People

Prof. Dr. Natalie Banerji

Natalie Banerji is currently a Full Professor of Chemistry at the University of Bern and leads the FemtoMat group. Her research interests include the study of organic and hybrid materials using ultrafast spectroscopic techniques, in view of solar cell and bioelectronic applications. She studied Chemistry at the University of Geneva and obtained her Ph.D. in Physical Chemistry in 2009, under the supervision of Prof. Eric Vauthey. She then moved to the University of California in Santa Barbara (USA), to work on organic solar cells during a post-doctoral stay with Nobel Laureate Prof. Alan J. Heeger (2009-2011). In 2011, she started her independent research career in Switzerland at the Ecole Polytechnique Férérale de Lausanne (EPFL) with an Ambizione Fellowship by the Swiss National Science Foundation (SNSF). She moved to the University of Fribourg in 2014, was subsequently nominated Associate Professor in 2015, and presided the Chemistry Department in Fribourg form 2016-2017. Click here for her full CV.

Contact: natalie.banerji@unibe.ch
Office 525

Dr. Julien Réhault

Julien joined the Femtomat group as a Postdoc in August 2017 and became Research Associate in June 2018. His research interests involve any kind of Ultrafast Laser Spectroscopy ranging from the ultraviolet to the Terahertz. He is mainly involved in developing new tools for the field of Organic Bioelectronics, especially in the Terahertz.

Click here for his full CV.

Contact: julien.rehault@unibe.ch

Dr. Demetra Tsokkou

Demetra joined the FemtoMat group as a Post-Doctoral Researcher in February 2015. She studied Physics at the University of Cyprus and obtained her Ph.D. with Prof. Andreas Othonos in 2012.

Contact: dimitra.tsokkou@unibe.ch

Dr. Olivier Bardagot

Olivier started his Post Doctoral position in the FemtoMat group in 2020 to join the bio-electronics team in their investigations of accumulation mode Organic ElectroChemical Transistor (OECT) devices. He obtained his Masters in Nanoscience and Physics Engineering at the Grenoble Institute of Technology in partnership with Imperial College London. He obtained his PhD at the University Grenoble Alpes (France) with Dr. Renaud Demadrille in 2019 for his work on organic semiconductors for thermoelectric and photovoltaic applications.

His research can be found here.

Contact: olivier.bardagot@unibe.ch

Dr. Rishi Shivhare

Rishi completed his masters at Indian Institute of Science(IISc), Bangalore followed by PhD at Technical University of Dresden.
He joined the femtomat team to investigate organic photovoltaics with terahertz absorption and emission spectroscopic methods.

His research can be found here.

Contact: rishi.shivare@unibe.ch

Dr. Gareth Moore

Gareth joined the FemtoMat group as a Ph.D. student in December 2017. He studied Physics at the University of Pretoria and obtained his Masters degree there in 2017.

Contact: gareth.moore@unibe.ch

Dr. Gonzague Rebetez

Gonzague joined the Femtomat group as a PhD student in March 2018. His research interest is to understand the fundamental processes and working principles of organic electrochemical transistors (OECTs). He obtained his Master’s degree in chemistry from the University of Fribourg in Switzerland and did his Master project in the group of Prof. Rafal Klajn at the Weizmann Institute of Science in Israel.

Contact: gonzague.rebetez@unibe.ch

Kaila Yallum

After obtaining a bachelor’s degree at Northeastern University in 2017, Kaila joined the FemtoMat group as a Masters student in 2018 and started as PhD student in September 2019. She uses multiple spectroscopic techniques to investigate charge generation in organic photovoltaic materials such as Transient Absorption, Electromodulated Differential Absorption, and External Quantum Efficiency.

Contact: kaila.yallum@unibe.ch

Priscila Cavassin

Priscila joined the FemtoMat group as a Ph.D. student in December 2019. She obtained her Masters degree in Applied Physics at the University of Sao Paulo in 2019. Her research focuses on the SFG characterisation of organic bioelectronic devices.

Contact: priscila.cavassin@unibe.ch

Eva Röck

Eva graduated with a Master of Science in Physics from the University of Vienna in 2020, where she specialized in Electronic Properties of Materials and Spectroscopy. She joined the FemtoMat group as a PhD student to investigate doped organic semiconductors. Her current project focuses on excited state dynamics of organic polymers and their correlations with doping-induced polarons.

Contact: eva.roeck@unibe.ch

Cedric Hoffmann

Cedric joined the FemtoMat group as a Ph.D. student in May 2021. He obtained his master’s degree in Chemistry at Technical University of Dresden in 2021, where he worked on organic semiconducting materials and organic electrochemical transistors.

Contact: cedric.hoffmann@unibe.ch

Isabelle Holzer

Isabelle joined the FemtoMat group in January 2021 as a Master student and started as a PhD student in March 2022. She currently investigates different semiconducting materials using multiple spectroscopic techniques such as THz spectroscopy, spectroelectrochemistry, and Raman spectroscopy.

Contact: isabelle.holzer@unibe.ch

Kaishuai Zhang

Kaishuai joined the FemtoMat group in August 2022 as a PhD Student focused on spectroelectrochemistry of glycolated polymers and 2D materials.

Contact: kaishuai.zhang@unibe.ch

Lukas Gut

Lukas joined the FemtoMat group in January 2021 as a Masters student after completing the BSc in Chemistry and Molecular Sciences at the University of Bern in 2020. His work focuses on the investigation of electrochemical doping of organic electrochemical transistors in views of biomedical applications.

Contact: lukas.gut@students.unibe.ch

Tristan Blandenier

Tristan joined the FemtoMat group in January 2022 as a MSc student in Chemistry and Molecular Sciences at the University of Bern, where he also completed his BSc in Chemistry and Molecular Sciences. As part of his Master project, he investigates charge generation in organic photovoltaic materials.

Contact: tristan.blandenier@students.unibe.ch

Christian Franz

Christian completed his BSc in Chemistry and Molecular Sciences at the
University of Bern in 2021. He joined the FemtoMat group in February 2022 for his Master’s project, which involves treatment effects on PEDOT:PSS and investigation of 2D conjugated polymers.

Contact: christian.franz@students.unibe.ch

Former Group Members

Basil Hunger

Basil started his Bachelor in Chemistry and Molecular Sciences at the
University of Bern in 2019. For the Bachelor project he joined FemtoMat group in February 2022 where he investigates the doping of P3HT with anion exchange.

Contact: basil.hunger@students.unibe.ch

Marco Finger

Marco joined the FemtoMat group in February 2021 as an undergraduate student in Chemistry at the University of Bern. His Bachelor project involves a fundamental investigation of Non-Fullerene Acceptors in various solvents.

Contact: marco.finger@students.unibe.ch

Frédéric Schneider joined the FemtoMat group as a Master student in January 2019. He obtained his Bachelor’s degree in 2018 in the field of Chemistry and Molecular Sciences at the University of Bern.

Dr. Bruno Nicolau joined the FemtoMat group as a Post-Doctoral Researcher in 2019. He studied Chemistry at the University of Sao Paulo (Brazil) and obtained his Ph.D at the University of Illinois at Urbana-Champaign (USA) with professors Andrew Gewirth and Ralph Nuzzo in 2018. In his time at FemtoMat, he worked on developing a visible pump-SFG probe experiment for the characterization of morphological changes in organic Biolelectronic materials.

Jana Daepp joined the Femtomat group as a Master Student in January 2019. She obtained her Bachelors degree in Bern and now investigates ion mobility in doped polymers used in organic electrochemical transistors (OECTs).

Dr. Yufei Zhong joined the FemtoMat group as a Post-Doctoral Researcher in 2017. He studied applied chemistry in University of Tokyo for his PhD following Prof. Hashimoto Kazuhito (current President of NIMS). Before joining FemtoMat team, he did his postdoc in Riken following Dr.Tajima Keisuke in 2014, and after that he moved to KAUST for another postdoc position in Prof.Aram Amassian’s team till 2016.

Dr. Philipp Krauspe joined the FemtoMat group as a Ph.D. student in May 2016 to work on Optical Pump THz Probe on PBTTT:PCBM blends, THz Emission in organic semiconductors and perovskites. He studied Physics at the University of Konstanz and obtained his Masters degree in 2015.

Dr. Nikolaos Droseros joined the FemtoMat group as a Ph.D. student in October 2015. He studied Physics at the University of Patras and obtained his Masters degree in 2015.

Dr. Martina Causa’ joined the FemtoMat group as a Ph.D. student in September 2014. She obtained her Bachelor Degree in Chemistry from the University of Turin in 2011, and her Master Degree in Chemistry from the Ecole Polytechnique Fédérale de Lausanne (EPFL) in 2014. She completed the Ph.D. program in 2019 with her thesis on the Microstructural and Electronic Effects on Ultrafast Photophysical Processes in Organic Photovoltaic Systems.

Dr. Lisa Peterhans joined the FemtoMat group as a Ph.D. student in October 2014. She completed her Ph.D. program in 2019 with her thesis on the photophysics of nuleic acid aggregates.

Joel Affolter joined the group as a Bachelor student in February 2019 and completed his project in June 2019. His project involved the spectroscopic investigation of PEDOT:PSS.

Aleksandra Burlakova joined the FemtoMat group as Master student from January 2019 – November 2019. Her project investigated the doped organic semiconductors and short-range conductivity using THz spectroscopy.

Dr. Muddassir Iqbal joined the FemtoMat group as PostDoc Researcher at the University of Fribourg for one year (September 2015-2016)

Dr. Mariateresa Scarongella obtained her Doctoral Degree in July 2015. She was working as a Ph.D. student from 2012 at the Ecole Polytechnique Fédérale de Lausanne (EPFL) under the co-supervision of Natalie and Prof. Moser.

Arun Aby Paraecattil carried out his Semester and Master Projects with Natalie at the Ecole Polytechnique Fédérale de Lausanne (EPFL) in 2012-2013.

Jenny Farquhar carried out a Laboratory Project and her Master Thesis with Natalie at the University of Fribourg in 2016-2017.

Dr. Jan Brauer worked in FemtoMat group at the University of Fribourg as a Post Doctoral Researcher for three years (2014-2017).