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Photodetector of multilayer exfoliated MoS2 deposited on polyimide films
Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.ORCID iD: 0000-0001-9312-3672
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.ORCID iD: 0000-0003-2965-0288
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
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2018 (English)Conference paper, Poster (with or without abstract) (Other academic)
Abstract [en]

We fabricated a photodetector based on multilayer molybdenum disulfide (MoS2) by micromechanical cleavage of a molybdenite crystal using a polyimide film. We deposited 40 nm of gold by vacuum sputtering and copper tape was used for the contacts.  Without any surface treatment, we achieved high responsivity at different incident optical power. The calculated responsivity was 23 mA/W of incident optical power in the range between 400 and 800 nm. For the responsivity measurement it was estimated that MoS2 have a bandgap of 1.6 eV, which lies between monolayer and multilayer films. The thickness of the MoS2 thin film was determined by Raman spectroscopy evaluating the difference between the in plane  and out of plane  Raman modes. The measurement of IV curves indicated Ohmic contacts in respect to the Au regardless of the incident optical power. Our device fabrication was much simpler than previous reported devices and can be used to test the light absorption and luminescence capabilities of exfoliated MoS2.

Place, publisher, year, edition, pages
2018.
Keywords [en]
Photodetector, MoS2
National Category
Chemical Engineering Materials Engineering Physical Sciences
Identifiers
URN: urn:nbn:se:miun:diva-34035OAI: oai:DiVA.org:miun-34035DiVA, id: diva2:1229230
Conference
20th International Workshop on Radiation Imaging Detectors, Sundsvall, 24-28 June, 2018
Funder
Knowledge Foundation, 2600364Available from: 2018-06-29 Created: 2018-06-29 Last updated: 2018-08-16Bibliographically approved

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Forsberg, VivianeAndersson, HenrikEngholm, MagnusThungström, GöranZhang, RenyunHummelgård, MagnusOlin, HåkanNorgren, Magnus

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Forsberg, VivianeAndersson, HenrikEngholm, MagnusThungström, GöranZhang, RenyunHummelgård, MagnusOlin, HåkanNorgren, Magnus
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Department of Chemical EngineeringDepartment of Electronics DesignDepartment of Natural Sciences
Chemical EngineeringMaterials EngineeringPhysical Sciences

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