Synthesis, Evolution of Morphology, Transport Properties for Bi2Te3 Nanoplates

Bi2Te3 has an extensive application as thermoelectric materials. Here, large scale single-crystal hexagonal nanoplates(NPs) with size of 0.4–0.8 μm were synthesized successfully by hydro-thermal method. X-ray diffraction (XRD), scanning electron microscope (SEM), and transmission (TEM) used to characterize the nanoplates, which confirm single crystal quality smooth surface morphology size. We discussed morphology-evolution in detail influence various reaction factors including: temperature, time, surfactants polyvinyl pyrrolidone (PVP) pH value. The synthesis method is not only green, but also shortens time improves efficiency. nanopowders hot-pressed into solid state pellets through spark plasma sintering (SPS). values electrical conductivity σ about 0.16 × 10−5 Sm−1 0.22 at room temperature 530 K, respectively. Seebeck coefficient S around −81 μVK−1 −118