Thermoelectric and Thermoresistive Effect in Bi2Se3: A Novel Dual-Mode Temperature and Heat Flux Sensor
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Date
2023-10
Publication Type
Journal Article
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yes
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Abstract
Here we present a sensor concept for simultaneous heat flux and temperature acquisition based on the thermoelectric and thermoresistive effect in n-type orthorhombic Bi2Se3. Measurements were performed in the 283-343 K temperature range. Temperature sensitivities as high as -36700 ppm/K (equivalent to a beta-value of 3260 K) and heat flux sensitivities of 0.125 mu V/(W/m(2)) were determined. The temperature and heat flux accuracies were found to be +/- 0.6 K and +/- 20 W (through a 1cm x 1cm area, equiv. to +/- 1 K) and the resolution was determined to be around 0.05 K. The underlying physical mechanisms were further investigated and a deep donor level with ionization energy of 0.292 eV was identified leading to a strong temperature-dependence of donor ionization. The presented device architecture has the potential to be utilized in applications where dual-mode simultaneous temperature and heat flux measurements are beneficial. [2023-0093]
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published
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Journal / series
Volume
32 (5)
Pages / Article No.
445 - 453
Publisher
IEEE
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Subject
Thermistors; Thermoelectric devices; Microsensors; Semiconductor materials; thermoresistivity; Electrochemical processes
Organisational unit
03609 - Hierold, Christofer / Hierold, Christofer
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Is supplemented by: https://doi.org/10.3929/ethz-b-000636958