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Deep Level Transient Spectroscopy in Quantum Dot Characterization

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Author(s): Engström O | Kaniewska M

Journal: Nanoscale Research Letters
ISSN 1931-7573

Volume: 3;
Issue: 5;
Start page: 179;
Date: 2008;
Original page

Keywords: Electron states in low-dimensional structures | Quantum dots | III–V semiconductors | Electrical properties | Deep level transient spectroscopy

ABSTRACT
AbstractDeep level transient spectroscopy (DLTS) for investigating electronic properties of self-assembled InAs/GaAs quantum dots (QDs) is described in an approach, where experimental and theoretical DLTS data are compared in a temperature-voltage representation. From such comparative studies, the main mechanisms of electron escape from QD-related levels in tunneling and more complex thermal processes are discovered. Measurement conditions for proper characterization of the levels by identifying thermal and tunneling processes are discussed in terms of the complexity resulting from the features of self-assembled QDs and multiple paths for electron escape.
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Tango Jona
Tangokurs Rapperswil-Jona