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Open Access Highly Accessed Nano Express

Synthesis and Thermoelectric Properties of Bi2Se3 Nanostructures

K Kadel1, Latha Kumari1, WZ Li1*, Jian Yu Huang2 and Paula P Provencio2

Author Affiliations

1 Department of Physics, Florida International University, Miami, FL 33199, USA

2 Sandia National Laboratories, Center for Integrated Nanotechnologies (CINT), Albuquerque, NM 87185, USA

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Nanoscale Res Lett 2011, 6:57  doi:10.1007/s11671-010-9795-7

Published: 1 October 2010

Abstract

Bismuth selenide (Bi2Se3) nanostructures were synthesized via solvothermal method. The crystallinity of the as-synthesized sample has been analyzed by X-ray diffraction, which shows the formation of rhombohedral Bi2Se3. Electron microscopy examination indicates that the Bi2Se3 nanoparticles have hexagonal flake-like shape. The effect of the synthesis temperature on the morphology of the Bi2Se3 nanostructures has also been investigated. It is found that the particle size increases with the synthesis temperature. Thermoelectric properties of the Bi2Se3 nanostructures were also measured, and the maximum value of dimensionless figure of merit (ZT) of 0.096 was obtained at 523 K.

Keywords:
Bismuth selenide; Nanoflakes; Solvothermal synthesis; Power factor; Figure of merit