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Photodetector of multilayer exfoliated MoS2 deposited on polyimide films
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- Forsberg, Viviane, 1981- (author)
- Mittuniversitetet,Avdelningen för kemiteknik
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- Andersson, Henrik, 1975- (author)
- Mittuniversitetet,Avdelningen för elektronikkonstruktion
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- Engholm, Magnus (author)
- Mittuniversitetet,Avdelningen för elektronikkonstruktion
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- (creator_code:org_t)
- 2018
- 2018
- English.
- Conference paper (other academic/artistic)
Abstract
Subject headings
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- 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.
Subject headings
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Keyword
- Photodetector
- MoS2
Publication and Content Type
- vet (subject category)
- kon (subject category)
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