The 6th Physicum seminar takes place on Friday, 17 May 2019 at 14:15 in the Physicum lecture hall B103 (W. Ostwaldi 1, Tartu). The Physicum seminars are meant for a broad auditorium of physicists and materials scientists, as well as for interested people from other natural and exact sciences (including bacheleor level students) and aim at introducing what is important and new in a certain field, or where a specific reasearch direction has reached today. The current seminar will be held in English.
Chemical Physics, Lund University, Sweden
Ultrafast Spectroscopy of Semiconductor Nanostructures
Nano-size semiconductor structures have a rich spectrum of properties related to quantum confinement which are not available in the corresponding bulk materials. Size-tuneable spectrum is, perhaps, the best known and understood such property. Here we investigate dissipation and transport dynamics of various semiconductor nanosystems and their composites which are relevant for optoelectronics applications. We have studied colloidal quantum dots, plasmonic metal nanoparticles, hybrid and all inorganic perovskite nanocrystals and Ruddlesden–Popper 2D perovskites. We apply a set of modern ultrafast techniques like photocurrent and fluorescence detected coherent 2D spectroscopy, transient terahertz and absorption spectroscopies revealing detailed information about photoexcitation dynamics.
Tõnu Pullerits graduated University of Tartu in solid state physics in 1986 and defended PhD in 1991 at the Institute of Physics under the supervision of Arvi Freiberg. He was a postdoctoral researcher at Free University of Amsterdam, University of Umeå, and Lund University, where he works till today. Since 2008 Tõnu Pullerits is a professor of chemical physics at Lund University. Tõnu Pullerits has co-authored over two hundred research publications, which have acquired more than 11000 citations (Google h-index 59). He has supervised six PhD theses. Tõnu Pullerits has been an invited speaker at many international conferences and seminars, he has organized a number of scientific symposia, and is a member of several commissions of trust. As an expert of the field, he has evaluated project proposals for the European Research Council, the Estonian Research council, an for other foundations. He belongs to the editorial board of "Nature Scientific Reports", and acts as a referee for a number of leading journals. In 2016 Tõnu Pullerits became an elected member of the Swedish Royal Academy of Sciences.