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Thin Films and Interfaces Group

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The Thin Films and Interfaces Group

Thin films are nowadays utilized in many applications, ranging from semiconductor devices to optical coatings and are even present in pharmaceuticals (polymers). This wide-spread application of films with thicknesses from atomic monolayers to microns is due to the developments of thin film deposition techniques. Thin films are also important for studies of materials with new and unique properties due to the possibility of tuning their crystallographic and morphological properties. The thin film approach, i.e. the presence of interfaces (to a substrate or the film surface) adds more degrees of freedom for influencing the properties of materials, e.g. by lattice strain or surface functionalization. For these fundamental studies of material properties large research facilities such as synchrotron radiation or neutron spallation sources are one of the keys that the Paul Scherrer Institute (PSI) provides. Read more

News

15. November 2018

Woman in Science

Congratulations to our former postdoc, Alexandra Palla-Papavlu (4th from the left), for winning the L’Oreal Prize for Woman in Science(link is external) in the category Physics in Romania

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Upcoming Conferences

 

April 2020

2020 MRS Spring Meeting & Exhibit

April 13-17, 2020
Phoenix, Arizona, USA
More Information

2020 International High Power Laser Ablation Symposium

rescheduled to April 12-15, 2021
Santa Fe, New Mexico, USA
More Information
 

 

Upcoming Seminars

 

Currently, all upcoming seminar will be internal, online group seminars. As soon as we are able to proceed with seminars with an audience, we will announce them on this web page. We apologize for the inconvenience.

 

TFI SEMINAR

Title: TBA
Speaker:  Tim Schmitt
Date: 22. Feb. 2021, 16:00
Room: Zoom
 

 

TFI SEMINAR

Title: TBA
Speaker:  Luca Indrizi
Date: 08. Mar. 2021, 16:00
Room:Zoom

 

LMX SEMINAR

Title: TBA
Date: 09. Feb. 2021, 13:00
Room: Zoom

Scientific Highlights

7. April 2020
Lawley et al

Examining the surface evolution of LaTiOxNy an oxynitride solar water splitting photocatalyst

LaTiOxNy oxynitride thin films are employed to study the surface modifications at the solid- liquid interface that occur during photoelectrocatalytic water splitting. Neutron reflectometry and grazing incidence x-ray absorption spectroscopy were utilised to distinguish between the surface and bulk signals, with a surface sensitivity of 3 nm.

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6. Januar 2020
OER/LOER and dissolution/ redeposition mechanism

Energy Conversion Processes with Perovskite-type Materials

Mixed oxides derived from the perovskite structure by combination of A- and B-site elements and by partial substitution of oxygen provide an immense playground of physico-chemical properties. Here, we give an account of our own research conducted at the Paul Scherrer Institute on perovskite-type oxides and oxynitrides used in electrochemical, photo(electro)chemical and catalytic processes aimed at facing energy relevant issues.

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6. Januar 2020
Oxygen diffusion

Oxygen diffusion in oxide thin films grown on SrTiO3

SrTiO3 thin films were grown on 18O-exchanged SrTiO3 single crystalline substrates by pulsed-laser deposition, rf sputtering, and oxide molecular-beam epitaxy to study their oxygen diffusion depth profiles using secondary ion mass spectrometry and elastic recoil detection analysis depth profiling. The oxygen depth profiling shows that SrTiO3 films prepared with the three different deposition techniques will take oxygen from the substrate, even at room temperature. This confirms that the substrate is one possible oxygen source for the growth of oxide thin films independent of the physical vapor deposition technique employed. It was also found that a reactive oxygen environment changes the oxygen composition of the substrate during the growth of a film and partly replaces 18O with 16O up to a depth of several tens of nm. These findings imply that SrTiO3 and therefore other ion conducting oxide substrates, which are commonly used as platforms for thin film growth, can be considered capricious in nature with respect to oxygen chemistry and lattice constants.

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11. Februar 2019

Electronic localization in CaVO3 films via bandwidth control

Understanding and controlling the electronic structure of thin layers of quantum materials is a crucial first step towards designing heterostructures where new phases and phenomena, including the metal-insulator transition (MIT), emerge. Here, we demonstrate control of the MIT via tuning electronic bandwidth and local site environment through selection of the number of atomic layers deposited.

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8. Februar 2019
Thermally activated two-dimensional artificial square ice with height offsets between nanomagnets.(A) Tilted-sample scanning electron microscopy (SEM) image of an artificial square ice with an introduced height offset h, which can be varied from sample to sample, until the competing interactions J1 and J2 are equalized and an extensive spin ice degeneracy is achieved. Scale bar, 400 nm. (B) XMCD image of the same artificial square ice array. Nanomagnets with moments pointing toward the incoming x-rays (i…

Emergent magnetic monopole dynamics in macroscopically degenerate artificial spin ice

Magnetic monopoles, proposed as elementary particles that act as isolated magnetic south and north poles, have long attracted research interest as magnetic analogs to electric charge. In solid-state physics, a classical analog to these elusive particles has emerged as topological excitations within pyrochlore spin ice systems. We present the first real-time imaging of emergent magnetic monopole motion in a macroscopically degenerate artificial spin ice system consisting of thermally activated Ising-type nanomagnets lithographically arranged onto a pre-etched silicon substrate. factors are observed.

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31. Oktober 2017
TL Ishihara 2.jpg

Special interview with Prof. Thomas Lippert and Prof. Tatsumi Ishihara

Special interview with Prof. Thomas Lippert (PSI and Principle Investigator at I2CNER, Kyushu University) and Prof. Tatsumi Ishihara (Associate Director I2CNER, Kyushu University) on Current and Future Energy Research and Development in Europe: Perspectives from Switzerland, Germany and Japan. The interview is being published in the August 2017 issue of the Energy Outlook of the International Institut for Carbon-Neutral Energy Research, I2CNER.

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PhD projects at the Thin Films and Interfaces Group

At present, we have one open PhD positions available. Details are posted at our open position page. Other open positions are always published on the PSI Open Positions page.


Most Recent Publications

LaTiO2N crystallographic orientation control significantly increases visible-light induced charge extraction
PLD_Li-Review_2021

Pulsed Laser Deposition as a Tool for the Development of All Solid- State Microbatteries

Luca Indrizzi, Natacha Ohannessian, Daniele Pergolesi, Thomas Lippert, Elisa Gilardi;

Abstract:

All‐solid‐state lithium ion batteries (LIB) are currently the most promising technology for next generation electrochemical energy storage. Many efforts have been devoted in the past years to improve performance and safety of these devices. Nevertheless, issues regarding chemical and mechanical stability of the different components still hinder substantial improvements. Pulsed laser deposition (PLD) has proved to be an outstanding technique for the deposition of thin films of materials of interest for the fabrication of LIB. Thanks to its versatility and possible fine tuning of the thin film properties, PLD promises to be a very powerful tool for the fabrication of model systems which would allow to study in detail material properties and mechanisms contributing to LIB degradation. Nevertheless, PLD presents difficulties in the deposition of LIB components, mainly due to the presence of elements with large difference of atomic mass in their chemical composition. In this review, we report the main challenges and solution strategies used for the deposition through PLD of complex oxides thin films for LIB.

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Contact

Thin Films and Interfaces Group
Paul Scherrer Institut
5232 Villigen PSI
Switzerland
Homepage

Professor Dr. Dr. h.c. Thomas Lippert
Head of Group
OFLB/U110
tel: +41 56 310 4076
fax: +41 56 310 2688
thomas.lippert@psi.ch

Seminars

Thin Films and Interfaces Group Seminars
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CMT seminar/journal club

Homepage NUM

Research with Neutrons and Muons NUM Division at PSI


PSI Scientific Reports

Archive 2006-2012. The Scientific Reports – containing accounts of research topics from all the different areas – provide an impression of the variety of subjects researched at PSI.


Open Positions

Job Opportunities at Research Division NUM.
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