Imperial College London
Alternate

DrArtemBakulin

Faculty of Natural Sciences, Department of Chemistry

Reader in Physical Chemistry
 
 
 
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Location

 

G22aMolecular Sciences Research HubWhite City Campus

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Summary

 

Publications

Citation

BibTex format

@unpublished{Hopper:2019,
author = {Hopper, TR and Jeong, A and Gorodetsky, A and Krieg, F and Bodnarchuk, MI and Huang, X and Lovrincic, R and Kovalenko, MV and Bakulin, AA},
publisher = {arXiv},
title = {Kinetic modelling of carrier cooling in lead halide perovskite materials},
url = {http://arxiv.org/abs/1912.05354v1},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - UNPB
AB  - The relaxation of high-energy "hot" carriers in semiconductors is known toinvolve the redistribution of energy between (i) hot and cold carriers and (ii)hot carriers and phonons. Over the past few years, these two processes havebeen identified in lead-halide perovskites (LHPs) using ultrafast pump-probeexperiments, but the interplay between these processes is not fully understood.Here we present a comprehensive kinetic model to elucidate the individualeffects of the hot and cold carriers in bulk and nanocrystal $CsPbBr_{3}$ filmsobtained from "pump-push-probe" measurements. In accordance with our previouswork, we observe that the cooling dynamics in the materials decelerate as thenumber of hot carriers increases, which we explain through a "hot-phononbottleneck" mechanism. On the other hand, as the number of cold carriersincreases, we observe an acceleration of the cooling kinetics in the samples.We describe the interplay of these opposing effects using our model, and byusing series of natural approximations, reduce this model to a simple formcontaining terms for the carrier-carrier and carrier-phonon interactions. Themodel can be instrumental for evaluating the details of carrier cooling andelectron-phonon couplings in a broad range of LHP optoelectronic materials.
AU  - Hopper,TR
AU  - Jeong,A
AU  - Gorodetsky,A
AU  - Krieg,F
AU  - Bodnarchuk,MI
AU  - Huang,X
AU  - Lovrincic,R
AU  - Kovalenko,MV
AU  - Bakulin,AA
PB  - arXiv
PY  - 2019///
TI  - Kinetic modelling of carrier cooling in lead halide perovskite materials
UR  - http://arxiv.org/abs/1912.05354v1
UR  - https://arxiv.org/abs/1912.05354v1
UR  - http://hdl.handle.net/10044/1/75790
ER  -
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