High-resolution electron microscopy and microanalysis of ZnSe quantum dots in glass matrices

In this work, the electronic structures of quantum dots (QDs) of nine direct band gap semiconductor materials belonging to the group II-VI and III-V families are investigated, within the empirical tight-binding framework, in the effective bond orbital model. This methodology is shown to accurately describe these systems, yielding, at the same time, qualitative insights into their electronic properties. Various features of the bulk band structure such as band-gaps, band curvature, and band widths around symmetry points affect the quantum confinement of electrons and holes. These effects are identified and quantified. A comparison with experimental data yields good agreement with the calculations. These theoretical results would help quantify the optical response of QDs of these materials and provide useful input for applications.

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“…Other experimental data from the literature such as Leppert et al 80,81 and Chestnoy et al 82 compare rather well with our TB results.…”

Section: Znsesupporting

confidence: 91%

Electron states in semiconductor quantum dots

Dhayal

Ramaniah

Ruda

et al. 2014

The Journal of Chemical Physics

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“…The glass-melt recipe was based largely on a previous work [19]. The glass was annealed at 580 C and exhibited a red-orange color.…”

Section: Methodsmentioning

confidence: 99%

Second harmonic generation and two-photon luminescence upconversion in glasses doped with ZnSe nanocrystalline quantum dots

Thantu¹

2005

Journal of Luminescence

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“…The study of ZnSe QDs was motivated by the inherent interest in quantum confinement systems and the technological application in blue-green and ultraviolet region of the optical spectrum [2]. The ZnSe QDs-doped glasses were fabricated by various methods in the last decade, including sol-gel [3], supersaturated glass solution [4], RF-sputtering [5], pulsed laser deposition [6] and so forth. However, compared to other II-VI semiconductor QDs, such as CdSe, CdS, etc.…”

Section: Introductionmentioning

confidence: 99%