Cited by 151Advanced Thermoelectric Materials and DevicesThermal properties of materialsThermal Radiation and Cooling Technologies

Thermal characterization of Bi2Te3/Sb2Te3 superlattices

Touzelbaev, M. N., Zhou, P., Venkatasubramanian, R., Goodson, K. E.·2001·Journal of Applied Physics

Abstract

Superlattices offer the potential to enhance the figure of merit for thermoelectric cooling by increasing the Seebeck coefficient while decreasing the thermal conductivity compared to bulk samples. The large bulk value of ZT makes superlattices containing Bi2Te3 attractive for demonstrating benefits of using low-dimensional materials in thermoelectric applications. The present work describes measurements of the effective thermal conductivity normal to Bi2Te3/Sb2Te3 superlattices deposited on GaAs using noncontact pulsed laser heating and thermoreflectance thermometry. The data show a strong reduction in the effective thermal conductivity of the Bi2Te3/Sb2Te3 superlattices compared to bulk Bi2Te3, which can further increase thermoelectric figure of merit. The dependence of thermal conductivity on superlattice period is found to be weak, particularly at periods above 60 Å. This indicates that disorder in Bi2Te3/Sb2Te3 superlattices may limit the heat conduction process at shorter periods than in Si/Ge superlattices, for which measurements were previously reported in the literature.

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Crossref · 10.1063/1.1374458

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Authors
Touzelbaev, M. N., Zhou, P., Venkatasubramanian, R., & Goodson, K. E.
Affiliations
  • Stanford University (US)
  • RTI International (US)
Venue
Journal of Applied Physics
Published
2001-07-15
Volume
90
Issue
2
Pages
763-767
ISSN
  • 0021-8979 (ISSN-L)
  • 1089-7550
OpenAlex
W1498657046
Cited by
151
References
18
Citations by year
2026: 3 · 2025: 8 · 2024: 4 · 2023: 6 · 2022: 5 · 2021: 5 · 2020: 5 · 2019: 8 · 2018: 8 · 2017: 7 · 2016: 9 · 2015: 8 · 2014: 6 · 2013: 7 · 2012: 8
FWCI
3.23
Type
journal article
Language
en
Open access
closed
Locations
Journal of Applied Physics (publishedVersion)
Topics
  • Physical Sciences › Materials Science › Materials Chemistry › Advanced Thermoelectric Materials and Devices
  • Physical Sciences › Materials Science › Materials Chemistry › Thermal properties of materials
  • Physical Sciences › Engineering › Civil and Structural Engineering › Thermal Radiation and Cooling Technologies
Keywords
thermal conductivity, figure of merit ZT, Seebeck coefficient, thermoelectric cooling, superlattice period, low-dimensional materials, GaAs substrate, pulsed laser heating

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