Strongly Scale-Dependent Charge Transport From Interconnections of Silicon Quantum Dots and Nanowires
Date
2017
Authors
Ilday, S.
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Source Title
MRS Communications
Print ISSN
2159-6859
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Publisher
Cambridge University Press
Volume
7
Issue
3
Pages
621 - 625
Language
English
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Abstract
We present the first characterization of strongly scale-dependent charge transport of a unique, hierarchical complex topology: an interconnected random network of silicon quantum dots (QDs) and nanowires. We show that this specific topology has different charge transport characteristics on the nanoscale and the microscale: photogenerated charge carriers tend to be confined inside the QDs and externally injected charge carriers flow preferably along the nanowires. The former enables expression of quantum confinement properties, and the latter mainly contributes to the good electrical conduction on the microscale. Our findings strongly suggest that this multifunctionality can be controlled and used in photovoltaic device applications.
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Keywords
Carrier transport , Charge carriers , Nanocrystals , Nanowires , Quantum chemistry , Topology , Confinement properties , Electrical conduction , Injected charge carriers , Multifunctionality , Photogenerated charge carriers , Photovoltaic devices , Silicon quantum dots , Transport characteristics , Semiconductor quantum dots