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SUMMARY:Van der Waals heterostructure devices - Dr Freddie Withers\, Unive
 rsity of Manchester
DTSTART:20150505T131500Z
DTEND:20150505T140000Z
UID:TALK59338@talks.cam.ac.uk
CONTACT:Teri Bartlett
DESCRIPTION:Since the arrival of graphene the range of available and usefu
 l 2D materials has been rapidly growing. We are now able to construct nove
 l and complex heterostructure devices from a variety of individual 2D mate
 rials with properties ranging from insulating to superconducting1.   Such 
 Van der Waals heterostructures avoid impossible growth conditions\, and as
  our final devices only consist of a few atoms in thickness they are there
 fore bendable making them suitable for future flexible and transparent app
 lications.  In this talk I will introduce the technology involved in the p
 roduction of heterostructure devices2 and discuss our latest work on quant
 um well light emitting diodes produced by combining graphene\, hexagonal b
 oron nitride and various single layer direct band gap transition metal dic
 halcogenides3. I will also discuss proof of concept photovoltaic heterostr
 ucture devices constructed from liquid phase exfoliated 2D materials4.\n\n
 References\n1.  A. K. Geim et al.\, Van der Waals heterostructures\, Natur
 e\, 499\, 419-425 (2013)\n2.  A. V. kretinin et al.\, Electronic Propertie
 s of Graphene Encapsulated with Different Two-Dimensional Atomic Crystals\
 , Nano Letters\, 14(6)\, 3270-3276 (2014)\n3.  F. Withers et al.\, Light-e
 mitting diodes by band-structure engineering in van der Waals heterostruct
 ures\, Nature Materials\, 14\, 301-306 (2015)\n4.  F. Withers et al.\, Nan
 o Letters\, 14(7)\, 3987-3992 (2014) \n
LOCATION:Mott Seminar Room (Mott Building Room 531)\, Cavendish Laboratory
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