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DTSTART:20190331T030000
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DTSTART:20181028T020000
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DTSTAMP:20260405T191549Z
UID:5bea8978c8b2d114512625@ist.ac.at
DTSTART:20181214T110000
DTEND:20181214T120000
DESCRIPTION:Speaker: Nuri Yazdani\nhosted by Maria Ibanez\nAbstract: Due to
  the discrete and tunable electronic structure of nanocrystals (NCs) and t
 heir facile assembly into conductive ordered superlattices (NC-solids)\, N
 Cs are often referred to as artificial atoms. Through engineering of the c
 onstituent NCs and the topology of their assembly in NC-solids\, it is pos
 sible to create designer semiconductors with tunable band gaps\, mobilitie
 s\, carrier densities\, and thermal conductivities\; properties which can 
 be optimised for a given application\, e.g. thermoelectric generators\, so
 lar cells\, lasers\, LEDs\, and photodetectors. Extrapolating the artifici
 al atom analogy of NCs to the vibrational density of states of NC-solids\,
  one can expect to find inter-NC vibrational excitations of the superlatti
 ce\, analogous to acoustic phonons of an atomic lattice. Through character
 izing and modelling of these excitations via inelastic neutron scattering 
 and a variety of ab-initio and computational methods\, I will show how the
  characteristic energy scale of these excitations\, and therefore the ther
 mal conductivity of a NC-solid\, can be engineered through the constituent
  NC size and choice of ligand. I will then present a brief overview of our
  studies on charge transport in NC-solids\, and discuss how our improved u
 nderstanding of thermal and charge transport can be leveraged towards the 
 rational design of NC-solid superlattices for thin-film thermoelectrics.
LOCATION:Big Seminar room Ground floor / Office Bldg West (I21.EG.101)\, IS
 TA
ORGANIZER:swheatle@ist.ac.at
SUMMARY:Nuri Yazdani: Thermal and Charge Transport in Nanocrystal Solids
URL:https://talks-calendar.ista.ac.at/events/1604
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