Strongly Scale-Dependent Charge Transport From Interconnections of Silicon Quantum Dots and Nanowires
Author(s)
Date
2017Source Title
MRS Communications
Print ISSN
2159-6859
Publisher
Cambridge University Press
Volume
7
Issue
3
Pages
621 - 625
Language
English
Type
ArticleItem Usage Stats
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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.
Keywords
Carrier transportCharge 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