Scaling of excitons in carbon nanotubes

TL;DR

This paper investigates how exciton properties in carbon nanotubes scale with radius and dielectric environment, providing simple relationships that describe binding energy, size, and oscillator strength.

Contribution

It introduces simple scaling laws for exciton properties in nanotubes across various radii and dielectric conditions, enhancing understanding of their optical behavior.

Findings

Scaling laws accurately describe exciton binding energy and size.

Exciton oscillator strength varies predictably with nanotube parameters.

Results aid in designing nanotube-based optoelectronic devices.

Abstract

Light emission from carbon nanotubes is expected to be dominated by excitonic recombination. Here we calculate the properties of excitons in nanotubes embedded in a dielectric, for a wide range of tube radii and dielectric environments. We find that simple scaling relationships give a good description of the binding energy, exciton size, and oscillator strength.