title: Free charges produced by carrier multiplication in strongly coupled PbSe quantum dot films.
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 (5.7E(g)). 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.
authors.affiliation: Optoeletronic Materials Section, Department of Chemical Engineering, Delft University of Technology , Julianalaan 136, 2628 BL Delft, The Netherlands. M.Aerts@tudelft.nl
authors.forename: Michiel
authors.initials: M
authors.lastname: Aerts
authors.forename: C S
authors.initials: CS
authors.lastname: Suchand Sandeep
authors.forename: Yunan
authors.initials: Y
authors.lastname: Gao
authors.forename: Tom J
authors.initials: TJ
authors.lastname: Savenije
authors.forename: Juleon M
authors.initials: JM
authors.lastname: Schins
authors.forename: Arjan J
authors.initials: AJ
authors.lastname: Houtepen
authors.forename: Sachin
authors.initials: S
authors.lastname: Kinge
authors.forename: Laurens D A
authors.initials: LD
authors.lastname: Siebbeles