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Exciton Dynamics in Suspended Monolayer and Few-Layer MoS2

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Optoelectronic Devices Based on Monolayer Transition Metal Dichalcogenides

Oriol López Sánchez

Monolayer transition metal dichalcogenides (TMD) such as molybdenum disulfide (MoS2), tungsten diselenide (WSe2) and tungsten disulfide (WS2), have shown in the last years remarkable physical properties. These direct badgap three-atoms thick monolayers, wi ...

EPFL2016

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Solution-processed semiconducting transition metal dichalcogenides are emerging as promising two-dimensional materials for photovoltaic and optoelectronic applications. Here, we have used transient absorption spectroscopy to provide unambiguous evidence an ...

American Chemical Society2016

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We report on vacuum ultraviolet (VUV) excited photoluminescence (PL) spectra emitted from a chemical vapor deposited MoS2 few-layered film. The excitation spectrum was recorded by monitoring intensities of PL spectra at similar to 1.9 eV. A strong wide exc ...

Institute of Physics2016

Magnetoexcitons in large area CVD-grown monolayer MoS2 and MoSe2 on sapphire

Andras Kis, Dumitru Dumcenco, Alessandro Surrente

Magnetotransmission spectroscopy was employed to study the valley Zeeman effect in large area monolayer MoS2 and MoSe2. The extracted values of the valley g factors for both A and B excitons were found to be similar with g(v) similar or equal to -4.5. The ...

Amer Physical Soc2016

Charge-transport properties of monolayer MoS2 at the interface with dielectric materials

Simone Bertolazzi

Two-dimensional (2D) semiconductors, consisting of single-sheets of layered transition metal dichalcogenides (TMD), are attracting enormous interest from both fundamental science and technology. Monolayer molybdenum disulfide (MoS2), a typical example from ...

EPFL2015

Single-Layer MoS2 Electronics

Andras Kis, Dominik Sebastian Lembke, Simone Bertolazzi

CONSPECTUS: Atomic crystals of two-dimensional materials consisting of single sheets extracted from layered materials are gaining increasing attention. The most well-known material from this group is graphene, a single layer of graphite that can be extract ...

2015

Large-Area Epitaxial Monolayer MoS2

Nicola Marzari, Anna Fontcuberta i Morral, Philippe Gillet, Aleksandra Radenovic, Andras Kis, Dumitru Dumcenco, Marco Gibertini, Yen-Cheng Kung, Oriol López Sánchez, Dmitry Ovchinnikov, Daria Krasnozhon, Simone Bertolazzi, Ming-Wei Chen, Kolyo Marinov

Two-dimensional semiconductors such as MoS2 are an emerging material family with wide-ranging potential applications in electronics, optoelectronics, and energy harvesting. Large-area growth methods are needed to open the way to applications. Control over ...

Amer Chemical Soc2015

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We report on the growth of molybdenum disulphide (MoS2) using H2S as a gas-phase sulfur precursor that allows controlling the domain growth direction of domains in both vertical (perpendicular to the substrate plane) and horizontal (within the substrate pl ...

2015

Piezoresistivity and Strain-induced Band Gap Tuning in Atomically Thin MoS2

Andras Kis, Adrien Victor Allain, Sajedeh Manzeli

Continuous tuning of material properties is highly desirable for a wide range of applications, with strain engineering being an interesting way of achieving it. The tuning range, however, is limited in conventional bulk materials that can suffer from plast ...

Amer Chemical Soc2015

Germanene: the germanium analogue of graphene

Magalí Alejandra Lingenfelder, Lei Zhang, Adil Acun

Recently, several research groups have reported the growth of germanene, a new member of the graphene family. Germanene is in many aspects very similar to graphene, but in contrast to the planar graphene lattice, the germanene honeycomb lattice is buckled ...

Institute of Physics2015