Single-Crystal Layers of p- and n-type Bismuth Telluride Topological Insulators for Micro-Cooling Devices
DOI:
https://doi.org/10.63527/1607-8829-2025-4-53-63Keywords:
thermoelectric materials, topological insulators, layers, foil, single-crystal layers, Bi2Te3, Shubnikov-de Haas oscillations, charge carrier mobilities, cooling deviceAbstract
The paper presents the results of experimental studies of the thermoelectric properties and oscillation effects (Shubnikov-de Haas oscillations) of single-crystal layers of bismuth telluride topological insulators of p- and n-type without substrates, with thicknesses of 17 μm and 20 μm, respectively, obtained by mechanical exfoliation of layers from a single-crystal ingot of the corresponding composition using a technique developed by the authors of the article. Cyclotron masses and charge carrier quantum mobilities characteristic of surface states of topological insulators were estimated using experimental data on Shubnikov-de Haas oscillations in longitudinal (B||I) and transverse (B^I) magnetic fields up to 14 T. The force factor was calculated in the temperature range of 2–300 K from the temperature dependences of resistance and thermoelectric power. It was established that the maximum value of the power factor a2s was observed in the temperature range of 100 - 250 K and corresponds to the best maximum values available in the literature for perfect single crystals. Based on the obtained layers of Bi2Te3 p-type and n-type foil – Bi-17 at%, a design was created – a micro-cooling device that allows obtaining ΔT = 12o on the area of 0.01 cm2, which is an important factor for the development of new highly efficient thermoelectric materials based on thinner layers for their practical use in micro-coolers.
References
1. Rowe D. M. (2006). Thermoelectric waste heat recovery as a renewable energy source International Journal of Innovations in Energy Systems and Power, 1(1), 13-23.
2. Tritt T. M., Subramanian M. A. (2006). Thermoelectric materials, phenomena, and applications: a bird's eye view. MRS bulletin, 31 (03), 188198.
3. Dresselhaus M. S., Thomas I. L. (2001). Alternative energy technologies. Nature, 414 (6861), 332-337.
4. 6. Bell L. E. (2008). Cooling, heating, generating power, and recovering waste heat with thermoelectric systems. Science, 321(5895), 1457-1461.
5. DiSalvo F J. (1999). Thermoelectric cooling and power generation. Science, 285(5428), 703−706.
6. Venkatasubramanian R, Siivola E, Colpitts T, et al. (2001). Thin-film thermoelectric devices with high room-temperature figures of merit. Nature, 413(6856), 597−602.
7. Sales B C. (2002) Thermoelectric materials-smaller is cooler. Science, 295(5558), 1248−1249.
8. Dresselhaus M S, Chen G, Tang M Y, et al. (2007). New directions for low-dimensional thermoelectric materials. Adv. Mater., 19(8) ,1043-1053.
9. Fu L and Kane (2007). Topological insulators with inversion simmetry, Phys. Rev B , 76(4), 045402.
10. D.X. Qu, D.-X., Hor, Y.S., Xiong, J., Cava, R.J., et al. (2010). Quantum oscillations and Hall anomaly of surface states in the topological insulator Bi2Te3, Science, 329(5993), 821.
11. NIKOLAEVA Albina, MD, KONOPKO Leonid, MD, BODIUL Pavel, MD, GHERGHISAN Igor, COROMISLICENCO Tatiana, MD, PARA Gheorghe, MD. Metoda de obtinere a peliculelor monocristaline subtiri. Brevet MD 1366 Z 2020.03.31
12. NIKOLAEVA Albina, MD, KONOPKO Leonid, MD, GHERGHISAN Igor, MD, PARA Gheorghe, MD, COROMISLICENCO Tatiana, Procedeu de odținere a straturilor monocristaline subțiri de tipul Bi2Te3,Bi2Se3,Bi1-хSbх. Brevet MD 11818 Z 2025.08.31. MD.
13. Nikolaeva А. А., Konopko L.A., Gherghisan I., Rogatsky K., Stakhoviak R., Ezhovsky A., Shepelevich E., Prokoshin V., Gusakova S. (2018). Thermoelectric efficiency of foils of semi-metallic and semiconductor alloys Bi1-xSbx Low Temperature Physics, 44(8), 996-1003.
