Imperial College London
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ProfessorAronWalsh

Faculty of Engineering, Department of Materials

Chair in Materials Design
 
 
 
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Contact

 

+44 (0)20 7594 1178a.walsh Website

 
 
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Location

 

2.10Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Rigter:2021:10.1002/adfm.202010330,
author = {Rigter, SA and Quinn, XL and Kumar, RE and Fenning, DP and Massonnet, P and Ellis, SR and Heeren, RMA and Svane, KL and Walsh, A and Garnett, EC},
doi = {10.1002/adfm.202010330},
journal = {Advanced Functional Materials},
pages = {1--10},
title = {Passivation properties and formation mechanism of amorphous halide perovskite thin films},
url = {http://dx.doi.org/10.1002/adfm.202010330},
volume = {31},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Lead halide perovskites are among the most exciting classes of optoelectronic materials due to their unique ability to form highquality crystals with tunable bandgaps in the visible and nearinfrared using simple solution precipitation reactions. This facile crystallization is driven by their ionic nature; just as with other salts, it is challenging to form amorphous halide perovskites, particularly in thinfilm form where they can most easily be studied. Here, rapid desolvation promoted by the addition of acetate precursors is shown as a general method for making amorphous lead halide perovskite films with a wide variety of compositions, including those using common organic cations (methylammonium and formamidinium) and anions (bromide and iodide). By controlling the amount of acetate, it is possible to tune from fully crystalline to fully amorphous films, with an interesting intermediate state consisting of crystalline islands embedded in an amorphous matrix. The amorphous lead halide perovskite has a large and tunable optical bandgap. It improves the photoluminescence quantum yield and lifetime of incorporated crystalline perovskite, opening up the intriguing possibility of using amorphous perovskite as a passivating contact, as is currently done in record efficiency silicon solar cells.
AU  - Rigter,SA
AU  - Quinn,XL
AU  - Kumar,RE
AU  - Fenning,DP
AU  - Massonnet,P
AU  - Ellis,SR
AU  - Heeren,RMA
AU  - Svane,KL
AU  - Walsh,A
AU  - Garnett,EC
DO  - 10.1002/adfm.202010330
EP  - 10
PY  - 2021///
SN  - 1616-301X
SP  - 1
TI  - Passivation properties and formation mechanism of amorphous halide perovskite thin films
T2  - Advanced Functional Materials
UR  - http://dx.doi.org/10.1002/adfm.202010330
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000618622100001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://onlinelibrary.wiley.com/doi/10.1002/adfm.202010330
UR  - http://hdl.handle.net/10044/1/87443
VL  - 31
ER  -
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