Influence of temperature and carrier density on the photoluminescence intensity of semiconductor carbon nanotubes. (February 2019)

• Record Type: Journal Article
• Authors: Van Tan, Le; Vy, Nguyen Duy; Cao, Huy Thien
• Is Part Of: Solid state communications. Volume 288(2019)
• Page Start: 5
• Page End: 9
• Publication Date: 2019-02
• Subjects: Carbon nanotube -- Bethe-Salpeter equation -- Photoluminescence -- Blue shift; Solid state chemistry -- Periodicals; Solid state physics -- Periodicals; Chimie de l'état solide -- Périodiques; Physique de l'état solide -- Périodiques; 530.41
• DOI: 10.1016/j.ssc.2018.11.001
• Languages: English
• ISSNs: 0038-1098

Abstract

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. Highlights: 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.