Colloidal Two-Dimensional Systems: CdSe Quantum Shells and Wells

Colloidal Two-Dimensional Systems: CdSe Quantum Shells and Wells

Thin CdSe layers (“quantum shells”) were epitaxially grown onto CdS nanocrystal templates. Their optical properties are dominated by the shell thickness despite the different bandgap and size of the templates. The emission of the CdSe quantum shells, which can be tuned by varying the shell thickness...

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Veröffentlicht in:Angewandte Chemie International Edition 2003-10, Vol.42 (41), p.5035-5039
Hauptverfasser: Battaglia, David, Li, Jack J., Wang, Yunjun, Peng, Xiaogang
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Sprache:eng
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cadmium
colloids
nanostructures
selenium
semiconductors
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creator Battaglia, David
Li, Jack J.
Wang, Yunjun
Peng, Xiaogang
description Thin CdSe layers (“quantum shells”) were epitaxially grown onto CdS nanocrystal templates. Their optical properties are dominated by the shell thickness despite the different bandgap and size of the templates. The emission of the CdSe quantum shells, which can be tuned by varying the shell thickness, ranges from 520 to 650 nm (see Figure), and the emission quantum yield can be increased to over 40 % by coating the quantum shells with epitaxially grown CdS thin layers (CdSe colloidal “quantum wells”).
doi_str_mv 10.1002/anie.200352120
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subjects cadmium
colloids
nanostructures
selenium
semiconductors
title Colloidal Two-Dimensional Systems: CdSe Quantum Shells and Wells
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