Simulating the dispersive behavior of semiconductors using the Lorentzian–Drude model for photovoltaic devices

Abdellatif, Sameh O.; Ghannam, Rami; Khalil, Ahmed S. G.

doi:10.1364/ao.53.003294

Cited by 21 publications

(12 citation statements)

References 15 publications

(24 reference statements)

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“…The dispersive and absorption capabilities of various used materials should be modeled and embedded in MEEP. Herein, we used our previously developed model to estimate the complex refractive indices for different materials with specific emphasis on semiconductors using the Lorentzian-Drude (LD) coefficients [21]. The LD model is chosen due to its compatibility with FDTD simulations [27,29].…”

Section: Meep (An Acronym For Massachusetts Institute For Technology mentioning

confidence: 99%

“…The LD model is chosen due to its compatibility with FDTD simulations [27,29]. For the proposed structure, the LD coefficients for a-Si are calculated using the same approach in [21] and are listed in Table 1. The fitting process of the material is made by comparison with our experimentally measured data, as shown in Fig.…”

Section: Meep (An Acronym For Massachusetts Institute For Technology mentioning

confidence: 99%

“…Three-dimensional Maxwell's equation solvers are used to analyze and optimize such periodic structures when embedded in solar cells [7,19,21]. In both random and periodic cases, optoelectronic modeling was employed to assess the spectral response, to evaluate optical losses, and to simulate the current density-voltage characteristic [22].…”

Section: Introductionmentioning

confidence: 99%

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Enhancing the absorption capabilities of thin-film solar cells using sandwiched light trapping structures

et al. 2015

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A novel structure for thin-film solar cells is simulated with the purpose of maximizing the absorption of light in the active layer and of reducing the parasitic absorption in other layers. In the proposed structure, the active layer is formed from an amorphous silicon thin film sandwiched between silicon nanowires from above and photonic crystal structures from below. The upper electrical contact consists of an indium tin oxide layer, which serves also as an antireflection coating. A metal backreflector works additionally as the other contact. The simulation was done using a new reliable, efficient and generic optoelectronic approach. The suggested multiscale simulation model integrates the finite-difference time-domain algorithm used in solving Maxwell's equation in three dimensions with a commercial simulation platform based on the finite element method for carrier transport modeling. The absorption profile, the external quantum efficient, and the power conversion efficiency of the suggested solar cell are calculated. A noticeable enhancement is found in all the characteristics of the novel structure with an estimated 32% increase in the total conversion efficiency over a cell without any light trapping mechanisms.

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Section: Meep (An Acronym For Massachusetts Institute For Technology mentioning

confidence: 99%

Section: Meep (An Acronym For Massachusetts Institute For Technology mentioning

confidence: 99%

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Enhancing the absorption capabilities of thin-film solar cells using sandwiched light trapping structures

et al. 2015

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“…for calculating the parameters of the porous system applying the simple mixing rule given in equation (4). A Lorentz-Drude (LD) fitting model as developed in [35] was applied to the background material (TiO 2 ) , allowing easy data handling in future DSSC simulations. Figure 8a shows the achieved result…”

Section: Dispersion and Absorption Of The Compact Tiomentioning

confidence: 99%

Refractive index and scattering of porous TiO 2 films

Abdellatif

Sharifi

Kirah

et al. 2018

Microporous and Mesoporous Materials

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Porous titanium dioxide (TiO 2) films are essential components of dye sensitized solar cells (DSSCs) as well as perovskite solar cells (PSCs). Unfortunately, porosity, refractive index, and scattering properties of these films are only roughly known. This induces uncertainties in modelling and understanding of these solar cells. Since the literature provides only descriptions of the optical properties of the porous TiO 2 layers with unclear relevance to these solar cells, we investigate porous TiO 2 films really used in DSSCs and potentially usable in PSCs. The effective refractive index and the film porosity for different nanostructures that were fabricated from solution-based techniques were determined. The found values are 1.7982 ± 0.005 for the effective refractive index of one kind of TiO 2 films and 1.62 ± 0.002 for another one. These values lead to porosities of 53.5% and 65%, respectively. The scattering of the films can be described by a wavelength-independent effective scattering parameter for one film type and by effective scattering particles with a diameter of 46.5 nm for the other film type. The determined porosities are also of relevance for the ionic transport which is functionally crucial in DSSCs and a disturbance in PSCs.

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“…Nowadays, new techniques of solar cells have shown a perfect solution to provide low cost alternative compared with conventional methods that used in solar cells [2][3][4][5][6][7][8][9][10]. These methods depend on using low cost active layer with less than 1 μm thickness and also minimizing the fabrication cost [2,[11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Investigating the Optical Behavior of Single/Multi-Dimensional Photonic Crystal Structures for Photovoltaic Applications

Alsayed¹,

Ismail²,

Abdellatif³

2020

Adv. sci. technol. eng. syst. j.

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The results investigated in this work are toward the optimization of the photonic crystal structures in 1D and 2D scale. One-dimensional distributed Bragg reflectors (DBRs) have demonstrated substantial potential in various optoelectronic applications, due to the observed tunable optical band-gap. Herein, the use of DBRs in light trapping solar cells was simulated and validated, representing its effect as a back reflector structure. In terms of the layer thickness, material selection and number of layer, the optimized DBR structure was modeled and evaluated with respect to previously published numerical and experimental data. The proposed model is capable of designing photonic crystal structures with tunable band-gap varies from 400 nm to 700 nm while controlling the pass-band in both Visible and Near Infra-red regions. On the other hand, 2D grating structure has been simulated where the transmission spectra under various design dimensions have been investigated. Finally, thin film deposition is utilized for experimental validation to our proposed optical model.

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Simulating the dispersive behavior of semiconductors using the Lorentzian–Drude model for photovoltaic devices

Cited by 21 publications

References 15 publications

Enhancing the absorption capabilities of thin-film solar cells using sandwiched light trapping structures

Enhancing the absorption capabilities of thin-film solar cells using sandwiched light trapping structures

Refractive index and scattering of porous TiO 2 films

Investigating the Optical Behavior of Single/Multi-Dimensional Photonic Crystal Structures for Photovoltaic Applications

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