Thermoelectrical and optical properties of double wall carbon nanotubes: Polyaniline containing boron n-type organic semiconductors

The electrical conductivity, thermoelectrical, and optical properties of the polyaniline containing boron/double wall carbon nanotubes (CNTs) composites have been investigated. The electrical conductivities of the composites prepared with 1%, 5%, and 8% CNT concentrations at 300 K were found to be 5.31 ×10^-6, 2.72 × 10^-4, and 1.12 × 10^-3 (S/cm), respectively. The thermoelectrical results indicate that all the samples exhibit n-type electrical conductivity. The optical band gaps of the samples were found to be 3.71 eV for 0% DWNT, 3.32 eV for 1% DWNT, 3.15 eV for 5% DWNT, and 3.12 eV for 8% DWNT. The obtained results suggest that the electrical conductivity of PANI-B polymer is improved by DWNT doping.