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Josef Andreas Schuler

Cette personne a quitté l’EPFL

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Publications associées (58)

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Three-dimensional microstructural mapping of poisoning phases in the Neodymium Nickelate solid oxide fuel cell cathode

Jan Van Herle, Josef Andreas Schuler, Jun Wang, Henning Lübbe

Nd-Nickelate (NNO), Nd1.95NiO4+delta, an alternative solid oxide fuel cell cathode material, has been imaged and mapped in 3D using synchrotron-based x-ray nanotomography. The NNO cathode material, which suffered from silicon contamination during fabricati ...

Elsevier Science Bv2013

Laminated glazing with coloured reflection and high solar transmittance suitable for solar energy systems

Virginie Hody-Le Caër, Andreas Schueler, Josef Andreas Schuler

Laminated and etched glazing unit for architectural integration of solar energy systems comprising a substrate delimited by two main faces and a multi-layered interference filter also delimited by two main faces, one main face of said substrate being adapt ...

2017

Quantum dots in photovoltaic solar energy conversion

Josef Andreas Schuler

Quantum dots have attracted recently considerable attention of the research communities in solid state and biophysics. Due to their fascinating optical and electronical properties, nanometer-scaled structures play an important role in solar energy conversi ...

2006

Dynamics of excited interlayer states in hexagonal boron nitride monolayers

Josef Andreas Schuler, Silvan Dino Marcos Roth

Hexagonal boron nitride () is the isoelectronic but insulating counterpart of graphene. Like graphene it can easily be grown as high-quality nanotubes or as single layers on metal surfaces. Both materials can be exfoliated or transferred after single-layer ...

2020

Infrared Optical Properties of Doped and Pure Thermochromic Coatings for Solar Thermal Absorbers

Josef Andreas Schuler, Anna Krammer

A new generation of solar collectors is based on thermochromic thin film technology, where the remarkable optical changes of vanadium dioxide, through its reversible semiconductor-to-metal phase transition, are exploited. This study reports on the infrared ...

ISES2018

Glass-Forming Exogenous Silicon Contamination in Solid Oxide Fuel Cell Cathodes

Jan Van Herle, Aïcha Hessler-Wyser, Josef Andreas Schuler, Zacharie Wuillemin

Spatially resolved analyses, by energy-dispersive X-ray spectroscopy (EDS) scanning electron microscopy (SEM), allowed the quantification of exogenous Si contamination in a solid oxide fuel cell (SOFC) cathode after operation. The Si quantification, taking ...

Electrochemical Society2011

Ni3N as an Active Hydrogen Oxidation Reaction Catalyst in Alkaline Medium

Xile Hu, Andreas Schueler, Josef Andreas Schuler, Anna Krammer, Weiyan Ni

Hydroxide-exchange membrane fuel cells can potentially utilize platinum-group-metal (PGM)-free electrocatalysts, offering cost and scalability advantages over more developed proton-exchange membrane fuel cells. However, there is a lack of non-precious elec ...

Wiley-VCH Verlag GmbH2019

Fabrication of CMOS-compatible abrupt electronic switches based on vanadium dioxide

Mihai Adrian Ionescu, Josef Andreas Schuler, Wolfgang Amadeus Vitale, Clara-Fausta Moldovan, Antonio Paone

Vanadium dioxide thin films were deposited on amorphous SiO2-coated Si substrates, by reactive magnetron sputtering at 490 °C of a pure vanadium target. The deposition parameters were optimized in order to maximize the resistivity modulation due to the met ...

Elsevier2015

Interference filter with angular independent orange colour of reflection and high solar transmittance, suitable for roof-integration of solar energy systems

Andreas Schueler, Josef Andreas Schuler, Martin Joly

olar glazing unit, suitable for photovoltaic modules and solar thermal collectors, comprising a substrate delimited by two main faces and a multi-layered interference filter also delimited by two main faces, one main face of said substrate being adapted to ...

2015

Hybrid phase-change — Tunnel FET (PC-TFET) switch with subthreshold swing < 10mV/decade and sub-0.1 body factor: Digital and analog benchmarking

Mihai Adrian Ionescu, Josef Andreas Schuler, Wolfgang Amadeus Vitale, Cem Alper, Anna Krammer, Arnab Biswas, Emanuele Andrea Casu, Teodor Rosca, Nicolò Oliva

In this paper we report the first hybrid Phase-Change - Tunnel FET (PC-TFET) device configurations for achieving a deep sub-thermionic steep subthreshold swing at room temperature and subthreshold power savings. The proposed hybrid device feedbacks the ste ...

IEEE2016

Color neutral nanocomposite nickel-tantalum oxide for electrochromic windows

Andreas Schueler, Josef Andreas Schuler, Olivia Valérie Charlotte Bouvard

Electrochromic windows can darken on demand to limit the solar gains entering a building to reduce the risk of overheating, while preserving the view towards the exterior. Yet, the switching speed and contrast as well as the durability of commercial produc ...

IOP2019

3D Smith charts scattering parameters frequency-dependent orientation analysis and complex-scalar multi-parameter characterization applied to Peano reconfigurable vanadium dioxide inductors

Mihai Adrian Ionescu, Andreas Schueler, Josef Andreas Schuler, Anna Krammer, Montserrat Fernandez-Bolanos Badia, Emanuele Andrea Casu, Matteo Cavalieri, Andrei Müller, Junrui Zhang

Recently, the field of Metal-Insulator-Transition (MIT) materials has emerged as an unconventional solution for novel energy efficient electronic functions, such as steep slope subthermionic switches, neuromorphic hardware, reconfigurable radiofrequency fu ...

Nature Research2019

Combined Cr and S poisoning in solid oxide fuel cell cathodes

Jan Van Herle, Aïcha Hessler-Wyser, Quentin Thomas Jeangros, Josef Andreas Schuler, Zacharie Wuillemin, Caroline Calderone

This work aims to compare the effect of combined chromium and sulfur contaminating conditions to the Cr contamination alone on the Cr poisoning mechanisms in (La,Sr)MnO3-(Zr,Y)O-2 solid oxide fuel cell (SOFC) cathodes. Whereas Cr2O3 and (Cr,Mn)(3)O-4 are f ...

Elsevier2012

VO2:Ge based thermochromic solar absorber coatings

Josef Andreas Schuler, Anna Krammer

Flat plate solar collectors face the problem of overheating and the ensuing high thermal stresses and general collector damage lead to high maintenance costs. To address this challenge, absorber coatings with a passive optical switch at critically high ope ...

ELSEVIER2022

Tunable Capacitors and Microwave Filters Based on Vanadium Dioxide Metal-Insulator Transition

Mihai Adrian Ionescu, Josef Andreas Schuler, Montserrat Fernandez-Bolanos Badia, Wolfgang Amadeus Vitale, Clara-Fausta Moldovan, Antonio Paone

We report the fabrication, modeling and characterization of novel microwave tunable capacitors based on the metal-insulator transition (MIT) of Vanadium Dioxide (VO2). We present the advantages of VO2-based capacitors over alternative technologies for micr ...

2015

Location Based Study of the Annual Thermal Loads with Microstructured Windows in European Climates

Josef Andreas Schuler, André Gabriel Kostro, Sara Vanzo

Glazed envelopes can cause significant thermal energy gains or losses. The installation of a novel design of Complex Fenestration Systems (CFS), such as embedded mirrors, could significantly contribute to reduce the energy consumption. In order to determin ...

2015

TEM investigation on zirconate formation and chromium poisoning in LSM/YSZ cathode

Jan Van Herle, Aïcha Hessler-Wyser, Antonin Faes, Josef Andreas Schuler, Zacharie Wuillemin

Cell durability is a crucial technological issue for SOFC commercialization, and considerable progress has been made in recent years. A number of degradation pathways have been established, amongst which microstructural changes, poisoning effects and forma ...

Springer Verlag2011

Sol-gel deposition of nanostructured low refractive index materials on solar collector glazing

Jean-Louis Scartezzini, Josef Andreas Schuler, Christian Roecker, Estelle De Chambrier

Nanoporous SiO2 and nanocomposite MgF2:SiO2 coatings have been deposited by sol gel dip-coating in a particle-free atmosphere. The refractive index of the prepared nanostructured thin films is determined from spectrophotometric data. In both cases, signifi ...

2006

Nd-nickelate solid oxide fuel cell cathode sensitivity to Cr and Si contamination

Jan Van Herle, Aïcha Hessler-Wyser, Josef Andreas Schuler, Henning Lübbe

The stability of Nd-nickelate, considered as an alternative solid oxide fuel cell (SOFC) cathode material, was evaluated in this work on its tolerance towards contaminants. ...

Elsevier2012

In-situ and post annealing effect on the microstructure and the optical properties of black Cu-Co-Mn oxide spinel coating for Parabolic Trough Collector (PTC) applications

Andreas Schueler, Josef Andreas Schuler, Anna Krammer, Samaneh Daviran

The present paper deals with the deposition of Cu-Co-Mn oxides thin film by magnetron sputtering to produce a black selective coating for solar Parabolic Trough Collector (PTC) systems. The effect of temperature was studied between the nominal temperature ...

IOP Science2019