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Advanced tunability of optical properties of CdS/ZnSe/ZnTe/CdSe multi-shell quantum dot by the band edge engineering       
Yazarlar
Dr. Öğr. Üyesi Fatih KOÇ
Kırşehir Ahi Evran Üniversitesi, Türkiye
Kavruk Ahmet Emre
Mehmet Sahin
Özet
In this study, the advanced manipulability of wave functions in a type-II multi-shell hetero-nanostructure (MS-HNS) and the tunability of radiative exciton lifetime over a wide range with and/or without changing in transition energies has been demonstrated by the band edge engineering. For this purpose, the electronic and optical properties of exciton (X) and biexciton (XX) in a spherical CdS/ZnSe/ZnTe/CdSe HNS have been explored in detail. In the calculations, effects of all Coulombic interactions between the charges have been taken into account on the wave functions. Moreover, in the case of XX, the exchange-correlation potential between the same charged particles has also been considered. The results have been presented as a function of CdS core radius and ZnSe shell thickness and the probable physical reasons have been discussed in detail.
Anahtar Kelimeler
Multi-shell quantum dot, Exciton transitions, Band edge engineering, Exciton lifetimes
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale
Dergi Adı Elsevier BV
Dergi ISSN 1386-9477
Dergi Tarandığı Indeksler SCI-Expanded
Dergi Grubu Q2
Makale Dili İngilizce
Basım Tarihi 01-2023
Cilt No 145
Doi Numarası 10.1016/j.physe.2022.115479
Makale Linki http://dx.doi.org/10.1016/j.physe.2022.115479