A5036782637- Electronic and Structural Properties of Oxides
- Ion-surface interactions and analysis
- Semiconductor materials and devices
- Magnetic and transport properties of perovskites and related materials
- Metal and Thin Film Mechanics
- Diamond and Carbon-based Materials Research
- Nuclear Physics and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Integrated Circuits and Semiconductor Failure Analysis
- Reproductive Physiology in Livestock
- Electron and X-Ray Spectroscopy Techniques
- Chalcogenide Semiconductor Thin Films
- Advanced Condensed Matter Physics
- Quantum Dots Synthesis And Properties
- Advancements in Solid Oxide Fuel Cells
- ZnO doping and properties
- High-Temperature Coating Behaviors
- Semiconductor materials and interfaces
- Inorganic Chemistry and Materials
- Radiation Detection and Scintillator Technologies
- Advanced Thermoelectric Materials and Devices
- Advancements in Battery Materials
- Advanced Photocatalysis Techniques
- Ferroelectric and Piezoelectric Materials
- Nuclear Materials and Properties
ETH Zurich
2016-2025
Ion Beam Applications (France)
2020-2022
Paul Scherrer Institute
2005-2021
University of Zurich
1988-2021
University of Geneva
2021
Swiss Light Source
2021
Board of the Swiss Federal Institutes of Technology
1995-2020
École Polytechnique Fédérale de Lausanne
2003-2019
University of Science and Technology Beijing
2018
Swiss Federal Laboratories for Materials Science and Technology
2015
The introduction of a KF postdeposition treatment (KF PDT) Cu(In,Ga)Se2 (CIGS) thin films has led to the achievement several consecutive new world record efficiencies up 21.7% for CIGS solar cell technology. beneficial effect PDT on photovoltaic parameters was observed by groups in spite differing growth methods layer. For evaporated at lower temperature alkali-free, flexible plastic substrates, add Na already successfully applied. However, with additional under comparable conditions,...
In this work, we have quantitatively elucidated the source of hydrogen content in atomic layer deposition Al2O3 at different temperatures (80–220 °C), by replacing H2O precursor with heavy water (D2O) to use as a tracer and discern between H coming from unreacted metal ligands that −OD (hydroxyl) groups (heavy) water. The main impurities arises hydroxyl (−OD), reaching ∼18 atom % deuterium temperature 80 °C. Reconsidering carefully our own literature experimental data, concluded generally...
Abstract Despite the apparent simplicity of pulsed laser deposition, consistent deposition thin films with desired thickness, composition, crystallinity, and quality still remains challenging. This article explores influence process parameters respect to film thickness two key aspects for which have a very strong effect on properties, possible applications, characterization. Using five perovskite materials, systematic analysis different parameters, e.g., target material, pressure, fluence,...
Abstract The high ionic conductivity and wide electrochemical stability of the lithium garnet Li 7 La 3 Zr 2 O 12 (LLZO) make it a viable solid electrolyte for all‐solid‐state batteries with superior capacity power densities. Contrary to common ceramic processing routes bulk pellets, thin film electrolytes could enable large‐area fabrication, increase energy densities by reducing bulkiness, weight critically, area‐specific resistance electrolyte. Fabrication LLZO films has nonetheless been...
Abstract Structural colors have drawn wide attention for their potential as a future printing technology various applications, ranging from biomimetic tissues to adaptive camouflage materials. However, an efficient approach realize robust with scalable fabrication technique is still lacking, hampering the realization of practical applications this platform. Here, we develop new based on large-scale network metamaterials that combine dealloyed subwavelength structures at nanoscale lossless,...
The present work shows results on elemental distribution analyses in Cu(In,Ga)Se2 thin films for solar cells performed by use of wavelength-dispersive and energy-dispersive X-ray spectrometry (EDX) a scanning electron microscope, EDX transmission photoelectron, angle-dependent soft emission, secondary ion-mass (SIMS), time-of-flight SIMS, sputtered neutral mass, glow-discharge optical emission Auger electron, Rutherford backscattering spectrometry, microscopy, Raman depth profiling, mapping,...
Electronic structure engineering is achieved in colloidal quantum dot solids by surface-based stoichiometry adjustment.
Single phase and strained LuMnO3 thin films are discovered to display co-existing ferromagnetic antiferromagnetic orders. A large moment ferromagnetism (approx. 1 muB), which is absent in bulk samples, shown a magnetic distribution that peaked at the highly-strained substrate-film interface. We further show strain-induced order coupled via an exchange field, therefore demonstrating rare-earth managanite as promising candidate systems for new multifunctional devices.
Polycrystalline tungsten-substituted CaMn1−xWxO3−δ (0.00 ≤ x 0.05) powders were synthesized from a polymeric precursor, pressed and sintered to high density. The impact of tungsten substitution on the crystal structure, thermal stability, phase transition, electronic transport properties is assessed. Tungsten acts as an electron donator strongly affects high-temperature oxygen stoichiometry. Oxygen vacancies form in figure-of-merit (ZT)-region starting about T = 1000 K dominate carrier...
The single-step reaction of benzene and boron tribromide in a closed reactor at elevated temperature (800 °C) results the synthesis bulk boron-doped graphitic carbon. Materials continuously tunable composition BCx′ are accessible (x ≥ 3), exhibiting structure solid-solution within turbostratic graphite (G′). Upon extended heat treatment or higher temperatures, is leached undergoes phase separation into carbide graphite. Higher content correlated with an increased maximum capacity for alkali...
Abstract The discovery of hydrogen-induced electronic phase transitions in strongly correlated materials such as rare-earth nickelates has opened up a new paradigm regulating materials’ properties for both fundamental study and technological applications. However, the microscopic understanding how protons electrons behave transition is lacking, mainly due to difficulty characterization hydrogen doping level. Here, we demonstrate quantification trajectory strain-regulated SmNiO 3 by using...
We report on a first measurement of the polarized-target asymmetry pion-proton bremsstrahlung cross section (${\ensuremath{\pi}}^{+}p\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}p\ensuremath{\gamma}$). As in previous measurements pion energy (298 MeV) and detector geometry for this experiment was chosen to optimize sensitivity radiation from magnetic dipole moment ${\ensuremath{\Delta}}^{++}(1232)$ resonance ${\ensuremath{\mu}}_{\ensuremath{\Delta}}$. Comparison recent isobar model...
Surface x-ray diffraction was used to determine the atomic structures of ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{MnO}}_{3}$ thin films, grown monolayer by on ${\mathrm{SrTiO}}_{3}$ pulsed laser deposition. Structures for one-, two-, three-, four-, six-, and nine-monolayer-thick films were solved using Coherent Bragg rod analysis phase-retrieval method subsequent structural refinement. Four important results found. First, out-of-plane lattice constant is elongated across...
At an interface between a topological insulator (TI) and conventional superconductor (SC), superconductivity has been predicted to change dramatically exhibit novel correlations. In particular, the induced by s-wave SC in TI can develop order parameter with p-wave component. Here we present experimental evidence for unexpected proximity-induced superconducting state thin layer of prototypical TI, Bi_{2}Se_{3} proximity coupled Nb. From depth-resolved magnetic field measurements below...
Abstract Among cathode materials, LiNi 0.8 Mn 0.1 Co O 2 (NMC811) is the most discussed for high performance Li‐ion batteries, thanks to its capacity of ≈200 mAh g ‐1 and low content. Here, it demonstrated that NMC811 can reversibly accommodate more than one per formula unit when coupled with a solid‐state electrolyte, thus significantly increasing capacity. Sputtered Li‐rich cathodes are tested lithium–phosphorus–oxynitride as electrolyte in thin‐film architecture, which simplified 2D model...
We developed an operant paradigm for measuring effects of reproductive steroids on maternal motivation in common marmosets (Callithrix jacchus). Conditioned response regulated females' exposure to reinforcement. Nulliparous females (n = 15) with experience infants social groups were subjects. The was validated by examining (a) reinforcing stimuli affective behavior a nonoperant paradigm, (b) responsiveness performance changes and reinforcement schedule, (c) responding due omission...