Abstract
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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