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Thermoelectric properties of n-type molybdenum disulfide (MoS2) thin film by using a simple measurement method
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences. KTH, Wallenberg Wood Science Center, Stockholm.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.ORCID iD: 0000-0003-3769-8492
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
2019 (English)In: Materials, ISSN 1996-1944, E-ISSN 1996-1944, Vol. 12, no 21, article id 3521Article in journal (Refereed) Published
Abstract [en]

In this paper, a micrometre thin film of molybdenum disulfide (MoS2) is characterized for thermoelectric properties. The sample was prepared through mechanical exfoliation of a molybdenite crystal. The Seebeck coefficient measurement was performed by generating a temperature gradient across the sample and recording the induced electrical voltage, and for this purpose a simple measurement setup was developed. In the measurement, platinum was utilized as reference material in the electrodes. The Seebeck value of MoS2 was estimated to be approximately -600 μV/K at a temperature difference of 40 °C. The negative sign indicates that the polarity of the material is n-type. For measurement of the thermal conductivity, the sample was sandwiched between the heat source and the heat sink, and a steady-state power of 1.42Wwas provided while monitoring the temperature difference across the sample. Based on Fourier's law of conduction, the thermal conductivity of the sample was estimated to be approximately 0.26 Wm-1 K-. The electrical resistivity was estimated to be 29 W cm. The figure of merit of MoS2 was estimated to be 1.99 × 10-4. 

Place, publisher, year, edition, pages
2019. Vol. 12, no 21, article id 3521
Keywords [en]
Exfoliated, Green energy harvesting, Molybdenite crystal, Molybdenum disulfide, MoS2, Seebeck coefficient, Thermoelectric generators, Thermoelectricity, Thin films
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:miun:diva-37707DOI: 10.3390/ma12213521Scopus ID: 2-s2.0-85074668855OAI: oai:DiVA.org:miun-37707DiVA, id: diva2:1370871
Available from: 2019-11-18 Created: 2019-11-18 Last updated: 2019-11-18Bibliographically approved

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Ashraf, ShakeelForsberg, VivianeMattsson, Claes G.Thungström, Göran
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