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Excitons, Disorder, and Nonequilibrium Transport in Semiconductor Nanomaterials

Event Details

Event Dates: 

Friday, December 8, 2017 - 4:00pm

Seminar Location: 

  • JILA Auditorium

Speaker Name(s): 

William Tisdale

Speaker Affiliation(s): 

MIT
Seminar Type/Subject

Scientific Seminar Type: 

  • Phys Chem/Chem Phys Seminar

Event Details & Abstract: 

In nanostructured materials, the short length and time scales over which energy moves can manifest in transport behavior that deviates from classical constitutive laws. Using a combination of ultrafast laser spectroscopy, time-resolved optical microscopy, and kinetic Monte Carlo simulation, I will show how these effects manifest in assemblies of colloidal quantum dots (QD) and atomically thin 2D semiconductors, which are promising components of next-generation photovoltaic and lighting technologies. In particular, I will demonstrate the effect of structural and energetic disorder, the role of dimensionality and surface chemistry, and the self-organization of these nanomaterials into ordered superstructures.