Aïcha Hessler-Wyser

Nationality: CH

EPFL STI IMT PV-LAB
MC A2 305 (Bâtiment MC)
Rue de la Maladière 71b, CP 526
2002 Neuchâtel 2

Expertise

TEM, SEM Photovoltaïcs Material Science Materials for Energy Nanophysics Metallurgy (metals, superalloys, SMA, powders...)

Education

Doctorat

| Physique

1999 – 1999 EPFL
Directed by Rolf Gotthardt

Ing�nieure EPF

| Physique

1994 – 1994 EPFL
Directed by J.-D. Ganière

Selected publications

Oxidation mechanism of nickel particles studied in an environmental transmission electron microscope

Jeangros, Q Hansen, T.W. Wagner, J.B, Dunin-Borkowski, R.E. H�bert, C. Van herle, J Hessler-Wyser, A
Published in Acta Materialia, Vol 67 (2014), 362-372 in

Time-resolved X-ray microtomography observation of inter metallic formation between solid Fe and liquid Al

Pasche, G SCheel, M Sch�ublin, R H�bert, C. Rappaz, M Hessler-Wyser, A
Published in Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science 44(9):(2013) 4119-4123 in

Cr-poisoning in (La,Sr)(Co, Fe)O3 cathodes after 10'000h SOFC stack testing

Schuler, A Wuillemin, Z Hessler-Wyser, A Comminges, C Steriner, N. Y Van herle, J
Published in Journal of Power Sources, Vol 211 (2012) 177-183 in

Mechanical and microstructural integrity of nickel-titanium and stainless steel laser joined wires

Vannod, J Bornert, M Bidaux, J-E Bataillard, L Karimi, A Drezet, J-M Rappaz, M Hessler-Wyser, A
Published in Acta Materialia, Vol 59, 17 (2011) 6538-6546 in

Microstructure at submicron scale of the white layer produced by EDM technique

Cusanelli, G., R. Fl�kiger, A. Hessler-Wyser, F. Bobard, R. Demellayer, and R. Perez
Published in Journal of Materials Processing Technology, 2004. 149(1-3): p. 289-295 in

Use of quantitative EELS and cathodoluminescence for study of carrier confinement and diffusion in self organized vertical quantum wells

Leifer, K., S. Mautino, H. Weman, A. Rudra, E. Pelucchi, F. Bobard, A. Wyser, and E. Kapon
Published in Design and Nature, 2004. 6: p. 131 in

Silver thick-film contacts on highly doped n-type silicon emitters: Structural and electronic properties of the interface

Ballif, C., D.M. Huljic, G. Willeke, and A. Hessler-Wyser
Published in Applied Physics Letters, 2003. 82(12): p. 1878-1880 in

TEM studies of in situ martensitic transformation in NiTi thin films

Crevoiserat, S., T. Lehnert, A. Hessler-Wyser, and R. Gotthardt
Published in Journal De Physique. IV: JP, 2001. 11(8) in

Multilayered phase formation after high-fluence implantation of nickel into aluminium

Hessler-Wyser, A., A. Cuenat, M. Döbeli, C. Abromeit, and R. Gotthardt
Published in Philosophical Magazine Letters, 2001. 81(12): p. 893-899 in

Structure analysis by diffraction of amorphous zones created by Ni ion implantation into pure Al. Ultramicroscopy

Cuenat, A., R. Schäublin, A. Hessler-Wyser, and R. Gotthardt
Published in Ultramicroscopy, 2000. 83(3-4): p. 179-191 in

Amorphization in Al induced by high-energy Ni ion implantation

Wyser, A., R. Gotthardt, and R. Schäublin
Published in Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 1996. 107(1-4): p. 273-275 in

2026

Elimination of Nanoscale Phase Impurities for Intrinsically Stable Formamidinium-Rich Perovskite Films and Devices

M. R. S. B. Othman / A. Hessler-WyserC. M. Wolff (Dir.)

Lausanne, EPFL, 2026. DOI : 10.5075/epfl-thesis-11658.

2025

Enhancing the Performance and Photostability of Perovskite Solar Cells with a Multifunctional Light‐Management Composite

S. M. MousaviM. OthmanF. ZouN. LamminenG. C. Tewari  et al.

Small Science. 2025. DOI : 10.1002/smsc.202500330.

Perovskite-perovskite-silicon triple junction solar cells with improved carrier and photon management

K. ArtukD. TürkayA. G. KubaS. RiemelmoserJ. Steele  et al.

2025

Making from Breaking: Degradation Inversion Enables Vapor-Phase Synthesis of Halide Perovskites in Ambient Conditions

A. G. KubaF. SahliM. OthmanK. ArtukQ. Jeangros  et al.

ACS Energy Letters. 2025. DOI : 10.1021/acsenergylett.4c03395.

Suppression of Stacking Faults for Stable Formamidinium-Rich Perovskite Absorbers

M. OthmanL. AgostaQ. JeangrosA. JaffresS. Jenatsch  et al.

ADVANCED MATERIALS. 2025. DOI : 10.1002/adma.202502142.

60 cm2 perovskite-silicon tandem solar cells with an efficiency of 28.9% by homogenous passivation

K. ArtukA. OranskaiaD. TürkayF. SaenzM. D. Mensi  et al.

2025

Beyond Flat: Undulated Perovskite Solar Cells on Microscale Si Pyramids by Solution Processing

D. TurkayK. ArtukM. OthmanF. SahliL. Champault  et al.

ACS ENERGY LETTERS. 2025. DOI : 10.1021/acsenergylett.5c00221.

Aryl-Acetylene Layered Hybrid Perovskites in Photovoltaics

G. AlsabehV. SlamaM. RenM. AlmalkiL. Pfeifer  et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION. 2025. DOI : 10.1002/anie.202417432.

2024

Improving the photo-stability of triple cation perovskite solar cells using chromophore-infused optically transparent Pectin/polymethyl methacrylate composite

S. M. MousaviJ. VapaavuoriF. ZouN. LamminenH. Baniasadi  et al.

2024. MATSUS Spring 2025 Conference, Sevilla, Spain, 2025-03-03 - 2025-03-07. DOI : 10.29363/nanoge.matsusspring.2025.335.

Linking Nanoscopic Insights to Millimetric-Devices in Formamidinium-Rich Perovskite Photovoltaics

M. OthmanQ. JeangrosM. U. RothmannY. JiangC. Ballif  et al.

Advanced Materials. 2024. DOI : 10.1002/adma.202409742.

Bifacial perovskite/silicon heterojunction tandem solar cells based on FAPbI<inf>3</inf>-based perovskite via hybrid evaporation-spin coating

M. R. GolobostanfardM. OthmanD. TurkayK. ArtukX. Y. Chin  et al.

Nano Energy. 2024. DOI : 10.1016/j.nanoen.2024.110269.

Assessing the Influence of Illumination on Ion Conductivity in Perovskite Solar Cells

A. SchillerS. JenatschB. BlülleM. A. Torre CachafeiroF. Ebadi  et al.

The journal of physical chemistry letters. 2024. DOI : 10.1021/acs.jpclett.4c02403.

Development and characterization of N2O-plasma oxide layers for high-temperature p-type passivating contacts in silicon solar cells

S. LibraroL. BannenbergT. FamprikisD. ReyesJ. Hurni  et al.

ACS Applied Materials & Interfaces. 2024. DOI : 10.1021/acsami.4c10612.

Blade-Coating of High Crystallinity Cesium-Formamidinium Perovskite Formulations

A. JaffrèsM. OthmanF. SaenzA. Hessler-WyserQ. Jeangros  et al.

ACS applied materials & interfaces. 2024. DOI : 10.1021/acsami.4c04706.

Colouring solutions for building integrated photovoltaic modules: A review

A. Borja BlockJ. Escarre PalouM. CourtantA. VirtuaniG. Cattaneo  et al.

Energy and Buildings. 2024. DOI : 10.1016/j.enbuild.2024.114253.

Alleviating nanostructural phase impurities enhances the optoelectronic properties, device performance and stability of cesium-formamidinium metal-halide perovskites

M. OthmanQ. JeangrosD. A. JacobsM. H. FutscherS. Zeiske  et al.

Energy & Environmental Science. 2024. DOI : 10.1039/d4ee00901k.

Stress tolerance of lightweight glass-free PV modules for vehicle integration

U. B. DesaiK. NicoletS. PrabhudesaiG. CattaneoJ. Robin  et al.

Epj Photovoltaics. 2024. DOI : 10.1051/epjpv/2024003.

Nanostructure and Optical Property Tailoring of Zinc Tin Nitride Thin Films through Phenomenological Decoupling: A Pathway to Enhanced Control

C. HainK. WieczerzakD. CasariA. SharmaA. Xomalis  et al.

Acs Applied Nano Materials. 2024. DOI : 10.1021/acsanm.3c06178.

A Universal Perovskite/C60 Interface Modification via Atomic Layer Deposited Aluminum Oxide for Perovskite Solar Cells and Perovskite-Silicon Tandems

K. ArtukD. TurkayM. D. MensiJ. A. SteeleD. A. Jacobs  et al.

Advanced Materials. 2024. DOI : 10.1002/adma.202311745.

Interactions between aluminium and fired passivating contacts during fire-through metallization (vol 249, 112051, 2023)

S. LibraroM. LehmannJ. J. D. LeonC. AllebeA. Descoeudres  et al.

Solar Energy Materials And Solar Cells. 2024. DOI : 10.1016/j.solmat.2024.112722.

Microstructural and electrical characterization of high temperature passivating contacts for silicon solar cells

S. Libraro / A. Hessler-WyserF.-J. Haug (Dir.)

Lausanne, EPFL, 2024. DOI : 10.5075/epfl-thesis-10516.

2023

Operando analysis of a solid oxide fuel cell by environmental transmission electron microscopy

Q. JeangrosM. BugnetT. EpicierC. FrantzS. Diethelm  et al.

Nature Communications. 2023. DOI : 10.1038/s41467-023-43683-4.

Understanding and mitigating resistive losses in fired passivating contacts: role of the interfaces and optimization of the thermal budget

S. LibraroA. M. I. MorissetJ. HurniE. GencL. Antognini  et al.

Solar Energy Materials And Solar Cells. 2023. DOI : 10.1016/j.solmat.2023.112591.

Passivating contact-based tunnel junction Si solar cells using machine learning for tandem cell applications

H. ParkA. MorissetM. KimH.-S. LeeA. Hessler-Wyser  et al.

Energy And Ai. 2023. DOI : 10.1016/j.egyai.2023.100299.

Plasma-Assisted Hybrid Vapour Deposition Technology for Thin Film Fabrication

C. Hain / A. Hessler-WyserT. Nelis (Dir.)

Lausanne, EPFL, 2023. DOI : 10.5075/epfl-thesis-10204.

Interactions between aluminium and fired passivating contacts during fire-through metallization

S. LibraroM. LehmannJ. J. D. LeonC. AllebeA. Descoeudres  et al.

Solar Energy Materials And Solar Cells. 2023. DOI : 10.1016/j.solmat.2022.112051.

III-V Nitride Semiconductors Deposited At Low Temperature For Photovoltaic Applications

J. E. Thomet / A. Hessler-WyserN. Würsch (Dir.)

Lausanne, EPFL, 2023. DOI : 10.5075/epfl-thesis-10249.

2022

Microwave plasma-assisted reactive HiPIMS of InN films: Plasma environment and material characterisation

C. HainP. SchweizerP. SturmA. BorziJ. E. Thomet  et al.

Surface & Coatings Technology. 2022. DOI : 10.1016/j.surfcoat.2022.129188.

Bandgap engineering of indium gallium nitride layers grown by plasma-enhanced chemical vapor deposition

J. E. ThometA. K. SinghM. N. RouecheN. ToggwylerF.-J. Haug  et al.

Journal Of Vacuum Science & Technology A. 2022. DOI : 10.1116/6.0002039.

From pulsed-DCMS and HiPIMS to microwave plasma-assisted sputtering: Their influence on the properties of diamond-like carbon films

C. HainD. BrownA. WelshK. WieczerzakR. Weiss  et al.

Surface & Coatings Technology. 2022. DOI : 10.1016/j.surfcoat.2021.127928.

2021

Quantification of hydrogen in nanostructured hydrogenated passivating contacts for silicon photovoltaics combining SIMS-APT-TEM: A multiscale correlative approach

S. PalJ. BarrireroM. LehmannQ. JeangrosN. Valle  et al.

Applied Surface Science. 2021. DOI : 10.1016/j.apsusc.2021.149650.

Passivating Polysilicon Recombination Junctions for Crystalline Silicon Solar Cells

F.-J. HaugA. MorissetP. WyssM. LehmannA. Hessler-Wyser  et al.

physica status solidi (RRL) – Rapid Research Letters. 2021. DOI : 10.1002/pssr.202100272.

2019

Field test and electrode optimization of electrodynamic cleaning systems for solar panels

A. FaesD. PetriJ. ChampliaudJ. GeissbuehlerN. Badel  et al.

Progress In Photovoltaics. 2019. DOI : 10.1002/pip.3176.

A method for quantitative nanoscale imaging of dopant distributions using secondary ion mass spectrometry: an application example in silicon photovoltaics

S. EswaraA. PshenovaE. LentzenG. NogayM. Lehmann  et al.

Mrs Communications. 2019. DOI : 10.1557/mrc.2019.89.

Zr-doped indium oxide electrodes: Annealing and thickness effects on microstructure and carrier transport

E. RucavadoF. LanducciM. DoebeliQ. JeangrosM. Boccard  et al.

Physical Review Materials. 2019. DOI : 10.1103/PhysRevMaterials.3.084608.

A multi-technique approach to study the microstructural properties of tin-based transparent conductive oxides

F. Landucci / A. Hessler-WyserC. Hébert (Dir.)

Lausanne, EPFL, 2019. DOI : 10.5075/epfl-thesis-9536.

Analysis of hydrogen distribution and migration in fired passivating contacts (FPC)

M. LehmannN. ValleJ. HorzelA. PshenovaP. Wyss  et al.

Solar Energy Materials and Solar Cells. 2019. DOI : 10.1016/j.solmat.2019.110018.

2017

Metallization of Si heterojunction solar cells by nanosecond laser ablation and Ni-Cu plating

A. DabirianA. LachowiczJ. -W. SchuttaufB. Paviet-SalomonM. Morales-Masis  et al.

Solar Energy Materials And Solar Cells. 2017. DOI : 10.1016/j.solmat.2016.09.021.

Enhancing the optoelectronic properties of amorphous zinc tin oxide by subgap defect passivation: A theoretical and experimental demonstration

E. RucavadoQ. JeangrosD. UrbanJ. HolovskyZ. Remes  et al.

Physical Review B. 2017. DOI : 10.1103/PhysRevB.95.245204.

Direct Imaging of Dopant Distribution in Polycrystalline ZnO Films

F. LorenzoA. B. AebersoldM. Morales-MasisM. LedinskyS. Escrig  et al.

ACS Applied Materials & Interfaces. 2017. DOI : 10.1021/acsami.6b14350.

High performance amorphous Zn-Sn-O: impact of composition, microstructure, and thermal treatments in the optoelectronic properties

M. Morales-MasisE. RucavadoQ. JeangrosF. LanducciA. Hessler-Wyser  et al.

2017. 8th Conference on Oxide-Based Materials and Devices VIII, San Francisco, CA, JAN 29-FEB 01, 2017. DOI : 10.1117/12.2252603.

Zinc blende-wurtzite polytypism in nanocrystalline ZnO films

A. B. AebersoldL. FanniA. Hessler-WyserS. NicolayC. Ballif  et al.

Acta Materialia. 2017. DOI : 10.1016/j.actamat.2017.03.021.

2016

Strategies for Doped Nanocrystalline Silicon Integration in Silicon Heterojunction Solar Cells

J. P. SeifA. DescoeudresG. NogayS. HanniS. M. De Nicolas  et al.

Ieee Journal Of Photovoltaics. 2016. DOI : 10.1109/Jphotov.2016.2571619.

Tuning the Optoelectronic Properties of ZnO:Al by Addition of Silica for Light Trapping in High-Efficiency Crystalline Si Solar Cells

A. DabirianS. M. De NicolasB. NiesenA. Hessler-WyserS. De Wolf  et al.

Advanced Materials Interfaces. 2016. DOI : 10.1002/admi.201500462.

In Situ TEM Analysis of Organic-Inorganic Metal-Halide Perovskite Solar Cells under Electrical Bias

Q. JeangrosM. DuchampJ. WernerM. KruthR. E. Dunin-Borkowski  et al.

Nano Letters. 2016. DOI : 10.1021/acs.nanolett.6b03158.

An Indium-Free Anode for Large-Area Flexible OLEDs: Defect-Free Transparent Conductive Zinc Tin Oxide

M. Morales-MasisF. DauzouQ. JeangrosA. DabirianH. Lifka  et al.

Advanced Functional Materials. 2016. DOI : 10.1002/adfm.201503753.

Lithium Fluoride Based Electron Contacts for High Efficiency n-Type Crystalline Silicon Solar Cells

J. BullockP. ZhengQ. JeangrosM. TosunM. Hettick  et al.

Advanced Energy Materials. 2016. DOI : 10.1002/aenm.201600241.

2015

Increasing Polycrystalline Zinc Oxide Grain Size by Control of Film Preferential Orientation

L. FanniA. B. AebersoldM. Morales-MasisD. T. L. AlexanderA. Hessler-Wyser  et al.

Crystal Growth & Design. 2015. DOI : 10.1021/acs.cgd.5b01299.

Solid-liquid interdiffusion (SLID) bonding in the Au-In system: experimental study and 1D modelling

L. DeillonA. Hessler-WyserT. HesslerM. Rappaz

Journal Of Micromechanics And Microengineering. 2015. DOI : 10.1088/0960-1317/25/12/125016.

22.5% efficient silicon heterojunction solar cell with molybdenum oxide hole collector

J. GeissbuehlerJ. WernerS. M. De NicolasL. BarraudA. Hessler-Wyser  et al.

Applied Physics Letters. 2015. DOI : 10.1063/1.4928747.

2014

Light-Management Strategies for Thin-Film Silicon Multijunction Solar Cells

B. NiesenJ.-W. A. SchüttaufE. A. J. MoulinS. HänniM. Boccard  et al.

2014. 6th World Conference on Photovoltaic Energy Conversation (WCPEC-6), Kyoto, Japan, November 23-27, 2014.

In situ TEM study of reduction and reoxidation of NiO/ceramic composites

Q. Jeangros / J. Van HerleA. Hessler-Wyser (Dir.)

Lausanne, EPFL, 2014. DOI : 10.5075/epfl-thesis-6376.

Hydrogen plasma treatment for improved conductivity in amorphous aluminum doped zinc tin oxide thin films

M. Morales-MasisL. DingF. DauzouQ. JeangrosA. Hessler-Wyser  et al.

APL Materials. 2014. DOI : 10.1063/1.4896051.

Self-Patterned Nanoparticle Layers for Vertical Interconnects: Application in Tandem Solar Cells

B. NiesenN. BlondiauxM. BoccardM. StuckelbergerR. Pugin  et al.

Nano Letters. 2014. DOI : 10.1021/nl501774u.

Amorphous silicon enhanced metal-insulator-semiconductor contacts for silicon solar cells

J. BullockA. CuevasD. YanB. DemaurexA. Hessler-Wyser  et al.

Journal Of Applied Physics. 2014. DOI : 10.1063/1.4900539.

Amorphous silicon passivated contacts for diffused junction silicon solar cells

J. BullockD. YanY. WanB. DemaurexA. Cuevas  et al.

Journal of Applied Physics. 2014. DOI : 10.1063/1.4872262.

2013

Three-dimensional chemical analysis of laser-welded NiTi–stainless steel wires using a dual-beam FIB

P. BurdetJ. VannodA. Hessler-WyserM. RappazM. Cantoni

Acta Materialia. 2013. DOI : 10.1016/j.actamat.2013.01.069.

Energy-Efficient Sol-Gel Process for Production of Nanocomposite Absorber Coatings for Tubular Solar Thermal Collectors

M. JolyY. AntonettiM. PythonM. GonzalezT. Gascou  et al.

2013. CISBAT 2013, Lausanne, Switzerland, September 4-6, 2013. p. 11 - 16.

Interaction between liquid aluminium and solid iron Al-rich intermetallics formation

G. Pasche / A. Hessler-WyserC. Hébert (Dir.)

Lausanne, EPFL, 2013. DOI : 10.5075/epfl-thesis-6044.

Time-Resolved X-Ray Microtomography Observation of Intermetallic Formation Between Solid Fe and Liquid Al

G. PascheM. ScheelR. SchaeublinC. HebertM. Rappaz  et al.

Metallurgical And Materials Transactions A-Physical Metallurgy And Materials Science. 2013. DOI : 10.1007/s11661-013-1788-6.

2012

A Review of RedOx Cycling of Solid Oxide Fuel Cells Anode

A. FaesA. Hessler-WyserA. ZrydJ. Van Herle

Membranes. 2012. DOI : 10.3390/membranes2030585.

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

J. A. SchulerH. LuebbeA. Hessler-WyserJ. Van Herle

Journal Of Power Sources. 2012. DOI : 10.1016/j.jpowsour.2012.03.112.

UV-nanoimprint lithography and large area roll-to-roll texturization with hyperbranched polymer nanocomposites for light-trapping applications

M. González LazoR. TeuscherY. LeterrierJ.-A. E. MånsonC. Calderone  et al.

Solar Energy Materials and Solar Cells. 2012. DOI : 10.1016/j.solmat.2012.04.034.

Silicon Filaments in Silicon Oxide for Next-Generation Photovoltaics

P. CuonyD. T. L. AlexanderI. Perez-WurflM. DespeisseG. Bugnon  et al.

Advanced Materials. 2012. DOI : 10.1002/adma.201104578.

Cr-poisoning in (La,Sr)(Co,Fe)O-3 cathodes after 10,000 h SOFC stack testing

J. A. SchulerZ. WuilleminA. Hessler-WyserC. CommingesN. Y. Steiner  et al.

Journal Of Power Sources. 2012. DOI : 10.1016/j.jpowsour.2012.03.045.

Combined Cr and S poisoning in solid oxide fuel cell cathodes

J. A. SchulerH. YokokawaC. F. CalderoneQ. JeangrosZ. Wuillemin  et al.

Journal Of Power Sources. 2012. DOI : 10.1016/j.jpowsour.2011.10.123.

Three-dimensional microstructural changes in the Ni-YSZ solid oxide fuel cell anode during operation

G. J. NelsonK. N. GrewJ. R. IzzoJ. J. LombardoW. M. Harris  et al.

Acta Materialia. 2012. DOI : 10.1016/j.actamat.2012.02.041.

2011

Design of experiment approach applied to reducing and oxidizing tolerance of anode supported solid oxide fuel cell. Part I: Microstructure optimization

A. FaesJ.-M. FuerbringerD. MohamediA. Hessler-WyserG. Caboche  et al.

2011. 9th European SOFC Forum, Lucerne, SWITZERLAND, Jun 29-Jul 02, 2010. p. 7058 - 7069. DOI : 10.1016/j.jpowsour.2010.07.092.

Laser Welding of Nickel-Titanium and Stainless Steel Wires : Processing, Metallurgy and Properties

J. Vannod / M. RappazA. Hessler-Wyser (Dir.)

Lausanne, EPFL, 2011. DOI : 10.5075/epfl-thesis-5120.

Nd-Nickelate Solid Oxide Fuel Cell Cathode Sensitivity to Cr and Si Contamination

J. A. SchulerH. LübbeA. Hessler-WyserJ. Van Herle

2011. European Fuel Cell Forum 2011.

Design of experiment approach applied to reducing and oxidizing tolerance of anode supported solid oxide fuel cell. Part II: Electrical, electrochemical and microstructural characterization of tape-cast cells

A. FaesZ. WuilleminP. TanasiniN. AccardoS. Modena  et al.

Journal of Power Sources. 2011. DOI : 10.1016/j.jpowsour.2010.11.146.

Mitigating Cr Contamination by Hot Air Filtering in Solid Oxide Fuel Cells

J. A. SchulerA. J. SchulerD. PennerA. Hessler-WyserC. Ludwig  et al.

Electrochemical and Solid State Letters. 2011. DOI : 10.1149/2.002112esl.

Multi-Scale Assessment of Cr Contamination Levels in SOFC Cathode Environment

J. A. SchulerA. J. SchulerZ. WuilleminA. Hessler-WyserC. Ludwig  et al.

2011. 12th International Symposium on Solid Oxide Fuel Cells (SOFC), Montreal, CANADA, May 01-06, 2011. DOI : 10.1149/1.3570190.

Mechanical and microstructural integrity of nickel-titanium and stainless steel laser joined wires

J. VannodM. BornertJ.-E. BidauxL. BataillardA. Karimi  et al.

Acta Materialia. 2011. DOI : 10.1016/j.actamat.2011.06.031.

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

A. Hessler-WyserZ. WuilleminJ. A. SchulerA. FaesJ. Van herle

Journal of Materials Science. 2011. DOI : 10.1007/s10853-011-5347-5.

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

J. A. SchulerZ. WuilleminA. HesslerJ. Van Herle

Electrochemical and Solid State Letters. 2011. DOI : 10.1149/1.3516622.

Air Side Contamination in Solid Oxide Fuel Cell Stack Testing

J. A. SchulerC. GehrigZ. WuilleminA. J. SchulerJ. Wochele  et al.

Journal of Power Sources. 2011. DOI : 10.1016/j.jpowsour.2010.10.058.

2010

Analyse des polluants d'une pile à combustible à oxyde solide (SOFC)

C. Gehrig

2010

Air Side Contamination in SOFC Stack Testing

J. A. SchulerC. GehrigZ. WuilleminA. J. SchulerJ. Wochele  et al.

2010. European Fuel Cell Forum 2010, Luzern, Schweiz, July, 2010. p. 114 - 130.

Rapid chromium quantification in solid oxide fuel cell cathodes

J. A. SchulerP. TanasiniA. HesslerJ. Van herle

Scripta Materialia. 2010. DOI : 10.1016/j.scriptamat.2010.06.046.

In situ redox cycle of a nickel-YSZ fuel cell anode in an environmental transmission electron microscope

Q. JeangrosA. FaesJ. B. WagnerT. W. HansenU. Aschauer  et al.

Acta Materialia. 2010. DOI : 10.1016/j.actamat.2010.04.019.

Fabrication et caractérisation de pile à combustible SOFC : influence de la microstructure des électrodes

S. Kerrache

2010

Cathode thickness-dependent tolerance to Cr-poisoning in solid oxide fuel cells

J. A. SchulerP. TanasiniA. HesslerC. ComninellisJ. Van Herle

Electrochemistry Communications. 2010. DOI : 10.1016/j.elecom.2010.09.024.

Modification of textured silicon wafer surface morphology for fabrication of heterojunction solar cell with open circuit voltage over 700mV

L. FesquetS. OlibetJ. Damon-LacosteS. De-WolfA. Hessler-Wyser  et al.

2010. 34th IEEE PVSC, Philadelphia, PA, 2009. p. 000754 - 000758. DOI : 10.1109/PVSC.2009.5411173.

Properties of interfaces in amorphous/crystalline silicon heterojunctions

S. OlibetE. Vallat-SauvainL. FesquetC. MonachonA. Hessler-Wyser  et al.

Physica Status Solidi (a). 2010. DOI : 10.1002/pssa.200982845.

2009

Ni/YSZ cermet anode degradation modelling and novel image analysis method for the quantification of the three-phase-boundary length

D. PresvytesA. FaesA. Hessler-WyserC. VayenasJ. Van Herle

2009. 7th Panhellenic Scientific Chemical Engineering Conference, Patras, June 3-5, 2009.

Solid oxide fuel cell redox instability characterized by in situ transmission electron microscopy

Q. JeangrosA. FaesJ. WagnerT. HansenR. Dunin-Borkowski  et al.

11ème colloque de la Société Français des Microscopies, Paris, June 22-26, 2009.

Characterisation of Laser Welds, between Nitinol and Stainless Steel Wires

J. VannodA. Hessler-WyserM. Rappaz

2009. p. 255 - 256.

In situ reduction and oxidation of nickel from solid oxide fuel cells in a Titan ETEM

Q. JeangrosA. FaesJ. WagnerA. Hessler-WyserJ. Van herle

2009. Microscopy Conference 2009, Graz, August 30-September 4, 2009. p. 521 - 522.

Characterisation of Laser Welds, between Nitinol and Stainless Steel Wires

J. VannodA. Hessler-WyserM. Rappaz

Microscopy Conference 2009, Graz, August 30-September 4, 2009.

In situ Reduction and Oxidation of Nickel from Solid Oxide Fuel Cells in a Transmission Electron Microscope

A. FaesQ. JeangrosJ. B. WagnerT. W. HansenJ. Van herle  et al.

ECS Transactions. 2009. DOI : 10.1149/1.3205743.

Nickel-Zirconia Anode Degradation and Triple Phase Boundary Quantification from Microstructural Analysis

A. FaesA. Hessler-WyserD. PresvytesC. G. VayenasJ. Van herle

Fuel Cells. 2009. DOI : 10.1002/fuce.200800147.

In situ reduction and oxidation of nickel from solid oxide fuel cells in a Titan ETEM

A. FaesQ. JeangrosJ. B. WagnerT. W. HansenJ. Van herle  et al.

SOFC-XI, Vienna, October 4-9, 2009.

Experimental and Theoretical Investigation of Degradation Mechanisms in SOFC Electrodes

P. TanasiniM. CannarozzoP. CostamagnaA. FaesJ. Van herle  et al.

Fuel Cells. 2009. DOI : 10.1002/fuce.200800192.

Sulfur as pollutant species on the cathode side of a SOFC system

A. SchulerZ. WuillementA. Hessler-WyserJ. Van herler

2009. Microscopy Conference 2009, Graz, August 30-September 4, 2009. p. 321 - 322.

RedOx study of anode supported solid oxide fuel cell

A. FaesA. NakajoA. Hessler-WyserD. DuboisA. Brisse  et al.

Journal of Power Sources. 2009. DOI : 10.1016/j.jpowsour.2008.12.118.

In situ reduction and oxidation of nickel from solid oxide fuel cells in a Titan ETEM

Q. JeangrosA. FaesJ. WagnerA. Hessler-WyserJ. Van herle  et al.

Microscopy Conference 2009, Graz, August 30- September 4, 2009.

2008

Textured silicon heterojunction solar cells with over 700mV open-circuit voltage studied by transmission electron microscopy

S. OlibetC. MonachonA. Hessler-WyserE. Vallat-SauvainL. Fesquet  et al.

2008. 23 EUPVSEC, Valencia, September 1-5, 2008. DOI : 10.4229/23rdEUPVSEC2008-2DO.1.2.

Nd:YAG laser joining between stainless steel and nickel-titanium shape memory alloys

J. VannodA. Hessler-WyserM. Rappaz

2008. 14th European Microscopy Congress, Aachen, September 1-5, 2008. p. 501 - 502. DOI : 10.1007/978-3-540-85226-1_251.

Quantitative study of anode microstructure related to SOFC stack degradation

A. FaesA. Hessler-WyserD. PresvytesA. BrisseC. G. Vayenas  et al.

2008. 14th European Microscopy Congress, Aachen, September 1-5, 2008. p. 763 - 764. DOI : 10.1007/978-3-540-85156-1_382.

Redox study of anode supported solid oxide fuel cell

A. FaesA. Hessler-WyserA. BrisseS. ModenaJ. Van herle

Fuel Cells Science and Technology 2008, Copenhagen, October 8-9, 2008.

Quantitative study of anode microstructure related to SOFC stack degradation

A. FaesA. Hessler-WyserD. PresvytesA. BrisseC. G. Vayena  et al.

14th European Microscopy Congress, Aachen, September 1-5, 2008..

Quantitative study of Ni-zirconia anode micro- and nanostructure related to SOFC stack degradation

A. FaesA. Hessler-WyserD. PresvytesA. BrisseG. C. Vayenas  et al.

6th NanoEurope Congress, St-Gallen, September 16-17, 2008.

TEM characterization of textured silicon heterojunction solar cells

A. Hessler-WyserC. MonachonS. OllibetC. Ballif

EMC2008, Aachen, September 1-5, 2008.

Rapid preparation and SEM microstructural characterization of nickel-yttria- stabilized zirconia cermets

C. MonachonA. Hessler-WyserA. FaesJ. Van HerleE. Tagliaferri

Journal of the American Ceramic Society. 2008. DOI : 10.1111/j.1551-2916.2008.02538.x.

TEM characterization of textured silicon heterojunction solar cells

A. Hessler-WyserC. MonachonS. OlibetC. Ballif

2008. 14th European Microscopy Congress. p. 335 - 336. DOI : 10.1007/978-3-540-85226-1_168.

2007

Methods for quantification of anode support microstructure

A. FaesA. Hessler-WyserC. MonachonM. ZahidE. Tagliaferri  et al.

4th Real-SOFC Workshop, Grenoble, France, 10-11 July 2007.

Reduction and Oxidation Study of Anode Supported Solid Oxide Fuel Cell

A. FaesA. Hessler-WyserC. MonachonM. ZahidE. Tagliaferri  et al.

Euromat2007, Nürnberg, Germany, 10-13 September 2007.

Étude de Réduction et d’Oxydation de l’Anode d’une Pile à Combustible à Oxyde Solide à Support Anode (SOFC)

A. FaesA. Hessler-WyserC. LalanneM. ChristianM. Zahid  et al.

Xème Colloque de la Société Française des Microscopie (SFmu-2007), Grenoble, France, 5-8 June 2007.

2004

Use of quantitative EELS and cathodoluminescence for study of carrier confinement and diffusion in self organized vertical quantum wells

K. LeiferS. MautinoH. WemanA. RudraE. Pelucchi  et al.

Design and Nature. 2004.

2003

Microstructure at submicron scale of the white layer produced by EDM machinig

G. CusanelliA. Hessler-WyserF. BobardR. DemellayerR. Perez  et al.

2003. 14th International Symposium on Electromachining (ISEM XIV). p. 289 - 295. DOI : 10.1016/j.jmatprotec.2003.11.047.

Nature of the Ag-Si Interface in Screen Printed Contacts: A Detailed Transmission Electron Microscopy Study of Cross-Sectional Structures

C. BallifD. M. HuljicA. Hessler-WyserG. Willeke

2003. 29th IEEE Photovoltaic Specialists Conference 2002, New Orleans, May 20-24, 2002. p. 360 - 363. DOI : 10.1109/PVSC.2002.1190533.

Silver thick-film contacts on high doped n-type silicon emitters : Structural and electronic properties of the interface

C. BallifD. HuljicG. WillekeA. Hessler-Wyser

Applied Physics Letters. 2003. DOI : 10.1063/1.1562338.

Use of quantitative EELS and cathodoluminescence for study of carrier confinement and diffusion in self organised vertical quantum wells

A. G. CullisP. A. MidgleyK. LeiferS. MautinoH. Weman  et al.

2003. Microscopy of Semiconducting Materials, Cambridge, 31 March-3 April 2003. p. 131 - 134. DOI : 10.1201/9781351074636-30.

Microstructural analysis of Ag thick-film contacts on n-type silicon emitters

D. HuljicC. BallifA. Hessler-WyserG. Willeke

2003. 3rd World Conference on Photovoltaic Energy Conversion 2003, Osaka, May 11 - 18 , 2003. p. 83 - 86.

2001

Multilayered phase formation after high-fluence implantation of nickel into aluminium

A. Hessler-WyserA. CuenatM. DoebeliC. AbromeitR. Gotthardt

Philosophical Magazine Letters. 2001. DOI : 10.1080/09500830110085000.

TEM Studies of In-Situ Martensitic Transformation in NiTi Thin Films

S. CrevoiseratT. LehnertA. Hessler-WyserR. Gotthardt

Journal de Physique IV. 2001. DOI : 10.1051/jp4:2001869.

1999

Etude de zones amorphes induites dans l'aluminium par implantation de nickel

A. Hessler-Wyser / R. Gotthardt (Dir.)

Lausanne, EPFL, 1999. DOI : 10.5075/epfl-thesis-1966.

Teaching & PhD

PhD Students

Marie Amélie Camille Courtant, Chiara Ongaro, Mostafa Othman, Yu-Hsuan Lai

Past EPFL PhD Students

Guillaume Pasche, Federica Landucci, Jonathan Thomet, Caroline Hain, Sofia Libraro

Past EPFL PhD Students as codirector

Antonin Faes, Jonas Vannod, Josef Andreas Schuler, Léa Deillon, Quentin Jeangros

Courses

Introduction to microscopy + Laboratory work

MSE-352

This course of introduction to microscopy aims at giving an overview of the various techniques of microstructure and composition analysis of materials. It focuses in particular on electron and optical microscopy. This course is composed of lectures and practical demonstrations on microscopes.