Near Unity Absorption in Van der Waals Semiconductors for Ultrathin Optoelectronics

Abstract

We demonstrate near unity, broadband absorbing optoelectronic devices using sub-15 nm thick transition metal dichalcogenides (TMDCs) of molybdenum and tungsten as van der Waals semiconductor active layers. Specifically, we report that near-unity light absorption is possible in extremely thin (< 15 nm) Van der Waals semiconductor structures by coupling to strongly damped optical modes of semiconductor/metal heterostructures. We further fabricate Schottky junction devices using these highly absorbing heterostructures and characterize their optoelectronic performance. Our work addresses one of the key criteria to enable TMDCs as potential candidates to achieve high optoelectronic efficiency.

Manuscript plus supplement. 5 figures in manuscript

References in corpus (5)

• Two Dimensional Atomic Crystals
• Atomically thin p-n junctions with van der Waals heterointerfaces
• Measurement of the optical dielectric function of transition metal dichalcogenide monolayers: MoS2, MoSe2, WS2 and WSe2
• Strong light-matter coupling in two-dimensional atomic crystals
• Hybrid, Gate-Tunable, van der Waals p-n Heterojunctions from Pentacene and MoS2

Cited by in corpus (20)

• Exciton physics and device application of two-dimensional transition metal dichalcogenide semiconductors
• Van der Waals Materials for Atomically-Thin Photovoltaics: Promise and Outlook
• High Photovoltaic Quantum Efficiency in Ultrathin van der Waals Heterostructures
• High-Specific-Power Flexible Transition Metal Dichalcogenide Solar Cells
• Enhanced Light-Matter Interaction in Two-Dimensional Transition Metal Dichalcogenides
• 2D MoS2-Graphene-based multilayer van der Waals heterostructures: Enhanced charge transfer and optical absorption, and electric-field tunable Dirac point and band gap
• Hybrid Exciton-Plasmon-Polaritons in van der Waals Semiconductor Gratings
• Mutual Photoluminescence Quenching and Photovoltaic Effect in Large-Area Single-Layer MoS2-Polymer Heterojunctions
• Exciton-Photonics: From Fundamental Science to Applications
• Near-unity light absorption in a monolayer WS2 van der Waals heterostructure cavity
• Cavity-Enhanced Linear Dichroism in a van der Waals Antiferromagnet
• High open-circuit voltage in transition metal dichalcogenide solar cells
• Self-Hybridized Polaritonic Emission from Layered Perovskites
• Perfect absorption by an atomically thin crystal
• Tailoring Infrared Absorption and Thermal Emission with Ultrathin-film Interferences in Epsilon-Near-Zero Media
• Near-unity light-matter interaction in mid-infrared van der Waals nanocavities
• Nanowire bolometer using a 2D high-temperature superconductor
• Strained 2D TMD lateral heterojunctions via grayscale thermal-Scanning Probe Lithography
• Impact of $A{l}_2{O}_3$ Passivation on the Photovoltaic Performance of Vertical $WS{e}_2$ Schottky Junction Solar Cells
• Enhanced Light Emission from the Ridge of Two-dimensional InSe Flakes