Benjamin Grévin
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View article: Dual-heterodyne Kelvin probe force microscopy
Dual-heterodyne Kelvin probe force microscopy Open
We present a new open-loop implementation of Kelvin probe force microscopy (KPFM) that provides access to the Fourier spectrum of the time-periodic surface electrostatic potential generated under optical (or electrical) pumping with an ato…
View article: A simple KPFM-based approach for electrostatic- free topographic measurements: the case of MoS<sub>2</sub> on SiO<sub>2</sub>
A simple KPFM-based approach for electrostatic- free topographic measurements: the case of MoS<sub>2</sub> on SiO<sub>2</sub> Open
A simple implementation of Kelvin probe force microscopy (KPFM) is reported that enables recording topographic images in the absence of any component of the electrostatic force (including the static term). Our approach is based on a close …
View article: CCDC 2226762: Experimental Crystal Structure Determination
CCDC 2226762: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2226764: Experimental Crystal Structure Determination
CCDC 2226764: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2226763: Experimental Crystal Structure Determination
CCDC 2226763: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Star-shape non-fullerene acceptor featuring an aza-triangulene core for organic solar cells
Star-shape non-fullerene acceptor featuring an aza-triangulene core for organic solar cells Open
A novel star-shape non-fullerene acceptor containing an aza-triangulene core is synthesized, characterized and used in inverted organic solar cells.
View article: A simple KPFM-based approach for electrostatic-free topographic measurements: the case of MoS$_2$ on SiO$_2$
A simple KPFM-based approach for electrostatic-free topographic measurements: the case of MoS$_2$ on SiO$_2$ Open
A simple implementation of Kelvin probe force microscopy is reported that enables recording topographic images in the absence of any component of the electrostatic force. Our approach is based on a close loop z-spectroscopy operated in dat…
View article: Hidden surface photovoltages revealed by pump probe KPFM
Hidden surface photovoltages revealed by pump probe KPFM Open
In this work, we use pump-probe Kelvin probe force microscopy (pp-KPFM) in combination with non-contact atomic force microscopy (nc-AFM) under ultrahigh vacuum, to investigate the nature of the light-induced surface potential dynamics in a…
View article: New approach for the molecular beam epitaxy growth of scalable WSe <sub>2</sub> monolayers
New approach for the molecular beam epitaxy growth of scalable WSe <sub>2</sub> monolayers Open
The search for high-quality transition metal dichalcogenides mono- and multi-layers grown on large areas is still a very active field of investigation. Here, we use molecular beam epitaxy to grow WSe 2 on 15 × 15 mm large mica in the van d…
View article: Charge transfers and charged defects in WSe <sub>2</sub> /graphene-SiC interfaces
Charge transfers and charged defects in WSe <sub>2</sub> /graphene-SiC interfaces Open
We report on Kelvin probe force microscopy (KPFM) and density functional theory (DFT) investigations of charge transfers in vertical heterojunctions between tungsten diselenide (WSe 2 ) layers and graphene on silicon carbide substrates. Th…
View article: Implementation of data-cube pump–probe KPFM on organic solar cells
Implementation of data-cube pump–probe KPFM on organic solar cells Open
An implementation of pump–probe Kelvin probe force microscopy (pp-KPFM) is reported that enables recording the time-resolved surface potential in single-point mode or over a 2D grid. The spectroscopic data are acquired in open z -loop conf…
View article: New approach for the molecular beam epitaxy growth of scalable single-crystalline WSe$_2$ monolayers
New approach for the molecular beam epitaxy growth of scalable single-crystalline WSe$_2$ monolayers Open
The search for high-quality transition metal dichalcogenides mono- and multi-layers grown on large areas is still a very active field of investigation nowadays. Here, we use molecular beam epitaxy to grow 15$\times$15 mm large WSe$_2$ on m…
View article: Scanning probe microscopy for energy-related materials
Scanning probe microscopy for energy-related materials Open
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View article: A scanning probe microscopy study of nanostructured TiO<sub>2</sub>/poly(3-hexylthiophene) hybrid heterojunctions for photovoltaic applications
A scanning probe microscopy study of nanostructured TiO<sub>2</sub>/poly(3-hexylthiophene) hybrid heterojunctions for photovoltaic applications Open
The nanoscale morphology of photoactive hybrid heterojunctions plays a key role in the performances of hybrid solar cells. In this work, the heterojunctions consist of a nanocolumnar TiO 2 surface covalently grafted with a monolayer of pol…
View article: Numerical analysis of single-point spectroscopy curves used in photo-carrier dynamics measurements by Kelvin probe force microscopy under frequency-modulated excitation
Numerical analysis of single-point spectroscopy curves used in photo-carrier dynamics measurements by Kelvin probe force microscopy under frequency-modulated excitation Open
In recent years, the investigation of the complex interplay between the nanostructure and photo-transport mechanisms has become of crucial importance for the development of many emerging photovoltaic technologies. In this context, Kelvin p…
View article: Multimodal noncontact atomic force microscopy and Kelvin probe force microscopy investigations of organolead tribromide perovskite single crystals
Multimodal noncontact atomic force microscopy and Kelvin probe force microscopy investigations of organolead tribromide perovskite single crystals Open
In this work, methylammonium lead tribromide (MAPbBr 3 ) single crystals are studied by noncontact atomic force microscopy (nc-AFM) and Kelvin probe force microscopy (KPFM). We demonstrate that the surface photovoltage and crystal photostr…
View article: Calibrated work function mapping by Kelvin probe force microscopy
Calibrated work function mapping by Kelvin probe force microscopy Open
We propose and demonstrate the implementation of an alternative work function tip calibration procedure for Kelvin probe force microscopy under ultrahigh vacuum, using monocrystalline metallic materials with known crystallographic orientat…
View article: Kelvin Probe Force Microscopy Characterization of Organic and Hybrid Perovskite Solar Cells
Kelvin Probe Force Microscopy Characterization of Organic and Hybrid Perovskite Solar Cells Open
Nowadays, solution processed solar cells based on organic and hybrid-perovskite semi-conductors are serious competitors for silicon-based and inorganic photovoltaic technologies in terms of production costs, performance to weight ratio, fl…
View article: High-resolution noncontact AFM and Kelvin probe force microscopy investigations of self-assembled photovoltaic donor–acceptor dyads
High-resolution noncontact AFM and Kelvin probe force microscopy investigations of self-assembled photovoltaic donor–acceptor dyads Open
Self-assembled donor–acceptor dyads are used as model nanostructured heterojunctions for local investigations by noncontact atomic force microscopy (nc-AFM) and Kelvin probe force microscopy (KPFM). With the aim to probe the photo-induced …
View article: CCDC 1456918: Experimental Crystal Structure Determination
CCDC 1456918: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Equal variations of the Fermi level and work function in graphene at the nanoscale
Equal variations of the Fermi level and work function in graphene at the nanoscale Open
International audience
View article: CCDC 1456916: Experimental Crystal Structure Determination
CCDC 1456916: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 1456917: Experimental Crystal Structure Determination
CCDC 1456917: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …