Imperial College London
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ProfessorKristelFobelets

Faculty of Engineering, Department of Electrical and Electronic Engineering

Professor of Nanodevices
 
 
 
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Contact

 

+44 (0)20 7594 6236k.fobelets Website CV

 
 
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Assistant

 

Ms Susan Brace +44 (0)20 7594 6215

 
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Location

 

714Electrical EngineeringSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Rahman:2014:48/485202,
author = {Rahman, T and Navarro-Cia, M and Fobelets, K},
doi = {48/485202},
journal = {Nanotechnology},
pages = {1--10},
title = {High density micro-pyramids with silicon nanowire array for photovoltaic applications},
url = {http://dx.doi.org/10.1088/0957-4484/25/48/485202},
volume = {25},
year = {2014}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We use a metal assisted chemical etch process to fabricate silicon nanowire arrays (SiNWAs) onto a dense periodic array of pyramids that are formed using an alkaline etch masked with an oxide layer. The hybrid micro-nano structure acts as an anti-reflective coating with experimental reflectivity below 1% over the visible and near-infrared spectral regions. This represents an improvement of up to 11 and 14 times compared to the pyramid array and SiNWAs on bulk, respectively. In addition to the experimental work, we optically simulate the hybrid structure using a commercial finite difference time domain package. The results of the optical simulations support our experimental work, illustrating a reduced reflectivity in the hybrid structure. The nanowire array increases the absorbed carrier density within the pyramid by providing a guided transition of the refractive index along the light path from air into the silicon. Furthermore, electrical simulations which take into account surface and Auger recombination show an efficiency increase for the hybrid structure of 56% over bulk, 11% over pyramid array and 8.5% over SiNWAs.
AU  - Rahman,T
AU  - Navarro-Cia,M
AU  - Fobelets,K
DO  - 48/485202
EP  - 10
PY  - 2014///
SN  - 0957-4484
SP  - 1
TI  - High density micro-pyramids with silicon nanowire array for photovoltaic applications
T2  - Nanotechnology
UR  - http://dx.doi.org/10.1088/0957-4484/25/48/485202
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000345286400007&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://iopscience.iop.org/article/10.1088/0957-4484/25/48/485202
VL  - 25
ER  -
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