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SUMMARY:Highly Efficient Organic Devices
DTSTART:20150302T131500
DTSTAMP:20260407T043630Z
UID:91ce2347d28646b86f77eff73d55e78b6d4808c8e6888d1ccb318b23
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Karl Leo\, Institut für Angewandte Physik\, TU Dresden\
 nBio: Karl Leo studied physics at the Albert-Ludwigs-Universität Freiburg
  and obtained the Diplomphysiker degree with a thesis on solar cells under
  supervision of Adolf Goetzberger at the Fraunhofer-Institut für Solare E
 nergiesysteme. In 1986 he joined the Max-Planck-Institut für Festkörperf
 orschung in Stuttgart for a PhD under the guidance of Hans Queisser. He th
 en joined AT&T Bell Laboratories in Holmdel (New Jersey) as a postdoctoral
  research associate. In 1991 he joined the RWTH Aachen as an assistant pro
 fessor and obtained the Habilitation degree. In 1993 he joined the Technis
 che Universitaet Dresden as a professor of optoelectronics. Since 2002 he 
 has been also with the Fraunhofer-Institut für Photonische Mikrosysteme\,
  currently as director.\nProf. Leo works in the field of semiconductor opt
 ics and the physics of thin organic films. In 1992 he discovered Bloch osc
 illations in a semiconductor superlattice. His work on organic semiconduct
 ors led to Organic Light Emitting Diodes with the highest power efficienci
 es reported and to Organic Solar Cells with leading efficiency values. In 
 2002 he won the Leibniz award\, which is Germany's most prestigious scient
 ific award.\nOrganic semiconductors with conjugated electron system are cu
 rrently intensively\ninvestigated for (opto-) electronic applications. In 
 the first part of this talk\, I will discuss some\nof the recent progress 
 on highly efficient OLED and solar cells. White OLED have achieved\nvery h
 igh efficiencies /2/\, significantly higher than fluorescent tubes\, openi
 ng the path to a\nnew form of high-efficiency area lighting devices. Organ
 ic solar cells have reached 12%\nusing multijunction stacked devices /2/ a
 nd allow excellent transparent devices. Finally\, I will\ndiscuss our rece
 nt work on novel transistor structures: Recently\, we have presented the f
 irst\norganic inversion transistors /3/. Furthermore\, new vertical transi
 stor structures have reached\nparameters which make them suitable even for
  challenging applications.\n/1/ S. Reineke et al.\, Nature 459\, 234 (2009
 ).\n/2/ Heliatek press release\; R. Meerheim et al.\, Appl. Phys. Lett. 10
 5\, 063306 (2014)\n/3/ B. Lüssem et al.\, Nature Comm. 4\, 2775 (2013)
LOCATION:MXF 1 https://plan.epfl.ch/?room==MXF%201
STATUS:CONFIRMED
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