semiconducting single-wall carbon nanotubes (s-SWNTs). Although prior studies have noted that surplus…
Diffusive and Unimolecular Nonradiative Decay of Excited States in Doped Carbon Nanotubes
Klaus H. Eckstein, Pascal Kunkel, Markus Voelckel +4
Doping can profoundly affect the electronic- and optical-structure of semiconductors. Here we address the effect of surplus charges on non-radiative (NR) exciton and trion decay in…
Infrared Study of Charge Carrier Confinement in Doped (6,5) Carbon Nanotubes
Klaus H. Eckstein, Florian Hirsch, Richard Martel +1
Electronic degrees of freedom and their coupling to lattice vibrations in semiconductors can be strongly modified by doping. Accordingly, the addition of surplus charge carriers to…
Quantifying Doping Levels in Carbon Nanotubes by Optical Spectroscopy
Klaus H. Eckstein, Florian Oberndorfer, Melanie M. Achsnich +2
Controlling doping is essential for a successful integration of semiconductor materials into device technologies. However, the assessment of doping levels and the distribution of c…
High energetic excitons in carbon nanotubes directly probe charge-carriers
Giancarlo Soavi, Francesco Scotognella, Daniele Viola +4
Theory predicts peculiar features for excited-state dynamics in one dimension (1D) that are difficult to be observed experimentally. Single-walled carbon nanotubes (SWNTs) are an e…
Excitation and recombination dynamics of vacancy-related spin centers in silicon carbide
T. C. Hain, F. Fuchs, V. A. Soltamov +4
We generate silicon vacancy related defects in high-quality epitaxial silicon carbide layers by means of electron irradiation. By controlling the irradiation fluence, the defect co…