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DTSTART;TZID=America/Chicago:20260511T150000
DTEND;TZID=America/Chicago:20260511T160000
DTSTAMP:20260415T012706Z
SUMMARY:Northwestern Chemistry Special Seminar: Seokhyoung Kim (Michigan State University)
UID:641468@northwestern.edu
TZID:America/Chicago
DESCRIPTION:Northwestern Chemistry welcomes Professor Seokhyoung Kim from Michigan State University\, hosted by Professor Mercouri Kanatzidis.  Non-Equilibrium Growth of Doped Low-Dimensional Semiconducting Quantum Building Blocks  In the search for new quantum building blocks for future energy and information technologies\, low- dimensional hybrid halide perovskites have gained considerable attention as a versatile and promising class of materials. Over the past several years\, my research group has demonstrated that vapor-phase non-equilibrium growth enables unique chemical control that is inaccessible through solution-based syntheses\, opening access to new materials\, crystal structures\, morphologies\, and associated electronic\, magnetic\, and quantum-optical properties. In this presentation\, I will introduce our recent efforts to develop semiconducting quantum materials using a chemical vapor deposition (CVD) growth platform that provides unusual control over lattice structure\, crystal morphology\, and dopant incorporation. I will discuss how the growth of defect-free single crystals\, combined with the deliberate introduction of metal impurities\, offers a rich playground for exploring emergent magnetic properties in semiconducting perovskites and provides a new way of thinking about doping effects in monocrystalline hybrid 2D materials that have been largely overlooked in prior studies. I will also present photophysical behaviors of two-dimensional vacancy-ordered Cs3Bi2Br9\, in which dopants are introduced into interlayer vacancy sites. These interlayer dopants form bound interlayer excitons\, a unique excited quasiparticle that exhibits bright light emission with radiative lifetimes prolonged by orders of magnitude. I will discuss their detailed structure-property relationships and future prospects for tailoring these materials toward sustainable and energy-efficient information technologies. 
LOCATION:Ford Motor Company Engineering Design Center\, Ford ITW Auditorium Rm 1.350\, 2133 Sheridan Road\, Evanston\, IL 60208
TRANSP:OPAQUE
URL:https://planitpurple.northwestern.edu/event/641468
CREATED:20260407T050000Z
STATUS:CONFIRMED
LAST-MODIFIED:20260407T050000Z
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