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Thermoelectric properties of n-type molybdenum disulfide (MoS2) thin film by using a simple measurement method
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för elektronikkonstruktion.
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för naturvetenskap. KTH, Wallenberg Wood Science Center, Stockholm.
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för elektronikkonstruktion.ORCID-id: 0000-0003-3769-8492
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för elektronikkonstruktion.
2019 (engelsk)Inngår i: Materials, ISSN 1996-1944, E-ISSN 1996-1944, Vol. 12, nr 21, artikkel-id 3521Artikkel i tidsskrift (Fagfellevurdert) 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. 

sted, utgiver, år, opplag, sider
2019. Vol. 12, nr 21, artikkel-id 3521
Emneord [en]
Exfoliated, Green energy harvesting, Molybdenite crystal, Molybdenum disulfide, MoS2, Seebeck coefficient, Thermoelectric generators, Thermoelectricity, Thin films
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URN: urn:nbn:se:miun:diva-37707DOI: 10.3390/ma12213521ISI: 000502798800062PubMedID: 31717822Scopus ID: 2-s2.0-85074668855OAI: oai:DiVA.org:miun-37707DiVA, id: diva2:1370871
Tilgjengelig fra: 2019-11-18 Laget: 2019-11-18 Sist oppdatert: 2020-01-16bibliografisk kontrollert

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