The Energy Levels Splitting Calculated for Electrons in a Double Cd_1-XZn_xs Quantum Dot

Abstract

Abstract. The present work is aimed to investigate theoretically the electronic properties of a double Cd 1-x Zn x S quantum dot embedded in an insulating material. The quantum dots are assumed to have a flattened cylindrical geometry with a finite barrier at the boundary. This system is studied using the tight binding approximation. The energy levels splitting has been computed, for the electrons, versus the Zn composition and the inter-quantum dot separation as well. An analysis of the results shows that the Zn compositions x = 0.4 and x = 0.6 are appropriate to ensure the best coupling for conduction electrons.

Electro‐photovoltaics of Polymer‐stabilized Copper–Indium Selenide Quantum Dot

“…Among these materials, CuInSe 2 , with a energy bandgap of 1.04 eV in its bulk state and an absorption coefficient that exceeds 3 × 10 4 cm À 1 at wavelengths below 1000 nm has been widely exploited in the construction of low-cost photovoltaic devices [19][20][21]. For example, De Kergommeaux et al [22], prepared CuInSe 2 of low size and shape distribution for implementation in thin-film photovoltaics.…”

The Energy Levels Splitting Calculated for the Heavy and Light Holes in a Cd<sub>1-x</sub>Zn<sub>x</sub>S Double Quantum Dot

“…The comparison with results obtained for electrons [45] shows that the lh E ∆ values are not far from those of electrons (Table 4). …”

“…More precisely, our interest has been focused on the investigation of the energy levels splitting in the case of electrons. This study has evidenced that for intermediate zinc compositions (x = 0.4 -0.6) the coupling between QDs is maximum [45].…”

“…Thus, we have suggested, on another hand, the flattened cylindrical geometry with a finite potential barrier at the boundary [35][36][37][38][39][40][41][42][43][44][45]. Using this model, we have investigated, in a first step, the electronic properties of a single Cd 1-x Zn x S quantum dot [35].…”

A New Investigation of The Electronic Band Parameters for Cd1-xZnxS Quantum Dot Superlattices

“…However, the spherical geometry model is not commode to study the coupling between QDs. In order to around this difficulty, we have recommended the flattened cylindrical geometry with a finite potential model [21][22][23][24][25][26][27][28][29][30][31][32][33]. We have achieved several investigations concerning the electronic band parameters of super lattices based on Cd1-xZnxS quantum dots inserted in a dielectric matrix [23][24][25][26][27][28][29][30].…”