Exciton transition energy in photoluminescence of single-walled carbon nanotubes
نویسنده
چکیده
Photoluminescence excitation (PLE) spectroscopy of single-walled carbon nanotubes (SWNTs) has been extensively studied for characterization of their unique electronic properties due to the one-dimensionality. The precise evaluation of exciton transition energy is essential for experimental assignments of optical absorption, photoluminescence, and resonant Raman scatterings. Here, several experimental topics related to exciton transition energy observed photoluminescence spectroscopy are discussed, namely, excitonic phonon side-band, absorption of cross-polarized light, dielectric environmental effect. Detailed DFT-level theoretical studies are desired to understand and predict these phenomena.
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تاریخ انتشار 2007