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Recombination energy for negatively charged excitons inside type-II core/shell spherical quantum dots
Univ Moulay Ismail, Dept Phys, Fac Sci, LP2MS,Unite Associee CNRST URAC 08, BP 11201, Meknes, Morocco.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory. Univ Moulay Ismail, Dept Phys, Fac Sci, LP2MS,Unite Associee CNRST URAC 08, BP 11201, Meknes, Morocco. (Condensed MatterTheory Group)
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory. Univ Moulay Ismail, Dept Phys, Fac Sci, LP2MS,Unite Associee CNRST URAC 08, BP 11201, Meknes, Morocco;Univ Lorraine, LCP A2MC, F-57000 Metz, France. (Condensed MatterTheory Group)
Univ Lorraine, LCP A2MC, F-57000 Metz, France.
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2018 (English)In: Physica. E, Low-Dimensional systems and nanostructures, ISSN 1386-9477, E-ISSN 1873-1759, Vol. 101, p. 125-130Article in journal (Refereed) Published
Abstract [en]

The recombination energy of isolated neutral exciton and that of isolated negatively charged exciton inside a type-II core/shell spherical quantum dot are studied. Our investigation considers the charge-carriers effective mass discontinuity at the surface contact between the core and shell materials. Although our model omits the effect of the surface polarization, the dielectric-constant mismatch at the nanodot boundaries was taken into account. In order to achieve the exciton and negative trion energies, we proceed by a variational calculation in the framework of the envelope approximation. Our results reveal a strong correlation between the nanodot morphology and the energy spectrum of the neutral and negatively charged exciton.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV , 2018. Vol. 101, p. 125-130
Keywords [en]
Exciton, Trion, Recombination energy, Core/shell materials, Nanostructures, Quantum dots
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-356440DOI: 10.1016/j.physe.2018.03.024ISI: 000432548200017OAI: oai:DiVA.org:uu-356440DiVA, id: diva2:1236086
Funder
Swedish Research Council, 348-2011-7264Available from: 2018-07-31 Created: 2018-07-31 Last updated: 2018-07-31Bibliographically approved

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