Carrier Multiplication in Graphene

Physics – Condensed Matter – Mesoscale and Nanoscale Physics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Scientific paper

Graphene as a zero-bandgap semiconductor is an ideal model structure to study the carrier relaxation channels, which are inefficient in conventional semiconductors. In particular, it is of fundamental interest to address the question whether Auger-type processes significantly influence the carrier dynamics in graphene. These scattering channels bridge the valence and conduction band allowing carrier multiplication - a process that generates multiple charge carriers from the absorption of a single photon. This has been suggested in literature for improving the efficiency of solar cells. Here we show, based on microscopic calculations within the density matrix formalism, that Auger processes do play an unusually strong role for the relaxation dynamics of photo-excited charge carriers in graphene. We predict that a considerable carrier multiplication takes place, suggesting graphene as a new material for high-efficiency solar cells and for high-sensitivity photodetectors.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Carrier Multiplication in Graphene does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Carrier Multiplication in Graphene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Carrier Multiplication in Graphene will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-480090

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.