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Who we are

We are a young and dynamic research group based in Bern, Switzerland, and led by Prof. Natalie Banerji. In our group, chemists as well as physicists and material scientists work side by side to understand and optimize electronic devices based on organic electronic materials. In addition, we combine the best of two worlds by welcoming researchers from all over the world and by teaching local students from Bern.

This combination of different backgrounds and experiences forms a powerful symbiosis that enables us to understand the underlying principles of charge transport in the materials we study.

Our research interests

Our objective is to understand fundamental material properties (e.g., light–matter interactions, electron transfer processes, charge transport, molecular recognition) of organic and hybrid semiconductors, with applications in new generation solar cells, organic transistors, and organic bioelectronics. The current gap between missing fundamental understanding and the blind development of applications needs to be filled in order to achieve intelligent design of high-performance devices.

Our research revolves around the central question of what happens on the ultrashort time scale and ultrasmall length scale in organic solids to induce macroscopic function in devices, and how this can be optimized. Experimentally, we use a complementary palette of techniques combining (time-resolved) spectroscopy, pulsed photocurrent methods, terahertz experiments, Stark-effect spectroscopy, and device testing.


  • Eva at MRS spring meeting in Seattle

    Eva at MRS spring meeting in Seattle

    Eva attended the annual MRS spring meeting that took place in Seattle this year. There, she presented her latest work on overcoming the limits of conductivity in organic semiconductors. Thanks for your contribution, Eva!

  • Soif attended CLEO conference in North Carolina

    Soif attended CLEO conference in North Carolina

    Soif traveled to North Carolina to present his work on Desensitizing Delf-trapped Excitonic Emission in Bi-Ho Co-doped Cs2AgInCl6 Nanocrystals at this year’s CLEO conference. Thanks for your contribution, Soif!

  • Natalie at ESEMA conference

    Natalie at ESEMA conference

    Natalie attended the ESEMA conference on the beautiful island of Porquerolles in France and gave an invited talk on spectroscopic investigations of non-fullerene-acceptor based solar cells.

  • New research published!

    New research published!

    We are pleased to announce our latest publication in The Journal of Physical Chemistry C. Our results reveal the ultrafast generation of both excitons and charges in MAPbBr3 upon photoexcitation. Many thanks to Michael Saliba for the collaboration and for providing the materials.

  • Introducing Dr. Priscila Cavassin

    Introducing Dr. Priscila Cavassin

    We are thrilled to announce that Priscila has successfully defended her PhD thesis on the spectro-electrochemical investigation of organic mixed ionic–electronic conductors. What a wonderful presentation and contribution to the field of bioelectronics!Congratulations from all of us, Pri!

  • New research published!

    New research published!

    We are delighted to announce our new publication by Isabelle. Our focus in this study was on the dynamics of the IDTBT polymers with different polar content. Thanks to Christian Nielsen for realizing this project!

  • Call for a PostDoc and a PhD student

    Call for a PostDoc and a PhD student

    We are happy to announce that we can fill a Post-Doctoral Position in SFG Spectroscopy as well as a PhD Position in Spectroscopy of OPVs! To get more information about the job offers, you can click on their titles. Interested? You can apply directly by contacting Natalie Banerji! We are looking forward to receiving your […]

  • New research published!

    New research published!

    We are excited to share some of our latest research with you! Kejun investigated a new polypyrrole-based quasi-2D polymer and found different charge transport properties depending on temperature and distance regime.

  • FemtoMat now also on Mastodon!

    FemtoMat now also on Mastodon!

    FemtoMat is now also available on Mastodon! Check out our profile there: From now on, we will provide you with news about our group and our latest research outcomes on this website as well as X and Mastodon.

  • FemtoMat group raclette

    FemtoMat group raclette

    We all really enjoyed this year’s group raclette evening hosted by Natalie! Thanks for the invitation and the nice evening full of fruitful conversations and lots of cheese!