A phonon scattering bottleneck for carrier cooling in lead-chalcogenide nanocrystals

Pieter Geiregat; Christophe Delerue; Yolanda Justo; Michiel Aerts; Frank Spoor; Dries Van Thourhout; Laurens Siebbeles; Guy Allan; A.J. Houtepen; Zeger Hens

doi:10.1557/opl.2015.595

A phonon scattering bottleneck for carrier cooling in lead-chalcogenide nanocrystals

Pieter Geiregat, Christophe Delerue, Yolanda Justo, Michiel Aerts, Frank Spoor, Dries Van Thourhout, Laurens Siebbeles, Guy Allan, A.J. Houtepen, Zeger Hens

ChemE/Opto-electronic Materials

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

3 Citations (Scopus)

Abstract

The cooling dynamics of hot charge carriers in colloidal lead chalcogenide nanocrystals is studied by white light transient absorption spectroscopy. We demonstrate a transient accumulation of charge carriers at a high-energy critical point in the Brillouin zone. Using a theoretical study of the cooling rate in lead chalcogenides, we attribute this slowing down of charge carrier cooling to a phonon scattering bottleneck around this critical point. Our approach allows for the first ever determination of hot carrier cooling rates, relevant in e.g. modeling of multiple exciton generation.

Original language	English
Title of host publication	The Interplay of Structure and Carrier Dynamics in Energy-Relevant Nanomaterials
Publisher	European Materials research Society
Pages	1-5
Number of pages	5
Volume	1787
ISBN (Electronic)	9781510826410
DOIs	https://doi.org/10.1557/opl.2015.595
Publication status	Published - 2015
Event	2015 MRS Spring Meeting - San Francisco, United States Duration: 6 Apr 2015 → 10 Apr 2015

Conference

Conference	2015 MRS Spring Meeting
Country/Territory	United States
City	San Francisco
Period	6/04/15 → 10/04/15

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10.1557/opl.2015.595

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Geiregat, P., Delerue, C., Justo, Y., Aerts, M., Spoor, F., Van Thourhout, D., Siebbeles, L., Allan, G., Houtepen, A. J., & Hens, Z. (2015). A phonon scattering bottleneck for carrier cooling in lead-chalcogenide nanocrystals. In The Interplay of Structure and Carrier Dynamics in Energy-Relevant Nanomaterials (Vol. 1787, pp. 1-5). European Materials research Society. https://doi.org/10.1557/opl.2015.595

@inproceedings{0fbef8e8e4cd49429172594ecba33ec1,

title = "A phonon scattering bottleneck for carrier cooling in lead-chalcogenide nanocrystals",

abstract = "The cooling dynamics of hot charge carriers in colloidal lead chalcogenide nanocrystals is studied by white light transient absorption spectroscopy. We demonstrate a transient accumulation of charge carriers at a high-energy critical point in the Brillouin zone. Using a theoretical study of the cooling rate in lead chalcogenides, we attribute this slowing down of charge carrier cooling to a phonon scattering bottleneck around this critical point. Our approach allows for the first ever determination of hot carrier cooling rates, relevant in e.g. modeling of multiple exciton generation.",

author = "Pieter Geiregat and Christophe Delerue and Yolanda Justo and Michiel Aerts and Frank Spoor and {Van Thourhout}, Dries and Laurens Siebbeles and Guy Allan and A.J. Houtepen and Zeger Hens",

year = "2015",

doi = "10.1557/opl.2015.595",

language = "English",

volume = "1787",

pages = "1--5",

booktitle = "The Interplay of Structure and Carrier Dynamics in Energy-Relevant Nanomaterials",

publisher = "European Materials research Society",

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Geiregat, P, Delerue, C, Justo, Y, Aerts, M, Spoor, F, Van Thourhout, D, Siebbeles, L, Allan, G, Houtepen, AJ & Hens, Z 2015, A phonon scattering bottleneck for carrier cooling in lead-chalcogenide nanocrystals. in The Interplay of Structure and Carrier Dynamics in Energy-Relevant Nanomaterials. vol. 1787, European Materials research Society, pp. 1-5, 2015 MRS Spring Meeting, San Francisco, United States, 6/04/15. https://doi.org/10.1557/opl.2015.595

A phonon scattering bottleneck for carrier cooling in lead-chalcogenide nanocrystals. / Geiregat, Pieter; Delerue, Christophe; Justo, Yolanda et al.
The Interplay of Structure and Carrier Dynamics in Energy-Relevant Nanomaterials. Vol. 1787 European Materials research Society, 2015. p. 1-5.

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

TY - GEN

T1 - A phonon scattering bottleneck for carrier cooling in lead-chalcogenide nanocrystals

AU - Geiregat, Pieter

AU - Delerue, Christophe

AU - Justo, Yolanda

AU - Aerts, Michiel

AU - Spoor, Frank

AU - Van Thourhout, Dries

AU - Siebbeles, Laurens

AU - Allan, Guy

AU - Houtepen, A.J.

AU - Hens, Zeger

PY - 2015

Y1 - 2015

N2 - The cooling dynamics of hot charge carriers in colloidal lead chalcogenide nanocrystals is studied by white light transient absorption spectroscopy. We demonstrate a transient accumulation of charge carriers at a high-energy critical point in the Brillouin zone. Using a theoretical study of the cooling rate in lead chalcogenides, we attribute this slowing down of charge carrier cooling to a phonon scattering bottleneck around this critical point. Our approach allows for the first ever determination of hot carrier cooling rates, relevant in e.g. modeling of multiple exciton generation.

AB - The cooling dynamics of hot charge carriers in colloidal lead chalcogenide nanocrystals is studied by white light transient absorption spectroscopy. We demonstrate a transient accumulation of charge carriers at a high-energy critical point in the Brillouin zone. Using a theoretical study of the cooling rate in lead chalcogenides, we attribute this slowing down of charge carrier cooling to a phonon scattering bottleneck around this critical point. Our approach allows for the first ever determination of hot carrier cooling rates, relevant in e.g. modeling of multiple exciton generation.

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U2 - 10.1557/opl.2015.595

DO - 10.1557/opl.2015.595

M3 - Conference contribution

AN - SCOPUS:84983462987

VL - 1787

SP - 1

EP - 5

BT - The Interplay of Structure and Carrier Dynamics in Energy-Relevant Nanomaterials

PB - European Materials research Society

T2 - 2015 MRS Spring Meeting

Y2 - 6 April 2015 through 10 April 2015

ER -

A phonon scattering bottleneck for carrier cooling in lead-chalcogenide nanocrystals

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