Publication
Ex-situ AlN seed layer for (0001)-textured Al0.84Sc0.16N thin films grown on SiO2 substrates
Publications associées (33)
In Situ and Time-Resolved Transmission Electron Microscopy of Nanoscale Processes
Observing the fast dynamics of nanoscale systems is crucial in order to understand and ultimately control their behavior. Characterizing these dynamic processes requires techniques with atomic spatial resolution and a temporal resolution that matches the t ...
EPFL2023Wafer-scale MoS2 with water-vapor assisted showerhead MOCVD
Aleksandra Radenovic, Andras Kis, Mukesh Kumar Tripathi, Mukeshchand Thakur, Michal Daniel Macha, Yanfei Zhao, Hyungoo Ji
Among numerous thin film synthesis methods, metalorganic chemical vapor deposition performed in a showerhead reactor is the most promising one for broad use in scalable and commercially adaptable two-dimensional material synthesis processes. Adapting the m ...
ROYAL SOC CHEMISTRY2022Nanoscale Study of the Hole-Selective Passivating Contacts with High Thermal Budget Using C-AFM Tomography
Christophe Ballif, Franz-Josef Haug, Quentin Thomas Jeangros, Gizem Nogay, Philipp Friedrich Hermann Löper, Martin Ledinsky
We investigate hole-selective passivating contacts that consist of an interfacial layer of silicon oxide (SiOx) and a layer of boron-doped SiCx(p). The fabrication process of these contacts involves an annealing step at temperatures above 750 degrees C whi ...
AMER CHEMICAL SOC2021Structure evolution, bandgap, and dielectric function in La-doped hafnium oxide thin layer subjected to swift Xe ion irradiation
Philippe Buffat, Elena Suvorova Buffat
High-resolution transmission electron microscopy, electron diffraction, and electron energy-loss spectroscopy provide information on the structural evolution, dielectric function, and bandgap values of nanocrystalline 10nm thick lanthanum doped hafnia (La: ...
AMER INST PHYSICS2020Determination of the internal piezoelectric potentials and indium concentration in InGaN based quantum wells grown on relaxed InGaN pseudo-substrates by off-axis electron holography
Micro light emitting diodes have been grown by metal organic vapor phase epitaxy on standard GaN and partly relaxed InGaNOS substrates with the purpose of incorporating higher concentrations of indium for identical growth conditions. Green emission has bee ...
2020Nanosecond pulsed laser-processing of CVD diamond
Patrik Willi Hoffmann, Marco Cantoni, Sébastien Equis
This work considers the resulting material structural effects of laser-processing chemical vapor deposited (CVD) diamond. The utilized 532 nm wavelength laser had a pulse duration of 40 ns together with a spot diameter of ca. 40 mu m. The effect of cutting ...
ELSEVIER SCI LTD2020Investigation of polycrystalline ZnO film growth by quantitative TEM orientation mapping
Polycrystalline chemical vapour deposited ZnO films are commonly used as transparent electrodes for photovoltaic devices. Over the past years much effort has been put into improving their properties. Even though these films are now well optimised for speci ...
EPFL2017The growth and optical properties of III-V nanostructures grown by Molecular Beam Epitaxy
This thesis is dedicated to the growth and characterization of the optoelectronic properties of III-V semiconductor nanostructures namely nanowires and nanoscale membranes. III-V semiconductors possess promising intrinsic properties like direct band gap, h ...
EPFL2017Characterization at the Atomistic Level of Defective Structures in Complex Materials
Defects are key to enhance or deploy particular materials properties. In this thesis I present analyses of the impact of defects on the electronic structure of materials using combined experimental and theoretical Electron energy loss spectroscopy (EELS) i ...
EPFL2017Focus: The interface between data collection and data processing in cryo-EM
We present a new software package called Focus that interfaces cryo-transmission electron microscopy (cryo-EM) data collection with computer image processing. Focus creates a user-friendly environment to import and manage data recorded by direct electron d ...
Elsevier BV2017