Carrier Multiplication in Nanocrystals via Photostimulated Generation of Biexcitons from Vacuum

Details Carrier Multiplication in Nanocrystals via Photostimulated Generation of Biexcitons from Vacuum Carrier Multiplication in Nanocrystals via Photostimulated Generation of Biexcitons from Vacuum

2007-07-13

arxiv.org/abs/0707.2112v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

15 pages, 3 figures

Scientific paper

We propose a novel mechanism for photogeneration of multiexcitons by single photons (carrier multiplication) in semiconductor nanocrystals. In this mechanism, the Coulomb interaction between two valence-band electrons involving their transfer to the conduction band creates a virtual biexciton from vacuum that is then converted into a real biexciton by photon absorption on an intraband optical transition. This mechanism is inactive in bulk semiconductors as momentum conservation suppresses intraband absorption. However, it becomes highly efficient in zero-dimensional nanocrystals and can provide a significant contribution to carrier multiplication in these materials.

Affiliated with

Also associated with

No associations

Rating

Carrier Multiplication in Nanocrystals via Photostimulated Generation of Biexcitons from Vacuum 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 Nanocrystals via Photostimulated Generation of Biexcitons from Vacuum, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Carrier Multiplication in Nanocrystals via Photostimulated Generation of Biexcitons from Vacuum will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-253868