Effect of elemental composition and size on electron confinement in self-assembled SiC quantum dots : a combinatorial approach
Das Arulsamy, A., Rider, A.E., Cheng, Q.J., Xu, S., & Ostrikov, K. (2009) Effect of elemental composition and size on electron confinement in self-assembled SiC quantum dots : a combinatorial approach. Journal of Applied Physics, 105(9), 094314-1.
A high level of control over quantum dot (QD) properties such as size and composition during fabrication is required to precisely tune the eventual electronic properties of the QD. Nanoscale synthesis efforts and theoretical studies of electronic properties are traditionally treated quite separately. In this paper, a combinatorial approach has been taken to relate the process synthesis parameters and the electron confinement properties of the QDs. First, hybrid numerical calculations with different influx parameters for Si1-x Cx QDs were carried out to simulate the changes in carbon content x and size. Second, the ionization energy theory was applied to understand the electronic properties of Si1-x Cx QDs. Third, stoichiometric (x=0.5) silicon carbide QDs were grown by means of inductively coupled plasma-assisted rf magnetron sputtering. Finally, the effect of QD size and elemental composition were then incorporated in the ionization energy theory to explain the evolution of the Si1-x Cx photoluminescence spectra. These results are important for the development of deterministic synthesis approaches of self-assembled nanoscale quantum confinement structures.
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|Item Type:||Journal Article|
|Divisions:||Current > QUT Faculties and Divisions > Science & Engineering Faculty|
|Copyright Owner:||Copyright 2009 American Institute of Physics|
|Deposited On:||15 Jul 2014 03:30|
|Last Modified:||16 Jul 2014 02:11|
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