Free charges produced by carrier multiplication in strongly coupled pbse quantum dot films

Michiel Aerts; C. S. Suchand Sandeep; Yunan Gao; Tom J. Savenije; Juleon M. Schins; Arjan J. Houtepen; Sachin Kinge; Laurens D.A. Siebbeles

doi:10.1021/nl202915p

Free charges produced by carrier multiplication in strongly coupled pbse quantum dot films

Michiel Aerts^*, C. S. Suchand Sandeep, Yunan Gao, Tom J. Savenije, Juleon M. Schins, Arjan J. Houtepen, Sachin Kinge, Laurens D.A. Siebbeles

^*Corresponding author for this work

Department of Physics, Manipal Institute of Technology, Manipal

Research output: Contribution to journal › Article › peer-review

41 Citations (Scopus)

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.

Original language	English
Pages (from-to)	4485-4489
Number of pages	5
Journal	Nano Letters
Volume	11
Issue number	10
DOIs	https://doi.org/10.1021/nl202915p
Publication status	Published - 12-10-2011

All Science Journal Classification (ASJC) codes

Bioengineering
General Chemistry
General Materials Science
Condensed Matter Physics
Mechanical Engineering

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10.1021/nl202915p

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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 (5.7Eg). 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.",

author = "Michiel Aerts and \{Suchand Sandeep\}, \{C. S.\} and Yunan Gao and Savenije, \{Tom J.\} and Schins, \{Juleon M.\} and Houtepen, \{Arjan J.\} and Sachin Kinge and Siebbeles, \{Laurens D.A.\}",

year = "2011",

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doi = "10.1021/nl202915p",

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T1 - Free charges produced by carrier multiplication in strongly coupled pbse quantum dot films

AU - Aerts, Michiel

AU - Suchand Sandeep, C. S.

AU - Gao, Yunan

AU - Savenije, Tom J.

AU - Schins, Juleon M.

AU - Houtepen, Arjan J.

AU - Kinge, Sachin

AU - Siebbeles, Laurens D.A.

PY - 2011/10/12

Y1 - 2011/10/12

N2 - 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.

AB - 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.

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VL - 11

SP - 4485

EP - 4489

JO - Nano Letters

JF - Nano Letters

IS - 10

ER -

Free charges produced by carrier multiplication in strongly coupled pbse quantum dot films

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