Spatially-resolved characterisation is crucial to understand micro- and nano-scale phenomena underpinning the operation of optoelectronic devices and guide their development. In the case of halide perovskites, both reversible (hysteresis / self-healing) and irreversible (degradation) instabilities provide additional challenges compared to more established optoelectronic materials.
This symposium will focus on techniques using electron, optical and x-ray microscopy and spectroscopy, to unravel nanoscale and microscale properties and dynamics of perovskite materials (in films, bulk and nanocrystal form). It will also cover the use of multi-dimensional, hyperspectral and scanning electron diffraction approaches to maximise information retrieval and data interpretation.
- Electron microscopy/spectroscopy
- Optical microscopy/spectroscopy
- X-ray characterisation
- Hyperspectral imaging
- In situ characterisation
- Perovskites
Dr Stefania Cacovich is currently a CNRS researcher working at IPVF. Her research activity lies in the field of the advanced characterization of hybrid and inorganic materials for photovoltaic applications by employing a multi-scale and multi-technique approach.
Her research into hybrid devices started during her doctoral studies (2014-2018), carried out at the Department of Materials Science of the University of Cambridge (UK) under the supervision of Prof Caterina Ducati. Her thesis focused on the study of the chemical, structural and morphological properties of hybrid organic-inorganic thin films and photovoltaic devices using advanced analytical electron microscopy techniques. In 2018, she moved to Paris for a postdoctoral research position at IPVF to work on multidimensional spectrally and time resolved photoluminescence imaging methods. From 2020-2022, she was Marie Curie Individual Post-doctoral fellow in Physics at CNRS (UMR 9006) with a project aimed at exploring the fundamental photophysical processes underlying the operation of advanced optoelectronic devices.
René Janssen is university professor at the Eindhoven University of Technology (TU/e). He received his Ph.D. in 1987 from the TU/e for a thesis on electron spin resonance and quantum chemical calculations of organic radicals in single crystals. He was lecturer at the TU/e since 1984, and a senior lecturer in physical organic chemistry since 1991. In 1993 and 1994 he joined the group of Professor Alan J. Heeger (Nobel laureate in 2000) at the University of California Santa Barbara as associate researcher to work on the photophysical properties of conjugated polymers. Presently the research of his group focuses on functional conjugated molecules and macromolecules as well as hybrid semiconductor materials that may find application in advanced technological applications. The synthesis of new materials is combined with time-resolved optical spectroscopy, electrochemistry, morphological characterization and the preparation of prototype devices to accomplish these goals. René Janssen has co-authored more than 600 scientific papers. He is co-recipient of the René Descartes Prize from the European Commission for outstanding collaborative research, and received the Research Prize of The Royal Institute of Engineers and in The Netherlands for his work. In 2015 René Janssen was awarded with the Spinoza Prize of The Dutch Research Council.
He studied electrical engineering in Stuttgart and started working on Si solar cells in 2004 under the guidance of Uwe Rau at the Institute for Physical Electronics (ipe) in Stuttgart. After finishing his undergraduate studies in 2006, he continued working with Uwe Rau first in Stuttgart and later in Juelich on simulations and electroluminescence spectroscopy of solar cells. After finishing his PhD in 2009 and 1.5 years of postdoc work in Juelich, Thomas Kirchartz started a three year fellowship at Imperial College London working on recombination mechanisms in organic solar cells with Jenny Nelson. In 2013, he returned to Germany and accepted a position as head of a new activity on hybrid and organic solar cells in Juelich and simultaneously as Professor for Photovoltaics with Nanostructured Materials in the department of Electrical Engineering and Information Technology at the University Duisburg-Essen. Kirchartz has published >100 isi-listed papers, has co-edited one book on characterization of thin-film solar cells whose second edition was published in 2016 and currently has an h-index of 38.
Philip Schulz holds a position as Research Director for Physical Chemistry and New Concepts for Photovoltaics at CNRS. In this capacity he leads the “Interfaces and Hybrid Materials for Photovoltaics” group at IPVF via the “Make Our Planet Great Again” program, which was initiated by the French President Emmanuel Macron. Before that, Philip Schulz has been a postdoctoral researcher at NREL from 2014 to 2017, and in the Department of Electrical Engineering of Princeton University from 2012 to 2014. He received his Ph.D. in physics from RWTH Aachen University in Germany in 2012.