Dynamics of charged excitons in electronically and morphologically homogeneous single-walled carbon nanotubes.

ABSTRACT: The trion, a three-body charge-exciton bound state, offers unique opportunities to simultaneously manipulate charge, spin, and excitation in one-dimensional single-walled carbon nanotubes (SWNTs) at room temperature. Effective exploitation of trion quasi-particles requires fundamental insight into their creation and decay dynamics. Such knowledge, however, remains elusive for SWNT trion states, due to the electronic and morphological heterogeneity of commonly interrogated SWNT samples, and the fact that transient spectroscopic signals uniquely associated with the trion state have not been identified. Here, we prepare length-sorted SWNTs and precisely control charge-carrier-doping densities to determine trion dynamics using femtosecond pump-probe spectroscopy. Identification of the trion tr

SUBMITTER: Bai Y 

PROVIDER: S-EPMC5789916 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature