Electronic structure and thermoelectric properties of Bi2Te3 crystals and graphene-doped Bi2Te3

Authors

A.H Li, ISEM
Mahboobeh Shahbazi, University of WollongongFollow
Sihai Zhou, University of WollongongFollow
Guoxiu WangFollow
Chao Zhang, University of WollongongFollow
Priyanka JoodFollow
Germanas Peleckis, University of WollongongFollow
Yi Du, University of WollongongFollow
Zhenxiang Cheng, University of WollongongFollow
Xiaolin Wang, University of WollongongFollow
Y.K Kuo, National Dong Hwa University Taiwan

RIS ID

33969

Publication Details

Li, A., Shahbazi-Manshadi, M., Zhou, S., Wang, G., Zhang, C., Jood, P., Peleckis, G., Du, Y., Cheng, Z., Wang, P. Kuo, Y. (2010). Electronic structure and thermoelectric properties of Bi2Te3 crystals and graphene-doped Bi2Te3. Thin Solid Films, 518 (24, supplement 1), e57-e60.

Abstract

The electronic structure and thermoelectric properties of Bi₂Te₃ single crystals and graphene-doped Bi₂Te₃ polycrystalline samples were investigated with the aid of first-principles calculations, X-ray diffraction, scanning electron microscopy, Rietveld refinement, and thermal and transport measurements. It was found that the p electrons from the Bi and Te atoms are responsible for the density of states near the Fermi level. Experimental results show that the graphene-doped Bi₂Te₃ exhibits lower thermal conductivity and has a higher figure-of-merit than the single crystals.