DOI: 10.1063/1.3147870. Thermoelectric properties of Bi–Te films with controlled structure and morphology

Thermoelectric properties of Bi–Te films with controlled structure and morphology

10.1063/1.3147870

Crossref journal-article

AIP Publishing

Journal of Applied Physics (317)

Abstract

A study of the thermoelectric transport properties of Bi–Te thin films with different structures and morphologies is here presented. Films were grown by pulsed laser deposition (PLD), which permits to control the composition, phase and crystallinity of the deposited material, and the morphology at the micrometer/nanometer scale. The carrier density and mobility at room temperature and the in plane electrical resistivity and Seebeck coefficient in the temperature range 300–400 K have been measured both for films characterized by a compact morphology and by the presence of different phases (Bi2Te3, BiTe, and Bi4Te3) and for Bi2Te3 films with different morphologies at the micrometer/nanometer scale (from a compact structure to a less connected assembly of randomly oriented crystalline grains). The correlation among thermoelectric and structural properties has been investigated, showing the potential of PLD to produce n-type Bi–Te thin films with desired properties for peculiar applications. Films with a layered Bi2Te3 structure show the best properties, with Seebeck coefficient in the range from −175 to −250 μV/K and power factor in the range 20–45 μW/cm K2, with expected ZT values greater than 1.5. Also films composed by partially randomly oriented submicrometer crystals look promising, since the smaller power factor (∼10 μW/cm K2) can in principle be compensated by a strong reduction of the phonon thermal conductivity via proper engineering of grain boundaries.

Bibliography

Li Bassi, A., Bailini, A., Casari, C. S., Donati, F., Mantegazza, A., Passoni, M., Russo, V., & Bottani, C. E. (2009). Thermoelectric properties of BiâTe films with controlled structure and morphology. Journal of Applied Physics, 105(12).

Authors 8

A. Li Bassi (first)
A. Bailini (additional)
C. S. Casari (additional)
F. Donati (additional)
A. Mantegazza (additional)
M. Passoni (additional)
V. Russo (additional)
C. E. Bottani (additional)

References 41 Referenced 94

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Dates

Type	When
Created	16 years, 1 month ago (June 23, 2009, 6:33 p.m.)
Deposited	2 years ago (Aug. 2, 2023, 6:04 a.m.)
Indexed	3 weeks, 2 days ago (July 30, 2025, 6:52 a.m.)
Issued	16 years, 2 months ago (June 15, 2009)
Published	16 years, 2 months ago (June 15, 2009)
Published Online	16 years, 1 month ago (June 23, 2009)
Published Print	16 years, 2 months ago (June 15, 2009)

Funders 0

None

BibTeX

@article{Li_Bassi_2009, title={Thermoelectric properties of Bi–Te films with controlled structure and morphology}, volume={105}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.3147870}, DOI={10.1063/1.3147870}, number={12}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Li Bassi, A. and Bailini, A. and Casari, C. S. and Donati, F. and Mantegazza, A. and Passoni, M. and Russo, V. and Bottani, C. E.}, year={2009}, month=jun }

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