Publications de Thomas Dufaux | EPFL Graph Search

Spatially resolved photocurrents in graphene nanoribbon devices

Klaus Kern, Marko Burghard, Stephan Rauschenbach, Kannan Balasubramanian, Adarsh Singh Sagar, Thomas Dufaux

We present here a scanning photocurrent microscopy study of individual graphene nanoribbons, revealing pronounced photocurrent responses close to the nanoribbon/metal contacts. The magnitude of the corresponding photocurrent signal was found to be directly ...

Amer Inst Physics2013

Nanoscale Organic / Inorganic Hybrid Photovoltaic Devices

Thomas Dufaux

There is an increasing trend of using various types of nanostructures as components of solar cells. This highlights the need to gain a deeper understanding of the nanoscale interface in such devices. The present thesis aims to study individual photoactive ...

EPFL2012

Efficient Charge Extraction out of Nanoscale Schottky Contacts to CdS Nanowires

Klaus Kern, Marko Burghard, Thomas Dufaux

Charge recombination dynamics in semiconductor nanostructures is of vital importance for photovoltaic or photodetector device applications. We use local photocurrent measurements to explore spatially separated drift- and diffusion-currents close to the edg ...

American Chemical Society (ACS)2012

Scanning Tunneling Luminescence of Individual CdSe Nanowires

Klaus Kern, Marko Burghard, Zhe Wang, Theresa Lutz, Alexander Kabakchiev, Thomas Dufaux

The local luminescence properties of individual CdSe nanowires composed of segments of zinc blende and wurtzite crystal structures are investigated by low-temperature scanning tunneling luminescence spectroscopy. Light emission from the wires is achieved b ...

2011

Surface plasmon coupling to nanoscale Schottky-type electrical detectors

Klaus Kern, Marko Burghard, Thomas Dufaux

We have investigated the near-field coupling of surface plasmons to a titanium/CdS nanowire interface for two different device configurations. A bare aluminum grating on an underlying aluminum layer exhibited the expected stronger electrical signal for per ...

AIP American Institute of Physics2010

Photocurrent Distribution in Graphene-CdS Nanowire Devices

Klaus Kern, Marko Burghard, Thomas Dufaux

2010