ADEM Publications, Presentations and other output

ADEM--14-063

Title:

Free Charges Produced by Carrier Multiplication in Strongly Coupled PbSe Quantum Dot Films

Author(s)

Aerts, Michiel;

Identification

ISBN

DOI

10.1021/nl202915p

Publication date

2011-09-22

Number of pages

5

Full text

not available

Abstract

We show that in films of strongly coupled PbSe quantum dots multiple electron–hole pairs can be efficiently produced by absorption of a single photon (carrier multiplication). Moreover, in these films carrier multiplication leads to the generation of free, highly mobile charge carriers rather than excitons. Using the time-resolved microwave conductivity technique, we observed the production of more than three electron–hole pairs upon absorption of a single highly energetic photon (5.7Eg). Free charge carriers produced via carrier multiplication are readily available for use in optoelectronic devices even without employing any complex donor/acceptor architecture or electric fields.