Sorting of Large-diameter Semiconducting Carbon Nanotubes for Near-infrared Phototransistors
발표자
()
초록
내용
Single-walled carbon nanotube (SWNT) is a promising building block for infrared (IR) detectors due to its strong optical absorption in IR wavelength region, excellent charge carrier mobility and solution processability. Since the optical band gap and exciton binding energy of semiconducting SWNTs (s-SWNTs) are inversely proportional to its diameter, it is advantageous to utilize large-diameter SWNTs for IR detectors. For the use of s-SWNTs, it is necessary to separate tubes with identical electrical properties (metallic or semiconducting) from as-synthesized SWNTs bundles. Here, we report the sorting technique of large-diameter s-SWNTs by conjugated polymers and high performances of SWNT IR phototransistors.