scholarly journals Exciton diffusion in semiconducting single-walled carbon nanotubes studied by transient absorption microscopy

2012 ◽  
Vol 86 (20) ◽  
Author(s):  
Brian A. Ruzicka ◽  
Rui Wang ◽  
Jessica Lohrman ◽  
Shenqiang Ren ◽  
Hui Zhao
Keyword(s):  
Carbon Nanotubes ◽  
Transient Absorption ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Exciton Diffusion ◽  
Walled Carbon Nanotubes

scholarly journals Exciton Diffusion in Air-Suspended Single-Walled Carbon Nanotubes

2010 ◽  
Vol 104 (24) ◽  
Author(s):  
S. Moritsubo ◽  
T. Murai ◽  
T. Shimada ◽  
Y. Murakami ◽  
S. Chiashi ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Exciton Diffusion ◽  
Walled Carbon Nanotubes

scholarly journals Many-particle excitations in non-covalently doped single-walled carbon nanotubes

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Timofei V. Eremin ◽  
Petr A. Obraztsov ◽  
Vladimir A. Velikanov ◽  
Tatiana V. Shubina ◽  
Elena D. Obraztsova
Keyword(s):  
Carbon Nanotubes ◽  
Transient Absorption ◽  
Energy State ◽  
Energy Levels ◽  
Optical Excitation ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
New Energy ◽  
Walled Carbon Nanotubes ◽  
Kinetics Of

Abstract Doping of single-walled carbon nanotubes leads to the formation of new energy levels which are able to participate in optical processes. Here, we investigate (6,5)-single walled carbon nanotubes doped in a solution of hydrochloric acid using optical absorption, photoluminescence, and pump-probe transient absorption techniques. We find that, beyond a certain level of doping, the optical spectra of such nanotubes exhibit the spectral features related to two doping-induced levels, which we assign to a localized exciton $$X$$ X and a trion T, appearing in addition to an ordinary exciton $${E}_{1}$$ E 1 . We evaluate the formation and relaxation kinetics of respective states and demonstrate that the kinetics difference between E1 and X energy levels perfectly matches the kinetics of the state T. This original finding evidences the formation of trions through nonradiative relaxation via the $$X$$ X level, rather than via a direct optical excitation from the ground energy state of nanotubes.

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