Investigation of optoelectronic properties in the Potassium intercalated carbon nanotube

Carbon nanotubes (CNTs) are attractive to both fundamental science and technology. The fascinating characteristics make carbon nanotubes the focus of current nanoscience and nanotechnology with manypotential applications, including nano optoelectronic devices, photonic devices, field emitters, energystorage medium, chemical sensors and biosensors and optical communications [1].Designing nanotubebased nanoscale materials and devices requires the controllable modification of the physical andchemical properties of carbon nanotubes. In experiments, the chemical modification of carbonnanotubes can be realized by a variety of approaches [2], such as intercalation of electron donors like alkali metal or acceptors like halogen [3]. The deliberate introduction of impurities (dopants) into carbon nanotube could offer a possible route to change and tune its electronic properties. Alkali-metal such as potassium intercalated CNT are a compound system with a faceted variety of tunable vibronicand electronic properties [4].We present studies of the electronic structure and optoelectronic properties of potassium intercalated CNT.

Keywords:

Carbon nanotube , Non-Equilibrium Green’s Function , Density Functional Theory , TranSIESTA