Imperial College London
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Dr Robert Hoye, FIMMM CEng CSci

Faculty of Engineering, Department of Materials

Honorary Senior Lecturer
 
 
 
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Contact

 

+44 (0)20 7594 6048r.hoye Website

 
 
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Location

 

2.27Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Gonzalez:2020:10.1039/C9NR09622A,
author = {Gonzalez, Rodriguez R and Costa, V and Delport, G and Frohna, K and Hoye, R and Stranks, S and Coffer, J},
doi = {10.1039/C9NR09622A},
journal = {Nanoscale},
pages = {4498--4505},
title = {Structural and spectroscopic studies of a nanostructured silicon – perovskite interface},
url = {http://dx.doi.org/10.1039/C9NR09622A},
volume = {12},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - While extensively investigated in thin film form for energy materials applications, this work investigates the formation of APbBr3 structures (A = CH3NH3+ (MA), Cs+) in silicon and oxidized silicon nanotubes (SiNTs) with varying inner diameter. We carefully control the extent of oxidation of the nanotube host and correlate the relative Si/Si oxide content in a given nanotube host with the photoluminescence quantum efficiency (PLQE) of the perovskite. Complementing these measurements is an evaluation of average PL lifetimes of a given APbBr3 nanostructure, as evaluated by time-resolved confocal photoluminescence measurements. Increasing Si (decreasing oxide) content in the nanotube host results in a sensitive reduction of MAPbBr3 PLQE, with a concomitant decrease in average lifetime (τave). We interpret these observations in terms of decreased defect passivation by a lower concentration of oxide species surrounding the perovskite. In addition, we show that the use of selected nanotube templates leads to more stable perovskite PL in air over time (weeks). Taken in concert, such fundamental observations have implications for interfacial carrier interactions in tandem Si/perovskite photovoltaics.
AU  - Gonzalez,Rodriguez R
AU  - Costa,V
AU  - Delport,G
AU  - Frohna,K
AU  - Hoye,R
AU  - Stranks,S
AU  - Coffer,J
DO  - 10.1039/C9NR09622A
EP  - 4505
PY  - 2020///
SN  - 2040-3364
SP  - 4498
TI  - Structural and spectroscopic studies of a nanostructured silicon – perovskite interface
T2  - Nanoscale
UR  - http://dx.doi.org/10.1039/C9NR09622A
UR  - http://hdl.handle.net/10044/1/77384
VL  - 12
ER  -
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