Study of the Role of Window Layer Al0.8Ga0.2As on GaAs-based Solar Cells Performance

Kamdem, Cedrik Fotcha; Ngoupo, Ariel Teyou; Konan, Fransisco Kouadio; Nkuissi, Hervé Joël Tchognia; Hartiti, Bouchaíb; Ndjaka, J.M.B.

doi:10.17485/ijst/2019/v12i37/147207

Cited by 8 publications

(3 citation statements)

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“…For example, the P max reduces from 31.91 mW/cm 2 to 30.54 mW/cm 2 while conversion efficiency reduces from 23.12% to 22.12% as the window thickness increases from 0.005 to 0.05 µm. This indicates that lower window thickness gives better cell performance, which is attributed to maximize the amount of photon transmitted into the absorber material [9]. From parameter graphs can be found that 0.005 is the optimum thickness for the window.…”

Section: Impact Of Algaas Window Doping and Thicknessmentioning

confidence: 83%

“…The most challenging issue that degrades the GaAs solar cell performance is the surface recombination, which is usually resolved by introducing Aluminum or Indium doped GaAs layers on top, i.e., window layer, and at bottom, i.e., back surface field (BSF) layer, for the cell [8][9]. A literature survey shows that the conversion efficiency for homojunction GaAs varies between 13.75% to 29.75% depending on the cell configuration [3,[6][7][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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2023

JOR

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This research presents a simulation study to achieve an optimized homojunction GaAs solar cell using SILVACO TCAD. A solar cell with configuration of p + -AlGaAs as window, p-GaAs as emitter, n-GaAs as base and n + -AlGaInP as BSF layer is proposed. The AlGaInP is selected as BSF layer due to high bandgap as compared to AlGaAs that is usually used in literature. Large scale of variation for doping concentration and thickness for all layers of cell have been simulated. The results show an improvement for solar cell parameters for the optimized cell as compared with the proposed one, where J sc increases from 40.03 mA/cm 2 to 52.58 mA/cm 2 , V oc slightly increases from 0.94 V to 1 V, P max increases from 30.8 mW/cm 2 to 46.86 mW/cm 2 , FF increases from 82.19% to 88.54% and η increases from 22.29% to 33.94%. Which confirms the effectiveness of the doping concentration and thickness on solar cell performance.

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Section: Impact Of Algaas Window Doping and Thicknessmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Untitled

2023

JOR

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Section: Introductionmentioning

confidence: 99%

Magneto-optic and mechanical properties of TeO2 with K2TeO3 doped with rare earth

Hussein¹,

Al-Qahtani²,

Alzedanie³

et al. 2023

JOR

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The novel glasses within composition: 62TeO2-5K2TeO3-20ZnO-10Nb2O5-3PbF2 and 62TeO2-5K2TeO3-20ZnO-10Nb2O5-3PbF2-2Er2O3 in mol% were fabricated by using meltquenching technique. The magnetic properties Viz; Faraday effect and the Verdet constant at wavelength of laser beam (λ = 632 nm) were measured. The prepared sample with doped Er3+ has the highest value of Verdet constant (= 0.104min/G.cm) which depends on the polarizability of Er3+ ions. Moreover, the optical properties of present glass estimated by using UV-Vis-NIR spectroscopy. The oxygen-packed densities, molar volumes, the polarizability of the oxygen molar volume, the linear refractive index (n), third-order nonlinear susceptibility, (3)  , and nonlinear index (n2) of produced glasses were evaluation. It was found that the linear refractive index decreases otherwise the optical energy gap increased with doped Er3+ ions in the glasses network. Also, the Vickers microhardness increase with increasing Er2O3 in the glass matrix. Hence, these glasses may be use in optical isolator with high third-order non-linear susceptibility.

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