Advanced tunability of optical properties of CdS/ZnSe/ZnTe/CdSe multi-shell quantum dot by the band edge engineering

被引：8

作者：

Koc, Fatih ^{[1
]}

Kavruk, Ahmet Emre ^{[2
]}

Sahin, Mehmet ^{[3
]}

机构：

[1] Ahi Evran Univ, Dept Met & Mat Engn, Kirsehir, Turkiye

[2] Selcuk Univ, Fac Sci, Phys Dept, Konya, Turkiye

[3] Abdullah Gul Univ, Dept Nanotechnol Engn, TR-38080 Kayseri, Turkiye

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2023年 / 145卷

关键词：

Multi-shell quantum dot; Exciton transitions; Band edge engineering; Exciton lifetimes; SINGLE-EXCITON; BIEXCITONS; GENERATION; LAYER; SPINS;

D O I：

10.1016/j.physe.2022.115479

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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.

引用

页数：8

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