Keywords:carbon nanotube, thermoelectric generation, n-type doping
Single-walled carbon nanotube (SWNT) is ideal materials for thermoelectric conversion because of their high Seebeck coefficient and electrical conductivity. Development of the wearable thermoelectric device using SWNTs is now investigated by taking advantage of their film toughness and flexibility. Up to date, π-shape structure has been proposed for the SWNT thermoelectric sheet. However, this structure needs to attach on a skin vertically and not preferable for the wearable application. Therefore, we proposed a new planar-type structure, in which the sheet can attach on the skin surface and preferable as a wearable device. Since sequential repeating of p-type and n-type properties are necessary for the devices, in this study, we investigated the patterned doping of p-type SWNT sheet into n-type. We found that the deposition of benzimidazole derivatives successfully turned un-masked area into n-type, giving a repeating of p and n-type structure.