Control of the binding energy by tuning the single dopant position, magnetic field strength and shell thickness in ZnS/CdSe core/shell quantum dot

Talbi, A.; Feddi, E.; Zouitine, A.; Haouari, Mohamed; Zazoui, M.; Oukerroum, A.; Dujardin, F.; Assaid, E.; Addou, M.

doi:10.1016/j.physe.2016.06.028

Cited by 23 publications

(2 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The solutions of three-dimensional Schrödinger equation for the ground state energy are obtained by considering the boundary conditions given by Ben-Daniel-Duke [ 37 , 38 ]:

…”

Section: Theoretical Background and Mathematical Modelingmentioning

confidence: 99%

Influence of Geometrical Shape on the Characteristics of the Multiple InN/InxGa1−xN Quantum Dot Solar Cells

et al. 2021

View full text Add to dashboard Cite

Solar cells that are based on the implementation of quantum dots in the intrinsic region, so-called intermediate band solar cells (IBSCs), are among the most widely used concepts nowadays for achieving high solar conversion efficiency. The principal characteristics of such solar cells relate to their ability to absorb low energy photons to excite electrons through the intermediate band, allowing for conversion efficiency exceeding the limit of Shockley–Queisser. IBSCs are generating considerable interest in terms of performance and environmental friendliness. However, there is still a need for optimizing many parameters that are related to the solar cells, such as the size of quantum dots, their shape, the inter-dot distance, and choosing the right material. To date, most studies have only focused on studying IBSC composed of cubic shape of quantum dots. The main objective of this study is to extend the current knowledge of IBSC. Thus, we analyze the effect of the shape of the quantum dot on the electronic and photonic characteristics of indium nitride and indium gallium nitride multiple quantum dot solar cells structure considering cubic, spherical, and cylindrical quantum dot shapes. The ground state of electrons and holes energy levels in quantum dot are theoretically determined by considering the Schrödinger equation within the effective mass approximation. Thus, the inter and intra band transitions are determined for different dot sizes and different inter dot spacing. Consequently, current–voltage (J-V) characteristic and efficiencies of these devices are evaluated and compared for different shapes. Our calculations show that, under fully concentrated light, for the same volume of different quantum dots (QD) shapes and a well determined In-concentration, the maximum of the photovoltaic conversion efficiencies reaches 63.04%, 62.88%, and 62.43% for cubic, cylindrical, and spherical quantum dot shapes, respectively.

show abstract

“…The solutions of three-dimensional Schrödinger equation for the ground state energy are obtained by considering the boundary conditions given by Ben-Daniel-Duke [ 37 , 38 ]:

…”

Section: Theoretical Background and Mathematical Modelingmentioning

confidence: 99%

Influence of Geometrical Shape on the Characteristics of the Multiple InN/InxGa1−xN Quantum Dot Solar Cells

et al. 2021

View full text Add to dashboard Cite

show abstract

“…22 The effect of a magnetic field on the charged particles in a core/shell nanostructured dot has been investigated, revealing that the binding energy is influenced by the magnetic field and the dimensions of the core/shell material. [23][24][25] In the present work, the excitonic properties and optoelectronic properties of InP/ZnS core/shell nanoheterostructured dots are studied under the influence of the spatial confinement effect and the magnetic field strength. The exciton binding energy, oscillator strength, absorption coefficient, electronic dipole moment, and optical gain are found to depend on the ratio of the core/shell dot radii in the presence of a magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Field Dependence of Excitonic and Optical Properties of InP/ZnS Core/Shell Nanostructure

Peter¹,

Elamathi²,

Lee

2020

Journal of Elec Materi

View full text Add to dashboard Cite

The effect of a magnetic field on the excitonic and optical properties of an InP/ ZnS core/shell nanodot (type I) including the influence of the geometrical confinement effect has been investigated. The exciton binding energy, oscillator strength, linear and nonlinear electronic and optical absorption coefficients, electronic dipole moment, and optical gain are studied for different ratios of the core/shell dot radii with and without the application of a magnetic field. The variational formalism is employed to obtain the electronic properties, whereas a compact density matrix method is applied to determine the optical properties. It is observed that the exciton binding energy is enhanced as the core/shell ratio tends to unity, attempting to reach its well-known twodimensional (2D) limit. The application of a magnetic field shifts the peak to higher energies. The combined effects of a magnetic field and spatial confinement lead to control over the electronic as well as optical properties. These results will be useful for enhancing the performance of such structures for any desired potential application in optical devices.

show abstract

Electronic state and photoionization cross section of a single dopant in GaN/InGaN core/shell quantum dot under magnetic field and hydrostatic pressure

et al. 2018

View full text Add to dashboard Cite

Control of the binding energy by tuning the single dopant position, magnetic field strength and shell thickness in ZnS/CdSe core/shell quantum dot

Cited by 23 publications

References 39 publications

Influence of Geometrical Shape on the Characteristics of the Multiple InN/InxGa1−xN Quantum Dot Solar Cells

Influence of Geometrical Shape on the Characteristics of the Multiple InN/InxGa1−xN Quantum Dot Solar Cells

Magnetic Field Dependence of Excitonic and Optical Properties of InP/ZnS Core/Shell Nanostructure

Electronic state and photoionization cross section of a single dopant in GaN/InGaN core/shell quantum dot under magnetic field and hydrostatic pressure

Contact Info

Product

Resources

About