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Issue 49, 2019
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Size engineering optoelectronic features of C, Si and CSi hybrid diamond-shaped quantum dots

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Abstract

Based on the density functional theory and many-body ab initio calculations, we investigate the optoelectronic properties of diamond-shaped quantum dots based graphene, silicene and graphene–silicene hybrid. The HOMO–LUMO (H–L) energy gap, the exciton binding energy, the singlet–triplet energy splitting and the electron–hole overlap are all determined and discussed. Smaller nanostructures show high chemical stability and strong quantum confinement resulting in a significant increase in H–L gap and exciton binding energy. On the other hand, the larger configurations are reactive which implies characteristics favorable to possible electronic transport and conductivity. In addition, the typically strong splitting between singlet and triplet excitonic states and the big electron–hole overlap make these QDs emergent systems for nanomedicine applications.

Graphical abstract: Size engineering optoelectronic features of C, Si and CSi hybrid diamond-shaped quantum dots

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Publication details

The article was received on 27 May 2019, accepted on 25 Aug 2019 and first published on 11 Sep 2019


Article type: Paper
DOI: 10.1039/C9RA04001C
RSC Adv., 2019,9, 28609-28617
  • Open access: Creative Commons BY-NC license
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    Size engineering optoelectronic features of C, Si and CSi hybrid diamond-shaped quantum dots

    H. Ouarrad, F.-Z. Ramadan and L. B. Drissi, RSC Adv., 2019, 9, 28609
    DOI: 10.1039/C9RA04001C

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