Large and tunable photo-thermoelectric effect in single-layer MoS2

Abstract

We study the photoresponse of single-layer MoS2 field-effect transistors by scanning photocurrent microscopy. We find that, unlike in many other semiconductors, the photocurrent generation in single-layer MoS2 is dominated by the photo-thermoelectric effect and not by the separation of photoexcited electron-hole pairs across the Schottky barriers at the MoS2/electrode interfaces. We observe a large value for the Seebeck coefficient for single-layer MoS2 that, by an external electric field, can be tuned between -4x10^2 uV/K and -1x10^5 uV/K. This large and tunable Seebeck coefficient of the single-layer MoS2 paves the way to new applications of this material such as on-chip thermopower generation and waste thermal energy harvesting.

arXiv commentSupporting information included

References in corpus (19)

• Electric Field Effect in Atomically Thin Carbon Films
• Two-Dimensional Gas of Massless Dirac Fermions in Graphene
• Atomically thin MoS2: A new direct-gap semiconductor
• Two Dimensional Atomic Crystals
• Anomalous Lattice Vibrations of Single and Few-Layer MoS2
• Single-Layer MoS2 Phototransistors
• Elastic properties of freely suspended MoS2 nanosheets
• Hot Carrier-Assisted Intrinsic Photoresponse in Graphene
• The Nature of Electronic States in Atomically Thin MoS2 Field-Effect Transistors
• Low-temperature photocarrier dynamics in monolayer MoS2
• Laser-thinning of MoS2: on demand generation of a single-layer semiconductor
• Photo-Thermoelectric Effect at a Graphene Interface Junction
• Photocurrent imaging and efficient photon detection in a graphene transistor
• Designing electrical contacts to MoS${}_2$ monolayers: A computational study
• Hot Carrier Transport and Photocurrent Response in Graphene
• MoS2 Dual-Gate MOSFET with Atomic-Layer-Deposited Al2O3 as Top-Gate Dielectric
• Optical identification of atomically thin dichalcogenide crystals
• Modulation of Thermoelectric Power of Individual Carbon Nanotubes
• Imaging the formation of a p-n junction in a suspended carbon nanotube with scanning photocurrent microscopy

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