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Light-emitting diodes by bandstructure engineering in van der Waals heterostructures

Speaker: 
K. S. Novoselov (University of Manchester, UK)
Date: 
Wed, 28/10/2015 - 2:00pm to 3:00pm
Location: 
LT27 (Science Faculty)
Host: 
Antonio H. Castro Neto
Event Type: 
Seminars

Abstract

The advent of graphene and related 2D materials has recently led to a new technology: heterostructures based on these atomically thin crystals. The paradigm proved itself extremely versatile and led to rapid demonstration of tunnelling diodes with negative differential resistance, tunnelling transistors, photovoltaic devices, etc. By taking the complexity and functionality of such van der Waals heterostructures to the next level we introduce quantum wells engineered with one atomic plane precision. We describe light emitting diodes made by stacking up metallic graphene, insulating BN and various semiconducting monolayers into complex but carefully designed sequences. By preparing the heterostructures on elastic and transparent substrates, we show that they can also provide the basis for flexible and semi-transparent electronics. The range of functionalities for the demonstrated heterostructures is expected to grow further with increasing the number of available 2D crystals and improving their electronic quality.

The speaker

Prof Sir Konstantin Novoselov FRS is best known for isolating graphene at The University of Manchester in 2004, and was awarded the Nobel Prize for Physics in 2010 for his achievements with graphene. Kostya holds positions of Langworthy Professor of Physics and the Royal Society Research Professor at The University of Manchester.

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