Within the effective mass approximation the electronic structure of a GaAs spherical quantum-dot surrounded by one, two and three shells is studied in detail using a numerically stable transfer matrix method. We
Recombination energy for negatively charged excitons inside type-II core/shell spherical quantum dots 2018, Physica E: Low-Dimensional Systems and Nanostructures Citation Excerpt : For this purpose, various works have emphasized the behavior of excitonic trions in QDs. This includes the paper of Xie ...
The binding energy of a shallow hydrogenic impurity in spherical GaAs–Ga1–xAlxAs quantum dots is calculated following a variational and a perturbation method. A finite confining potential well with depth determined by the discontinuity of the band gap in the quantum dot and the em...
Within the effective-mass approximation and by using a variational approach, we introduce a theoretical study of the binding energy, the optical absorption coefficients, and refractive index changes of a donor impurity confined in a GaAs/AlxGa1−xAs coupled double quantum dot system under the infl...
Intrinsic to the spherical quantum shell may be the parabolic potential or the shifted parabolic potential, each superimposed on an infinite spherical square well. Results indicate that the parabolic potential enhances binding energies while the shifted parabolic potential diminishes them. These electric ...
The hydrostatic pressure influence on the binding energy and on the optical properties (linear and third nonlinear) associated to the 1s - 1p intersubband transition of single dopant in a AlAsIGaAs spherical core/shell structure is investigated. The combined effects of the problem variables such as...
The hydrostatic pressure induced band diagram of an InGaAsN/GaAs spherical quantum dot (QD) system is theoretically calculated using an expanded form of standard 8 band k · p Hamiltonian. The band parameters including energy gap, band offsets, and effective masses of electron and hole as a ...
The energy levels and binding energies of a hydrogenic impurity in GaAs spherical quantum dots with radius R are calculated by the finite difference method. The system is assumed to have an infinite confining potential well with radius R, which can be viewed as a hard wall boundary condition. ...
Spherical core-shell Ag NPs with diameter of 100 nm are spread uniformly on graphene by spin coating technique. The diameter distribution of Ag NPs is relative narrow (from 90 nm to 110 nm) as presented Conclusions In conclusion, the Ag NPs enhanced broadband self-powered graphene/...
Spherical quantum dotElectronic structureIntermediate band solar cellIn this work the generation of an intermediate banPhysica, E. Low-dimensional systems & nanostructuresdoi:10.1016/j.physe.2017.01.007Perez-AlvarezBenemeritaR.BenemeritaPernas-Salomon...