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DTSTAMP:20260623T145144Z
UID:1784278800@ist.ac.at
DTSTART:20260717T110000
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DESCRIPTION:Speaker: Christine Fiedler\nhosted by Edouard Hannezo\nAbstract
 : Thermoelectric materials can directly convert between heat and electrici
 ty\, offering a route toward sustainable energy generation. However\, thei
 r use remains limited to niche applications due to high fabrication costs 
 and relatively low efficiencies compared to competing energy technologies.
  Tin chalcogenides such as SnSe and SnS are promising candidates and\, whe
 n processed via solution-based routes\, provide a scalable and lower-cost 
 alternative to conventional solid-state synthesis\, opening pathways towar
 d broader adoption. However\, realizing their full potential in polycrysta
 lline form requires a deeper understanding of how defects\, dopants\, and 
 microstructure govern charge and heat transport.This thesis demonstrates t
 hat\, in solution-processed materials\, dopants including those introduced
  unintentionally through precursor chemistry\, are not just confined to sp
 ecific lattice sites. Instead\, they distribute across the microstructure\
 , partitioning within grain interiors\, grain boundaries\, and segregated 
 regions\, where they govern grain growth\, carrier concentration\, and cha
 rge transport. Through a systematic study of alkali metals and lead halide
 s in SnSe and SnS\, this work links synthesis\, defect partitioning\, micr
 ostructure evolution\, and thermoelectric performance reshaping how high-p
 erformance p- and n-type thermoelectric materials are designed.
LOCATION:Sunstone Bldg / Ground floor / Big Seminar Room B (I23.EG.102) and
  Zoom\, ISTA
ORGANIZER:
SUMMARY:Christine Fiedler: Thesis Defense: Mechanistic Insight into Solutio
 n-Processed P-type Tin Chalcogenides as a Basis for Designing their N-type
  Analogs
URL:https://talks-calendar.ista.ac.at/events/6530
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