Synthesis and characterization of Bi2Te3/polyaniline composites

Abstract Bi 2 Te 3 flakes and rice-like polyaniline particles have been synthesized using hydrothermal and chemical oxidation routes, respectively, and the Bi 2 Te 3 /polyaniline composites were prepared by mechanical blending. The Bi 2 Te 3 /polyaniline composites exhibit an n-type conduction, and its Seebeck coefficient is similar to that of the Bi 2 Te 3 while the conductivity of the composites is almost the same with the polyaniline. As the synergistic effect of the Seebeck coefficient and the conductivity, the power factor of Bi 2 Te 3 /polyaniline composites is lower than that of the Bi 2 Te 3 or polyaniline, and remains almost unchanged with temperature.