Imperial College London
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Dr Jarvist Moore Frost

Faculty of Natural Sciences, Department of Chemistry

Royal Society URF (Lecturer)
 
 
 
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Contact

 

jarvist.frost Website

 
 
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Location

 

601FMolecular Sciences Research HubWhite City Campus

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Summary

 

Publications

Citation

BibTex format

@article{Zheng:2021:10.1021/acs.jpclett.1c02102,
author = {Zheng, X and Hopper, TR and Gorodetsky, A and Maimaris, M and Xu, W and Martin, BAA and Frost, JM and Bakulin, AA},
doi = {10.1021/acs.jpclett.1c02102},
journal = {Journal of Physical Chemistry Letters},
pages = {8732--8739},
title = {Multi-pulse terahertz spectroscopy unveils hot polaron photoconductivity dynamics in metal-halide perovskites},
url = {http://dx.doi.org/10.1021/acs.jpclett.1c02102},
volume = {12},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The behavior of hot carriers in metal-halide perovskites (MHPs) present avaluable foundation for understanding the details of carrier-phonon coupling inthe materials as well as the prospective development of highly efficient hotcarrier and carrier multiplication solar cells. Whilst the carrier populationdynamics during cooling have been intensely studied, the evolution of the hotcarrier properties, namely the hot carrier mobility, remain largely unexplored.To address this, we introduce a novel ultrafast visible pump - infrared push -terahertz probe spectroscopy (PPP-THz) to monitor the real-time conductivitydynamics of cooling carriers in methylammonium lead iodide. We find a decreasein mobility upon optically depositing energy into the carriers, which istypical of band-transport. Surprisingly, the conductivity recovery dynamics areincommensurate with the intraband relaxation measured by an analogousexperiment with an infrared probe (PPP- IR), and exhibit a negligibledependence on the density of hot carriers. These results and the kineticmodelling reveal the importance of highly-localized lattice heating on themobility of the hot electronic states. This collective polaron-latticephenomenon may contribute to the unusual photophysics observed in MHPs andshould be accounted for in devices that utilize hot carriers.
AU  - Zheng,X
AU  - Hopper,TR
AU  - Gorodetsky,A
AU  - Maimaris,M
AU  - Xu,W
AU  - Martin,BAA
AU  - Frost,JM
AU  - Bakulin,AA
DO  - 10.1021/acs.jpclett.1c02102
EP  - 8739
PY  - 2021///
SN  - 1948-7185
SP  - 8732
TI  - Multi-pulse terahertz spectroscopy unveils hot polaron photoconductivity dynamics in metal-halide perovskites
T2  - Journal of Physical Chemistry Letters
UR  - http://dx.doi.org/10.1021/acs.jpclett.1c02102
UR  - http://arxiv.org/abs/2106.15967v1
UR  - https://pubs.acs.org/doi/10.1021/acs.jpclett.1c02102
UR  - http://hdl.handle.net/10044/1/91082
VL  - 12
ER  -
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