Journal
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
Volume 16, Issue 10, Pages 10788-10791Publisher
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2016.13240
Keywords
Quantum Dots; Quantum Well; Cadmium Telluride; Zinc Telluride; Coupled Structures; Activation Energy
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Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2015R1D1A3A01015595]
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We investigated the optical properties of coupled CdTe quantum dots (QDs) and quantum well (QW) structures with ZnTe separation layers grown on Si substrates. The photoluminescence (PL) intensity of the QDs coupled with a QW increased with decreasing thickness of the ZnTe separation layer. The activation energy of electrons within the coupled structures, which was obtained from temperature-dependent PL spectra, increased with decreasing separation layer thickness. These behaviors were attributed to the tunneling of carriers from the QW to the QDs through a thin separation layer.
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