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{Wilson:2019:10.1063/1.5079633,
author = {Wilson, JN and Frost, JM and Wallace, SK and Walsh, A},
doi = {10.1063/1.5079633},
journal = {APL Materials},
title = {Dielectric and ferroic properties of metal halide perovskites},
url = {http://dx.doi.org/10.1063/1.5079633},
volume = {7},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Halide perovskite semiconductors and solar cells respond to electric fields in a way that varies across time and length scales. We discuss the microscopic processes that give rise to the macroscopic polarization of these materials, ranging from the optical and vibrational response to the transport of ions and electrons. The strong frequency dependence of the dielectric permittivity can be understood by separating the static dielectric constant into its constituents, including the orientational polarization due to rotating dipoles, which connects theory with experimental observations. The controversial issue of ferroelectricity is addressed, where we highlight recent progress in materials and domain characterization but emphasize the challenge associated with isolating spontaneous lattice polarization from other processes such as charged defect formation and transport. We conclude that CH3NH3PbI3 exhibits many features characteristic of a ferroelastic electret, where a spontaneous lattice strain is coupled to long-lived metastable polarization states.
AU  - Wilson,JN
AU  - Frost,JM
AU  - Wallace,SK
AU  - Walsh,A
DO  - 10.1063/1.5079633
PY  - 2019///
SN  - 2166-532X
TI  - Dielectric and ferroic properties of metal halide perovskites
T2  - APL Materials
UR  - http://dx.doi.org/10.1063/1.5079633
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000457407500001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/68754
VL  - 7
ER  -
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