Imperial College London
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Professor Martyn A McLachlan

Faculty of Engineering, Department of Materials

Professor of Thin Films, Interfaces and Electronic Devices
 
 
 
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Contact

 

+44 (0)20 7594 9692martyn.mclachlan Website

 
 
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Location

 

401 HMolecular Sciences Research HubWhite City Campus

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Summary

 

Publications

Citation

BibTex format

@article{Du:2022:10.1021/acs.nanolett.1c03839,
author = {Du, T and Richheimer, F and Frohna, K and Gasparini, N and Mohan, L and Min, G and Xu, W and Macdonald, TJ and Yuan, H and Ratnasingham, SR and Haque, S and Castro, FA and Durrant, JR and Stranks, SD and Wood, S and McLachlan, MA and Briscoe, J},
doi = {10.1021/acs.nanolett.1c03839},
journal = {Nano Letters: a journal dedicated to nanoscience and nanotechnology},
pages = {979--988},
title = {Overcoming nanoscale inhomogeneities in thin-film perovskites via exceptional post-annealing grain growth for enhanced photodetection},
url = {http://dx.doi.org/10.1021/acs.nanolett.1c03839},
volume = {22},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Antisolvent-assisted spin coating has been widely used for fabricating metal halide perovskite films with smooth and compact morphology. However, localized nanoscale inhomogeneities exist in these films owing to rapid crystallization, undermining their overall optoelectronic performance. Here, we show that by relaxing the requirement for film smoothness, outstanding film quality can be obtained simply through a post-annealing grain growth process without passivation agents. The morphological changes, driven by a vaporized methylammonium chloride (MACl)–dimethylformamide (DMF) solution, lead to comprehensive defect elimination. Our nanoscale characterization visualizes the local defective clusters in the as-deposited film and their elimination following treatment, which couples with the observation of emissive grain boundaries and excellent inter- and intragrain optoelectronic uniformity in the polycrystalline film. Overcoming these performance-limiting inhomogeneities results in the enhancement of the photoresponse to low-light (<0.1 mW cm–2) illumination by up to 40-fold, yielding high-performance photodiodes with superior low-light detection.
AU  - Du,T
AU  - Richheimer,F
AU  - Frohna,K
AU  - Gasparini,N
AU  - Mohan,L
AU  - Min,G
AU  - Xu,W
AU  - Macdonald,TJ
AU  - Yuan,H
AU  - Ratnasingham,SR
AU  - Haque,S
AU  - Castro,FA
AU  - Durrant,JR
AU  - Stranks,SD
AU  - Wood,S
AU  - McLachlan,MA
AU  - Briscoe,J
DO  - 10.1021/acs.nanolett.1c03839
EP  - 988
PY  - 2022///
SN  - 1530-6984
SP  - 979
TI  - Overcoming nanoscale inhomogeneities in thin-film perovskites via exceptional post-annealing grain growth for enhanced photodetection
T2  - Nano Letters: a journal dedicated to nanoscience and nanotechnology
UR  - http://dx.doi.org/10.1021/acs.nanolett.1c03839
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000748018400001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://pubs.acs.org/doi/10.1021/acs.nanolett.1c03839
UR  - http://hdl.handle.net/10044/1/97340
VL  - 22
ER  -
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