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research article
Carrier capture into semiconductor quantum dots via quantum wire barriers: Localization and thermionic emission effects
Carrier transport and capture paths via barriers of different dimensionality in AlGaAs/GaAs quantum wire (QWR)/quantum dot (QD) heterostructures, grown in inverted pyramids, are studied by photoluminescence (PL) spectroscopy. Evidence for thermally activated diffusion related to potential disorder in the QWR barriers and thermionic emission of carriers from the QD into the QWR barrier is observed in temperature dependent PL spectra. Similar activation energies for the thermionic emission are derived from the continuous-wave and time-resolved PL spectroscopy.
Type
research article
Web of Science ID
WOS:000294489300025
Authors
Publication date
2011
Publisher
Published in
Volume
99
Article Number
091910
Peer reviewed
NON-REVIEWED
EPFL units
Available on Infoscience
September 14, 2011
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