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SUMMARY:Organic Single-Crystal Transistors and Interfaces
DTSTART:20120514T131500
DTSTAMP:20260407T183506Z
UID:8f30e39592e8184893e8123182deb9d2636d730c0475da2084718ab9
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Alberto Morpurgo\nThe field of plastic electronics aims 
 at exploiting the unique properties of   organic semiconductors based on
  conjugated molecules and polymers to realize new types of electronic devi
 ces. For this reason\, most research focuses on the study of devices produ
 ced with techniques that are compatible with low-cost mass production. As 
 a result\, the material employed are affected by considerable structural d
 isorder and contain large concentration of chemical impurities that make i
 t virtually impossible to  explore the intrinsic electronic properties of
  organic semiconductors. Therefore\, despite impressive technological prog
 ress\, our physical understanding of these properties has remained limited
 . In this talk\, I will discuss a different approach based on materials of
  the highest possible quality –namely pure single-crystals-  to study t
 he intrinsic electronic transport properties of organic semiconductors usi
 ng field-effect transistors and related devices. These devices have led to
  the clean observation of different physical phenomena\, such as increasin
 g carrier mobility with lowering temperature\, observation of the Hall eff
 ect\, mobility anisotropy\,  and the formation of interfacial polarons in
  transistors with highly polarizable dielectrics. They have also given imp
 ortant insight in the investigation of different important aspects of orga
 nic devices\, e.g. contact resistance\,  the characterization of Schottky
  barriers \, and charge transfer at metal/organic interfaces. The results 
 obtained so far indicate that\, despite the fact that much remains to be u
 nderstood\, devices based on high-quality single molecular crystals enable
  the discrimination of extrinsic effects from the  intrinsic properties o
 f organic semiconductors.
LOCATION:MXF 1 https://plan.epfl.ch/?room==MXF%201
STATUS:CONFIRMED
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