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CATEGORIES:Semiconductor Physics Group Seminars
SUMMARY:Van der Waals heterostructure devices - Dr Freddie
  Withers\, University of Manchester
DTSTART;TZID=Europe/London:20150505T141500
DTEND;TZID=Europe/London:20150505T150000
UID:TALK59338AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/59338
DESCRIPTION:Since the arrival of graphene the range of availab
 le and useful 2D materials has been rapidly growin
 g. We are now able to construct novel and complex 
 heterostructure devices from a variety of individu
 al 2D materials with properties ranging from insul
 ating to superconducting1.   Such Van der Waals he
 terostructures avoid impossible growth conditions\
 , and as our final devices only consist of a few a
 toms in thickness they are therefore bendable maki
 ng them suitable for future flexible and transpare
 nt applications.  In this talk I will introduce th
 e technology involved in the production of heteros
 tructure devices2 and discuss our latest work on q
 uantum well light emitting diodes produced by comb
 ining graphene\, hexagonal boron nitride and vario
 us single layer direct band gap transition metal d
 ichalcogenides3. I will also discuss proof of conc
 ept photovoltaic heterostructure devices construct
 ed from liquid phase exfoliated 2D materials4.\n\n
 References\n1.  A. K. Geim et al.\, Van der Waals 
 heterostructures\, Nature\, 499\, 419-425 (2013)\n
 2.  A. V. kretinin et al.\, Electronic Properties 
 of Graphene Encapsulated with Different Two-Dimens
 ional Atomic Crystals\, Nano Letters\, 14(6)\, 327
 0-3276 (2014)\n3.  F. Withers et al.\, Light-emitt
 ing diodes by band-structure engineering in van de
 r Waals heterostructures\, Nature Materials\, 14\,
  301-306 (2015)\n4.  F. Withers et al.\, Nano Lett
 ers\, 14(7)\, 3987-3992 (2014) \n
LOCATION:Mott Seminar Room (Mott Building Room 531)\, Caven
 dish Laboratory
CONTACT:Teri Bartlett
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