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SUMMARY:Photonic\, Electronic and Optoelectronic Applications of Sorted Se
 miconducting Carbon Nanotubes - Professor Jana Zaumseil\, Heidelberg Unive
 rsity
DTSTART:20160301T143000Z
DTEND:20160301T153000Z
UID:TALK63279@talks.cam.ac.uk
CONTACT:Stuart Higgins
DESCRIPTION:The selective dispersion of semiconducting carbon nanotubes (s
 -SWNT) by wrapping with conjugated polymers has enabled their application 
 in electronic and optoelectronic devices such as field-effect transistors 
 and light-emitting field-effect transistors. Here\, we show that the dispe
 rsion process can be easily scaled-up while maintaining good photoluminesc
 ence yield (~2%) and nanotube length (>1 µm) to obtain concentrated dispe
 rsions and ultimately thin (<10 nm) or thick films (>100 nm) of s-SWNT wit
 h excellent optical and electrical properties. We demonstrate ambipolar ch
 arge transport with high mobilities and near-infrared light-emission in fi
 eld-effect transistors based on monochiral and mixed networks of s-SWNT. T
 he variation of networks allow us to investigate the influence of the nano
 tube diameter distribution on charge transport within the network dependin
 g on the applied gate voltages and thus charge carrier density. Voltage-de
 pendent photoluminescence and electroluminescence spectra provide insight 
 into the charge carrier distribution among the different nanotubes. Furthe
 rmore\, monochiral s-SWNT films are interesting materials for strong light
 -matter interaction due to their small Stokes shift and large exciton bind
 ing energy\, which allows us to demonstrate exciton-polariton formation in
  suitable cavities and emission enhancement in plasmonic feedback structur
 es.  
LOCATION:Kapitza Building Seminar Room\, Cavendish Laboratory\, Department
  of Physics
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