Imperial College London
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DrThomasMacdonald

Faculty of Natural Sciences, Department of Chemistry

Visiting Reseacher
 
 
 
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t.macdonald

 
 
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Location

 

Molecular Sciences Research HubWhite City Campus

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Summary

 

Publications

Citation

BibTex format

@article{Hopper:2020:10.1021/acs.nanolett.9b04491,
author = {Hopper, TR and Gorodetsky, A and Jeong, A and Krieg, F and Bodnarchuk, MI and Maimaris, M and Chaplain, M and Macdonald, TJ and Huang, X and Lovrincic, R and Kovalenko, MV and Bakulin, AA},
doi = {10.1021/acs.nanolett.9b04491},
journal = {Nano Letters},
pages = {2271--2278},
title = {Hot carrier dynamics in perovskite nanocrystal solids: role of the cold carriers, nanoconfinement and the surface},
url = {http://dx.doi.org/10.1021/acs.nanolett.9b04491},
volume = {20},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Carrier cooling is of widespread interest in the field of semiconductor science. It is linked to carrier-carrier and carrier-phonon coupling, and has profound implications for the photovoltaic performance of materials. Recent transient optical studies have shown that a high carrier density in lead-halide perovskites (LHPs) can reduce the cooling rate through a “phonon bottleneck”. However, the role of carrier-carrier interactions, and the material properties that control cooling in LHPs, are still disputed. To address these factors, we utilize ultrafast “pump-push-probe” spectroscopy on LHP nanocrystal (NC) films. We find that the addition of cold carriers to LHP NCs increases the cooling rate, competing with the phonon bottleneck. By comparing different NCs and bulk samples, we deduce that the cooling behavior is intrinsic to the LHP composition, and independent of the NC size or surface. This can be contrasted with other colloidal nanomaterials, where confinement and trapping considerably influence the cooling dynamics.
AU  - Hopper,TR
AU  - Gorodetsky,A
AU  - Jeong,A
AU  - Krieg,F
AU  - Bodnarchuk,MI
AU  - Maimaris,M
AU  - Chaplain,M
AU  - Macdonald,TJ
AU  - Huang,X
AU  - Lovrincic,R
AU  - Kovalenko,MV
AU  - Bakulin,AA
DO  - 10.1021/acs.nanolett.9b04491
EP  - 2278
PY  - 2020///
SN  - 1530-6984
SP  - 2271
TI  - Hot carrier dynamics in perovskite nanocrystal solids: role of the cold carriers, nanoconfinement and the surface
T2  - Nano Letters
UR  - http://dx.doi.org/10.1021/acs.nanolett.9b04491
UR  - https://pubs.acs.org/doi/10.1021/acs.nanolett.9b04491
UR  - http://hdl.handle.net/10044/1/77247
VL  - 20
ER  -
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