Theory of Graded-Bandgap Thin-Film Solar Cells

Ahmad, Faiz; Lakhtakia, Akhlesh; Monk, Peter

doi:10.1007/978-3-031-02024-7

Cited by 10 publications

(12 citation statements)

References 135 publications

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“…The CIGS thin-film solar cell has the ARC/AZO/od-ZnO/CdS/CIGS/Al 2 O 3 /Mo structure [4] shown in Fig. 1(a).…”

Section: Optoelectronic Modelingmentioning

confidence: 99%

“…The thicknesses of the remaining layers are as follows: AZO 100 nm, oxygen-deficient ZnO 80 nm, CdS 70 nm, CIGS 2200 nm, Al 2 O 3 20 nm, and Mo 500 nm. A rigorous optoelectronic model [4] was used to determine the effect of antireflection coatings on the power conversion efficiency (η), the short-circuit density (J sc ), the open-circuit voltage (V oc ), and the fill factor (F F ) of the solar cell. These parameters were calculated for normally incident unpolarized solar radiation with AM1.5G spectrum.…”

Section: Optoelectronic Modelingmentioning

confidence: 99%

“…This variable was used as an input to the electrical submodel, wherein the transport of electrons and holes in the od-ZnO/CdS/CIGS region was considered using the 1D drift-diffusion model with the assumption of ideal ohmic front and back contacts. A hybridizable discontinuous Galerkin scheme [4] was used for the drift-diffusion equations. The Shockley-Read-Hall and radiative electron-hole recombination processes [4] were incorporated into the model.…”

Section: Optoelectronic Modelingmentioning

confidence: 99%

“…A hybridizable discontinuous Galerkin scheme [4] was used for the drift-diffusion equations. The Shockley-Read-Hall and radiative electron-hole recombination processes [4] were incorporated into the model. The differential evolution algorithm [6] was used to optimize the efficiency for singlelayer and double-layer antireflection coatings [shown in Fig.…”

Section: Optoelectronic Modelingmentioning

confidence: 99%

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Double-layer antireflection coatings for CIGS thin-film solar cells

Ahmad

Civiletti

Monk

et al. 2023

International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors 2022

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Antireflection coatings are vital for reducing loss due to optical reflection in photovoltaic solar cells. A single-layer magnesium fluoride (MgF2) antireflection coating is usually used in thinfilm CIGS solar cells. According to optics, this coating can be effective only for a narrow spectral regime. Further reduction of reflection loss may require an optimal single-layer or multi-layer coating. Hence, we optimized the refractive indices and thicknesses of single- and double-layer antireflection coatings for CIGS solar cells containing a CIGS absorber layer with: (i) homogeneous bandgap, (ii) linearly graded bandgap, or (iii) nonlinearly graded bandgap. A relative enhancement of up to 1.83% is predicted with an optimal double-layer antireflection coating compared to the efficiency with a single-layer antireflection coating.

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“…The CIGS thin-film solar cell has the ARC/AZO/od-ZnO/CdS/CIGS/Al 2 O 3 /Mo structure [4] shown in Fig. 1(a).…”

Section: Optoelectronic Modelingmentioning

confidence: 99%

Section: Optoelectronic Modelingmentioning

confidence: 99%

Section: Optoelectronic Modelingmentioning

confidence: 99%

Section: Optoelectronic Modelingmentioning

confidence: 99%

See 2 more Smart Citations

Double-layer antireflection coatings for CIGS thin-film solar cells

Ahmad

Civiletti

Monk

et al. 2023

International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors 2022

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“…23 Because experiments on different PVSC geometries can be costly and time-consuming, modeling and simulation can help in understanding the device physics underlying η. 6,[17][18][19][20][24][25][26][27][28][29][30][31] Diverse simulation packages are available to model and study performance parameters of thin-film PVSCs. 32 Most simulation packages use the driftdiffusion equations to simulate charge-carrier transport, 33,34 in which the input is the electronhole pair (EHP) generation rate G. This quantity is obtained from optical calculations that employ either the simple Bouguer-Beer-Lambert law [35][36][37][38] or the rigorous transfer-matrix method.…”

Section: Introductionmentioning

confidence: 99%

Effects of defect density, minority carrier lifetime, doping density, and absorber-layer thickness in CIGS and CZTSSe thin-film solar cells

et al. 2023

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.Detailed optoelectronic simulations of thin-film photovoltaic solar cells (PVSCs) with a homogeneous photon-absorber layer made of with CIGS or CZTSSe were carried out to determine the effects of defect density, minority carrier lifetime, doping density, composition (i.e., bandgap energy), and absorber-layer thickness on solar-cell performance. The transfer-matrix method was used to calculate the electron-hole-pair (EHP) generation rate, and a one-dimensional drift-diffusion model was used to determine the EHP recombination rate, open-circuit voltage, short-circuit current density, power-conversion efficiency, and fill factor. Through a comparison of limited experimental data and simulation results, we formulated expressions for the defect density in terms of the composition parameter of either CIGS or CZTSSe. All performance parameters of the thin-films PVSCs were thereby shown to be obtainable from the bulk material-response parameters of the semiconductor, with the influence of surface defects being small enough to be ignored. Furthermore, unrealistic values of the defect density (equivalently, minority carrier lifetime) will deliver unreliable predictions of the solar-cell performance. The derived expressions should guide fellow researchers in simulating the graded-bandgap and quantum-well-based PVSCs.

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Design and Characterization of a 53.5% Efficient Gallium Indium Phosphide‐Based Optical Photovoltaic Converter under 637 nm Laser Irradiation at 10 W cm⁻²

Sanmartín,

Fernández,

García‐Loureiro

et al. 2024

Solar RRL

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High‐power optical transmission (HPOT) technology has emerged as a promising alternative among far‐field wireless power transmission approaches, enabling the transfer of kilowatts of power over kilometer‐scale distances. Its exceptional adaptability allows operation in challenging scenarios where traditional electrical wiring is impractical or unfeasible, thereby opening up a vast array of potential applications previously considered utopian. An important pending assignment in enhancing the performance of laser‐based HPOT systems is achieving efficient photovoltaic conversion of high power densities (≥10 W cm−2). In this sense, there is a pressing need for the advancement of optical photovoltaic converters (OPCs) capable of enduring intense monochromatic irradiances. This work presents the design optimization, manufacturing, and characterization processes of a gallium indium phosphide (GaInP)‐based OPC under varying 637 nm laser power at room temperature. In addition, methods to evaluate the impact of temperature on performance are provided. The findings reveal a maximum efficiency of 53.5% at 10 W cm−2, surpassing literature results for GaInP converters by over 9%abs at those light intensities. Remarkably, this device withstands unmatched irradiances within GaInP OPCs up to 60 W cm−2, maintaining 42.3% efficiency. This study aims to push forward the development of wide‐bandgap power converters with recordbreaking efficiencies paving the way for new applications.

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Theory of Graded-Bandgap Thin-Film Solar Cells

Cited by 10 publications

References 135 publications

Double-layer antireflection coatings for CIGS thin-film solar cells

Double-layer antireflection coatings for CIGS thin-film solar cells

Effects of defect density, minority carrier lifetime, doping density, and absorber-layer thickness in CIGS and CZTSSe thin-film solar cells

Design and Characterization of a 53.5% Efficient Gallium Indium Phosphide‐Based Optical Photovoltaic Converter under 637 nm Laser Irradiation at 10 W cm⁻²

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Theory of Graded-Bandgap Thin-Film Solar Cells

Cited by 10 publications

References 135 publications

Double-layer antireflection coatings for CIGS thin-film solar cells

Double-layer antireflection coatings for CIGS thin-film solar cells

Effects of defect density, minority carrier lifetime, doping density, and absorber-layer thickness in CIGS and CZTSSe thin-film solar cells

Design and Characterization of a 53.5% Efficient Gallium Indium Phosphide‐Based Optical Photovoltaic Converter under 637 nm Laser Irradiation at 10 W cm−2

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Product

Resources

About

Design and Characterization of a 53.5% Efficient Gallium Indium Phosphide‐Based Optical Photovoltaic Converter under 637 nm Laser Irradiation at 10 W cm⁻²