Bi2Te3 is a well-known n-type semiconductor for thermoelectric applications near room temperature. Nanoscale engineering of this material is predicted to lower its thermal conductivity which will further improve thermoelectric performance. Herein, we synthesized and characterized two-dimensional nanostructures of Bi2Te3 with varying morphologies. Bi2Te3 hexagonal nanoplates with and without nanopores were synthesized via solution route at 190°C with different ramping rates and reaction times to adjust morphology. Bi2Te3 nanoplates were then characterized with powder x-ray diffraction (PXRD) and scanning electron microscopy (SEM). The Bi2Te3 nanoplates are then consolidated into a pellet via spark plasma sintering (SPS). Lastly, the thermal conductivity of the Bi2Te3 nanoplate pellets were measured using laser flash analysis (LFA). Low thermal conductivity is achieved for both nanoplate morphologies.

Bi<sub>2</sub>Te<sub>3</sub> nanoplates for thermoelectric applications

ACS Spring 2022

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Bi2Te3 nanoplates for thermoelectric applications

Bi₂Te₃ nanoplates for thermoelectric applications