Influence of temperature and carrier density on the photoluminescence intensity of Carbon Nanotubes

What is it about?

The role of temperature and carrier density in the photoluminescence (PL) properties of single-walled carbon nanotubes (SWNTs) is theoretically studied by solving the Bethe-Salpeter equation. Especially, the calculation of PL peak position and height for various carrier densities shows a good agreement with experimental results. The peak position and width show a moderate dependence while the intensity presents a strong dependence on temperature and density where a blue shift and intensity enhancement at low temperature are seen. These results help confirming the role of Coulomb effects on the optical transition in SWNTs.

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Why is it important?

• Theoretical calculation of photoluminescence (PL) of carbon nanotubes has been done. • Contributions of carriers are studied by solving the Bethe-Salpeter equation. • PL behavior, peak position and width, shows good agreement with experimental results.