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{Petrus:2016:10.1002/cssc.201600999,
author = {Petrus, ML and Hu, Y and Moia, D and Calado, P and Leguy, AMA and Barnes, PRF and Docampo, P},
doi = {10.1002/cssc.201600999},
journal = {Chemsuschem},
pages = {2699--2707},
title = {The Influence of Water Vapor on the Stability and Processing of Hybrid Perovskite Solar Cells Made from Non-Stoichiometric Precursor Mixtures},
url = {http://dx.doi.org/10.1002/cssc.201600999},
volume = {9},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We investigated the influence of moisture on methylammonium lead iodide perovskite (MAPbI3) films and solar cells derived from non-stoichiometric precursor mixtures. We followed both the structural changes under controlled air humidity through insitu X-ray diffraction, and the electronic behavior of devices prepared from these films. A small PbI2 excess in the films improved the stability of the perovskite compared to stoichiometric samples. We assign this to excess PbI2 layers at the perovskite grain boundaries or to the termination of the perovskite crystals with Pb and I. In contrast, the MAI-excess films composed of smaller perovskite crystals showed increased electronic disorder and reduced device performance owing to poor charge collection. Upon exposure to moisture followed by dehydration (so-called solvent annealing), these films recrystallized to form larger, highly oriented crystals with fewer electronic defects and a remarkable improvement in photocurrent and photovoltaic efficiency.
AU  - Petrus,ML
AU  - Hu,Y
AU  - Moia,D
AU  - Calado,P
AU  - Leguy,AMA
AU  - Barnes,PRF
AU  - Docampo,P
DO  - 10.1002/cssc.201600999
EP  - 2707
PY  - 2016///
SN  - 1864-564X
SP  - 2699
TI  - The Influence of Water Vapor on the Stability and Processing of Hybrid Perovskite Solar Cells Made from Non-Stoichiometric Precursor Mixtures
T2  - Chemsuschem
UR  - http://dx.doi.org/10.1002/cssc.201600999
UR  - http://hdl.handle.net/10044/1/42391
VL  - 9
ER  -
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