Université de Strasbourg

Amparo Ruiz Carretero & Shu Seki

Biography - Amparo Ruiz Carretero

Charles Sadron Institute (ICS), University of Strasbourg and CNRS

Amparo Ruiz Carretero, USIAS Fellow 2020Amparo Ruiz Carretero is a research scientist at assistant professor level at the Charles Sadron Institute. She studied chemistry at the University of Castilla–La Mancha (Spain), where she obtained her PhD on the application of sustainable chemistry strategies for the synthesis of multiple hydrogen-bonded systems in 2009, under the supervision of Professor Antonio de la Hoz and Dr. Ana Sánchez-Migallón. She spent half of her PhD in the group of Professor Bert Meijer and Professor Albert Schenning at the Eindhoven University of Technology (TUE, The Netherlands) working on DNA-templated self-assembly and fabrication of hierarchical p-n heterojunctions based on liquid crystals. Dr. Ruiz Carretero held post-doctoral positions in the groups of Professor Samuel I. Stupp (Northwestern University, USA), working on hydrogen-bonded organic photovoltaic devices and organic ferroelectric materials, and Professor Luisa De Cola (University of Strasbourg), where she worked on charge transport studies on self-assembled square planar Pt(II) complexes.

Dr. Ruiz Carretero obtained her current position at the French National Centre for Scientific Research (CNRS) in 2015 and joined the team SYCOMMOR (SYstèmes Complexes Moléculaires et Macromoléculaires ORganisés), where she leads a sub-group focused on unraveling the role of hydrogen-bonding in organic electronics. Her research interests include the study of hydrogen-bonded semiconductors, supramolecular chirality and the influence of magnetic fields in organic electronics.

Biography - Shu Seki

Condensed Matter Physical Chemistry, Kyoto University, Japan & USIAS Fellow at the Charles Sadron Institute (ICS), University of Strasbourg and CNRS

Shu Seki, USIAS Fellow 2020Professor Shu Seki graduated from the University of Tokyo in 1991, and received a PhD from Osaka University in 2001. As a visiting scientist, he joined the Chemistry Division of the Argonne National Laboratory (USA) in 1995, and Delft University of Technology (The Netherlands) in 2000. He was appointed as professor of chemistry at the Graduate School of Engineering of Osaka University in 2008 and has, since 2015, held the position of professor of physical chemistry in the Department of Molecular Engineering, Kyoto University.

His research interests focus on condensed matter physical chemistry, particularly of conjugated molecular/macromolecular materials, as well as spectroscopy techniques with a variety of electromagnetic wave probes.

He was elected as a Fellow of the Royal Society of Chemistry in 2015, and has published over 450 papers in journals such as Science, Nature Materials, Nature Chemistry, etc. until 2020.

Project - Guiding charge carriers through chiral assemblies

01/09/2020 - 31/08/2022

One of the main challenges of our generation is finding sustainable energy sources that meet the increasing energy demand. Solar energy is a promising solution since it is clean, cheap and accessible. Organic solar cells can be fabricated at low energy cost, even though they still present issues that need to be addressed. The project proposes to enhance the energy efficiency of solar cells by reducing charge recombination, which is a frequently occurring phenomenon in organic photovoltaic devices. When charge carriers are created upon light illumination they frequently fail to be efficiently transported, and therefore do not contribute to the performance of the photovoltaic device. To do so, the aim is to explore supramolecular chiral semiconductors, where a preferred spin can be transmitted through a determined handedness structure.

This phenomenon has been recently described as the chiral-induced spin selectivity (CISS) effect. The aim of the project is to study the CISS effect by employing a fast screening method that does not require the fabrication of entire photovoltaic devices. A combined technique joining contactless microwave spectroscopy and electron paramagnetic resonance, pioneered by Professor Seki, will be used to perform full characterisation of spin states and charge carrier transport in simple thin films made of supramolecular chiral materials. Once the team has a good understanding of how molecular and supramolecular structure relates to the CISS effect, they can provide handles to the photovoltaics community to obtain superior devices. With an approach that uses chiral supramolecular fibres, Dr. Ruiz Carretero and Professor Seki foresee that the electrons and holes are efficiently transported after exciton splitting. In addition, they propose to accelerate the optimisation of the CISS effect in chiral assemblies by employing a rapid screening technique.

Investissements d'Avenir