Halide perovskites have demonstrated remarkable performance in optoelectronic applications like light-emitting diodes and solar cells. Yet the detailed photophysics underlying their exceptional properties is far from fully understood. This symposium aims to bring together the international science community to discuss the latest advances in the photophysics of bulk and nano-scale halide perovskites and related emerging materials. We will discuss the influence of chemical composition, dimensionality, defects and structural distortions on the light-matter interactions on various time-scales, based on both experimental and theoretical insights. Together, we will explore what is special about this material class, what currently limits their applications and how to overcome these in novel designed materials to push their efficiencies even further, ultimately enabling also new applications like photodetectors or quantum technology.
- Photophysics of bulk ‘3D’ halide perovskites
- Photophysics of low-dimensional ‘2-0D’ halide perovskites
- Photophysics of halide perovskite nanocrystals, rods, platelets
- Defect photophysics
- Ultrafast phenomena (hot carriers, polaronic distortions, etc)
- Theory and simulations of the photophysical properties of halide perovskites
- Emerging perovskite-related materials
Sascha is a Tenure-Track Assistant Professor in Physical Chemistry and Head of the Laboratory for Energy Materials at EPFL (Switzerland), while he is also maintaining strong ties with the Harvard community and in particular Winthrop House which he regularly visits as NRT and SCR member.
His team employs light-matter interactions to understand the next generation of soft semiconductors with the overarching goal of maximizing energy efficiency for a sustainable future by unlocking applications ranging from flexible light-weight solar cells & displays all the way to entirely new applications in quantum information processing.
Previously, he was a research group leader and Rowland Fellow at Harvard University. Before starting his lab at Harvard, Sascha studied Chemistry at Heidelberg University (Germany) and completed a PhD in Physics at the University of Cambridge (UK), where he subsequently worked as EPSRC Doctoral Prize Fellow.
Annamaria Petrozza received her PhD in Physics from the University of Cambridge (UK) in 2008 with a thesis on the study of optoelectronic processes at organic and hybrid semiconductors interfaces under the supervision of Dr. J.S. Kim and Prof Sir R.H. Friend. From July 2008 to December 2009 she worked as research scientist at the Sharp Laboratories of Europe, Ltd on the development of new market competitive solar cell technologies (Dye Sensitized Solar cells/Colloidal Quantum Dots Sensitized Solar cells). Since January 2010 she has a Team Leader position at the Center for Nano Science and Technology -IIT@POLIMI. She is in charge of the development of photovoltaic devices and their characterization by time-resolved and cw Photoinduced Absorption Spectroscopy, Time-resolved Photoluminescence and electrical measurements. Her research work mainly aims to shed light on interfacial optoelectronic mechanisms, which are fundamental for the optimization of operational processes, with the goal of improving device efficiency and stability.
Keshav Dani is currently an Associate Professor at the Okinawa Institute of Science and Technology (OIST), Graduate University in Okinawa, Japan. He joined OIST in Nov. 2011 as a tenure-track Assistant Professor after completing a Director’s Postdoctoral Fellowship at the Center for Integrated Nanotechnologies at Los Alamos National Laboratory. Keshav graduated from UC Berkeley in 2006 with a PhD in Physics, where he explored the nonlinear optical response of the quantum Hall system under the supervision of Daniel Chemla at LBNL. Prior to his PhD, he obtained a BS from Caltech in Mathematics with a senior thesis in Quantum Information Theory under John Preskill and Hideo Mabuchi. His current research interests lie in using novel time-resolved photoemission techniques (PEEM and ARPES) to understand the properties of photoexcited perovskite photovoltaic materials and two-dimensional semiconductor heterostructures.
Luisa De Marco received her PhD in Nanoscience from Università del Salento in 2010 working on nanostructured semiconductors for photovoltaics. Since 2016 she is researcher at CNR NANOTEC leading a 6-person team working on the development of low-dimensional inorganic and hybrid nanomaterials. She is author of more than 70 papers that collectively have received more than 2600 citations, with an h-index of 31. Among the publications stand out Advanced Materials, Nature Nanotechnology, Energy & Environmental Science, ACS Nano and Science Advances.
Her research interests focus on the development and engineering of hybrid and inorganic low-dimensional semiconductors having specifically tailored functional properties and on design and fabrication of optoelectronic devices.
Paulina Plochocka, Directrice de recherché de 2e classe (DR2) in Laboratoire National des Champs Magnétiques Intenses (LNCMI), CNRS in Toulouse.
P. Plochocka obtained her PhD cum-laude in 2004 at the University of Warsaw working on the dynamics of many-body interactions between carriers in doped semi-magnetic quantum wells (QW). During her first post doc at Weizmann Institute of science, she started working on the electronic properties of a high mobility 2D electron gas in the fractional and integer quantum Hall Effect regime. She continued this topic during second post doc in LNCMI Grenoble, where she was holding individual Marie Curie scholarship. At the same time, she enlarged her interest of 2D materials towards graphene and other layered materials as TMDCs or black phosphorus. In 2012 she obtained permanent position in LNCMI Toulouse, where she created the Quantum Electronics group, which investigates the electronic and optical properties of emerging materials under extreme conditions of high magnetic field and low temperatures. Examples include semiconducting layer materials such as transition metal dichalcogenides, GaAs/AlAs core shell nanowires and organic inorganic hybrid perovskites.
Carlos Silva earned a PhD in chemical physics from the University of Minnesota, with the late Professor Paul Barbara. His graduate research focused on ultrafast polar solvation dynamics, probed by transient absorption spectroscopy on the solvated electron and transition-metal mixed-valence complexes. Following his graduate degree in 1998, he was Postdoctoral Research Fellow with Professor Sir Richard Friend at the Cavendish Laboratory, University of Cambridge, where he developed an ultrafast spectroscopy laboratory to investigate the photophysics of conjugated polymers and related organic semiconductors. In 2001, he began his independent academic career as Advanced Research Fellow of the UK Engineering and Physical Science Research Council at the Cavendish Laboratory, and simultaneously became Research Fellow in Darwin College, University of Cambridge. He moved to the Université de Montréal with a Canada Research Chair in 2005, where he developed an ultrafast spectroscopy laboratory for the study of electronic processes in organic semiconductor materials. In recognition of his rising international leadership, he was awarded the 2010 Herzberg Medal and the 2016 Brockhouse Medal by the Canadian Association of Physicists. Since 2017, Carlos’s research career at Georgia Tech has built on his previous research experiences to bring innovative optical probes of organic and hybrid organic-inorganic semiconductor materials. His research program exploits a range of spectroscopic techniques, including nonlinear ultrafast spectroscopies such as two-dimensional coherent excitation spectroscopies, and quantum spectroscopy, in which quantum properties of light are exploited to unravel light-matter interactions with intricate detail. These techniques are applied to understand key electronic processes in a wide range of materials, with many target applications in optoelectronics, on timescales ranging from femtoseconds to milliseconds. He is a Fellow of the Royal Society of Chemistry.
Dr. Yana Vaynzof is the Chair for Emerging Electronic Technologies at the Technical University of Dresden (Germany) and a Director at the Leibniz Institute for Solid State and Materials Research Dresden. She received a B.Sc. in Electrical Engineering from the Technion – Israel Institute of Technology (Israel) in 2006 and a M. Sc. In Electrical Engineering from Princeton University (USA) in 2008. In 2011, she received a Ph.D. in Physics from the University of Cambridge (UK). Yana was a postdoctoral research associate at the Cavendish Laboratory, University of Cambridge (UK) and an assistant professor at Heidelberg University (Germany) from 2014 to 2019. Yana Vaynzof is the recipient of a number of fellowships and awards, including the ERC Starting Grant, ERC Consolidator Grant, Gordon Wu Fellowship, Henry Kressel Fellowship, Fulbright-Cottrell Award and the Walter Kalkhof-Rose Memorial Prize. She is a Fellow of the Royal Society of Chemistry and the winner of the Energy & Environmental Science Lectureship Award. Her research interests lie in the field of emerging photovoltaics, focusing on the study of material and device physics of organic, quantum dot and perovskite solar cells by integrating device fabrication and characterisation with the application and development of advanced spectroscopic methods.