First principles investigation of absorption coefficient in quantum well designed for solar cells

Amiri, B.; Belghachi, Abderrahmane

doi:10.1016/j.ijleo.2019.163554

Cited by 4 publications

(2 citation statements)

References 14 publications

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“…Replacing this charge density into Poisson's equation (18), a new Hartree potential φ new (x, y, T ) is obtained that will -again-contribute to the potential energy term in the Schrödinger equation. Then, a new set of eigenfunctions and eigenvalues for the system ψ new i , E new i is obtained.…”

Section: B Razavi Quantum-wirementioning

confidence: 99%

Theoretical Study of Electronic and Optical Properties in Doped Quantum Structures with Razavy Confining Potential: Effects of External Fields

Dakhlaoui¹,

Gil-Corrales²,

Morales³

et al. 2021

Preprint

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We investigate the energy states of confined electrons in doped quantum structures with Razavy-like confining potentials. The theoretical investigation is performed within the effective mass and parabolic band approximations, including the influence of externally applied electric and magnetic fields. First, we analyze the case of a Razavy quantum well and determine its conduction subband spectrum, focusing on the lowest energy levels and their probability densities. These properties have been numerically determined by self-consistently solving the coupled system of Schr\"{o}dinger, Poisson, and charge neutrality equations. Doping is introduced via an on-center $\delta$-like layer. In order to evaluate the associated total (linear plus nonlinear) optical absorption coefficient (TOAC), we have calculated the corresponding diagonal and off-diagonal electric dipole matrix elements, the main energy separation, and the occupancy ratio which are the main factors governing the variation of this optical response. A detailed discussion is given about the influence of doping concentration as well as electric and magnetic fields, which can produce shifts in the light absorption signal, towards either lower or higher frequencies. As an extension of the self-consistent method to a two-dimensional problem, the energy states of quantum wire system of circular cross section, with internal doping and Razavy potential have been calculated. The response of eigenvalues, self-consistent potentials and electron densities is studied with the variation of $\delta$-doping layer width and of the donor density. Finally, the origin of Friedel-like oscillations, that arise in the density profile, generated by the occupation of internal and surface electronic states has been explained.

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Section: B Razavi Quantum-wirementioning

confidence: 99%

Theoretical Study of Electronic and Optical Properties in Doped Quantum Structures with Razavy Confining Potential: Effects of External Fields

Dakhlaoui¹,

Gil-Corrales²,

Morales³

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…The application of a magnetic field provides an additional parabolic confinement that causes further spatial spread in the wave functions so that affecting the dipole matrix elements. The influences of both electric and magnetic fields have been theoretically and experimentally studied by many researchers [11][12][13][14][15][16][17][18][19][20][21]. For instance, Dakhlaoui et al, investigated the effects of magnetic and electric fields on the TOAC [22].…”

Section: Introductionmentioning

confidence: 99%

Theoretical study of electronic and optical properties in doped quantum structures with Razavy confining potential: effects of external fields

et al. 2022

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Computation of the near-infrared electro-absorption in GeSn/SiGeSn step quantum wells

Yahyaoui,

Jellouli,

Baser

et al. 2024

Micro and Nanostructures

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First principles investigation of absorption coefficient in quantum well designed for solar cells

Cited by 4 publications

References 14 publications

Theoretical Study of Electronic and Optical Properties in Doped Quantum Structures with Razavy Confining Potential: Effects of External Fields

Theoretical Study of Electronic and Optical Properties in Doped Quantum Structures with Razavy Confining Potential: Effects of External Fields

Theoretical study of electronic and optical properties in doped quantum structures with Razavy confining potential: effects of external fields

Computation of the near-infrared electro-absorption in GeSn/SiGeSn step quantum wells

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