McGinn, C.
, Harrington, D.
, Heilweil, E.
and Hacker, C.
(2024),
Spectroscopic Analysis of Polymer and Monolayer MoS2 Interfaces for Photodetection Applications, Applied Physics Letters, [online], https://doi.org/10.1063/5.0179156, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=956828
(Accessed December 15, 2024)
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Spectroscopic Analysis of Polymer and Monolayer MoS2 Interfaces for Photodetection Applications
Published
Author(s)
, Daniel Harrington, ,
Abstract
Polymer passivation has been leveraged to improve photodetection in two dimensional transition metal dichalcogenide field-effect transistors (2D TMD FETs). The relative passivation effects of common polymers, however, is not well understood. In this work, the interface of monolayer MoS2 and three common polymers, Parylene N (Pa-N), polymethyl methacrylate (PMMA), and polyvinylidene difluoride trifluoroethylene (PVDF-TrFE), is assessed with multiple spectroscopic methods. Raman and photoluminescence spectroscopy demonstrate that Pa-N and PMMA provide an n doping effect, which increases photoconductivity and photogenerated charge in Terahertz domain and time-resolved spectroscopy. Terahertz time-resolved spectroscopy shows significantly longer lifetime for only PVDF-TrFE. These results suggest that PVDF-TrFE provides a unique benefit for photodetection applications.Citation
Applied Physics Letters
Volume
124
Issue
1
Pub Type
Journals
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Created January 3, 2024, Updated January 17, 2024