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UID:DSC-22809
DTSTART;TZID=Europe/Berlin:20260507T110000
SEQUENCE:1778132313
TRANSP:OPAQUE
DTEND;TZID=Europe/Berlin:20260507T120000
URL:https://www.dresden-science-calendar.de/calendar/en/detail/22809
LOCATION:IFW\, Helmholtzstraße 2001069 Dresden
SUMMARY:Urban: Small Crystals\, Big Physics: What Nanocrystals Teach Us Abo
 ut Halide Perovskites
CLASS:PUBLIC
DESCRIPTION:Speaker: Prof. Dr. Alexander Urban\nInstitute of Speaker:  Ludw
 ig-Maximilians-Universität München (LMU)\nTopics:\n\n Location:\n  Name:
  IFW (D2E.27\, IFW Dresden)\n  Street: Helmholtzstraße 20\n  City: 01069 
 Dresden\n  Phone: \n  Fax: \nDescription: Halide perovskites have transfor
 med solar energy\, but controlling their properties with precision remains
  a central challenge. In this talk\, I will show how we can move beyond tr
 ial-and-error synthesis toward a more predictive and programmable approach
  to perovskite nanocrystals. Using chemistry-aware machine learning\, we e
 stablish a data-efficient framework that enables nanometer-precise control
  over emission wavelength\, linewidth\, and quantum yield—effectively al
 lowing us to “dial in” optical properties on demand. Combined with a m
 echanistic understanding of nanocrystal growth\, this provides a pathway t
 oward reproducible and targeted materials design. But what ultimately dete
 rmines these optical properties? To answer this\, we turn to nanoscale spe
 ctroscopy. By systematically varying nanocrystal size and shape\, we uncov
 er a surprisingly simple picture: light absorption is governed by volume\,
  while carrier recombination and many-body interactions depend sensitively
  on geometry. Pushing further\, new cavity-enhanced techniques allow us to
  directly measure absorption at the level of just a few nanocrystals\, lin
 king structure\, emission\, and absorption within the same nanoscale objec
 t. These insights reveal a unifying perspective: precise synthesis and nan
 oscale physics are not separate challenges\, but two sides of the same pro
 blem. And together they define how we design the next generation of perovs
 kite optoelectronic materials.
DTSTAMP:20260611T222815Z
CREATED:20260410T053822Z
LAST-MODIFIED:20260507T053833Z
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