Author:
Eremin Timofei V.,Obraztsov Petr A.,Velikanov Vladimir A.,Shubina Tatiana V.,Obraztsova Elena D.
Abstract
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.
Funder
Россий ский Фонд Фундаментальных Исследований
Russian Science Foundation
Academy of Finland
Publisher
Springer Science and Business Media LLC
Cited by
5 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献