Imperial College London
Alternate

DrPiersBarnes

Faculty of Natural Sciences, Department of Physics

Lecturer in Experimental Solid State Physics
 
 
 
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Contact

 

+44 (0)20 7594 7609piers.barnes

 
 
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Location

 

1003Huxley BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Eames:2015:10.1038/ncomms8497,
author = {Eames, C and Frost, JM and Barnes, PRF and O'Regan, BC and Walsh, A and Islam, MS},
doi = {10.1038/ncomms8497},
journal = {Nature Communications},
title = {Ionic transport in hybrid lead iodide perovskite solar cells},
url = {http://dx.doi.org/10.1038/ncomms8497},
volume = {6},
year = {2015}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Solar cells based on organic–inorganic halide perovskites have recently shown rapidly rising power conversion efficiencies, but exhibit unusual behaviour such as current–voltage hysteresis and a low-frequency giant dielectric response. Ionic transport has been suggested to be an important factor contributing to these effects; however, the chemical origin of this transport and the mobile species are unclear. Here, the activation energies for ionic migration in methylammonium lead iodide (CH3NH3PbI3) are derived from first principles, and are compared with kinetic data extracted from the current–voltage response of a perovskite-based solar cell. We identify the microscopic transport mechanisms, and find facile vacancy-assisted migration of iodide ions with an activation energy of 0.6 eV, in good agreement with the kinetic measurements. The results of this combined computational and experimental study suggest that hybrid halide perovskites are mixed ionic–electronic conductors, a finding that has major implications for solar cell device architectures.
AU  - Eames,C
AU  - Frost,JM
AU  - Barnes,PRF
AU  - O'Regan,BC
AU  - Walsh,A
AU  - Islam,MS
DO  - 10.1038/ncomms8497
PY  - 2015///
SN  - 2041-1723
TI  - Ionic transport in hybrid lead iodide perovskite solar cells
T2  - Nature Communications
UR  - http://dx.doi.org/10.1038/ncomms8497
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000357178300002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/29079
VL  - 6
ER  -
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