HAMZA Bennacer

Zaitar Oussama Nour Eddine , Meterfi Mohamed El Amin

Etude des propriétés optoélectroniques pour le double pérovskite Ba2BiTaS6

Chammes Eddin Ferahtia , Abdelhak Faid

Dispositif de mesure non invansive et de prediction de la glycemie (1275)

BOUKRAA Bochra

Aperçu sur la transmission par fibre optique dans le réseau mobile Etudes pratique de DWDM HUAWEI Optix OSN 9800

Karbi Mohamed , Benaissi Maroua

Aperçu sur la transmission dans le réseau Mobiles Etudes pratique de l’équipement HUAWEI.

Hmaitiche Abdelkrim , Djouber Sifedin

Study and numerical simulation of photovoltaic cells based on chalcostibite materials.

FERHATI Houssem , HADJI Mohammed

Conception et réalisation d’une Machine à commande Numérique CNC

KETFI Mohammed El Amine

Contribution à l’étude des propriétés physiques des matériaux chalcostibites et emplectites : Applications Photovoltaïques

CHARIK Haouari

Étude théorique des matériaux a cristaux photoniques unidimensionnels : applications dans le domaine de détection

Chebabhi Younes , Lasledj Ahmed

Etude et réalisation d’un système de tel-surveillance dans les postes-cabines MT-BT de SONELGAZ.

Ouanes Smail , Ferhati Mounir

L’arrosage Automatique Par Arduino.

Seddik SALMI , Elmahdi Louai GHETAI

Calcul ab-initio des propriété optoélectronique du BeGaP2 pour des applications photovoltaïque - via l’approche TB-mbj

BENSALEM Elmahdi Naceur , KAHILI Mohamed Mostapha

Contribution à l’étude des cellules photovoltaïques hétérostructure et tandem Sous AMPS-1D

DAHMANI Nour El Houda , ROUIBI Ines

Etude d’une cellule photovoltaïque hétéro-structure a base du ZnSiP2 avec le simulateur AMPS-1D

BENCHEIKH Halima , LAGHOUAG Ahlam

Etude et simulation d’une cellule solaire à base des éléments chalcogènes

HADJ BELKACEM Mohamed , LAALMI Abdeselem

Etude des propriétés optoélectroniques du ternaire semi-conducteur ZnSnP2 : une application photovoltaïque

BOUAFIA Halima , MESSAOUDI Chahira

Etude et simulation d’une cellule photovoltaïque à base de chalcopyrite

DAKHOUCHE Oussama , BERRABAH Mohamed lamine

Etude des propriétés optoélectronique du semi-conducteur ternaire CuGaTe2

BELOUADAH Omar Farouk

Etude et simulation d’une cellule photovoltaïque à base des semi-conducteurs III-V

DECHOUCHA Djamel

Etude des propriétés électronique et optique linéaire pour la chalcopyrite CuAlTe2

HgSe is a mercury chalcogenide material of the HgX family (where X = S, Se, Te) which crystallises in the zincblende crystal phase. The electronic band structure of HgSe is indicative of a new state of matter in the condensed phase that is of great interest for fundamental physics and possibly new applications. This paper reports ab-initio calculations of the structural, electronic, magnetic, and optical properties of zincblende mercury selenide (HgSe) doped with manganese (Mn) in the inter sites HgMnxSe, with x = 0, 0.058, and 0.117, using the framework of spin-polarized density functional theory. The aim of our investigation is to discuss the different properties of this doped material in order to improve the promising new domain of spintronics with topological systems. Both the GGA+U+mBJ approach and spin-orbit coupling are used for band structure calculations and density of states. The results show a nontrivial topological semimetal order for HgSe and a ferromagnetic topological and metallic behaviour for HgMnxSe. The frequency response of optical properties shows interesting characteristics. Furthermore, the variation with concentration x of the critical point for each of the optical parameters is similar to that of the inverted band gap.

Citation

Hamza BENNACER , , (2024-01-17), Electronic and Optical Properties of Mn-Doped HgSe Topological Insulator for Spintronic Devices, ECS Journal of Solid State Science and Technology, Vol:2024, Issue:2024, pages:2024, IOP science

Through experimental exploration, diverse phases—tetragonal and orthorhombic—have been observed within the Cu2ZnGexSn1−xS4 region (0 ≤ x ≤ 1), hinting at potential miscibility gaps. To complement these findings, our computational investigation, employing density functional theory (DFT), delves into the Ge substitution-induced phase transition in Cu2ZnGexSn1−xS4. Contrary to a single-phase behavior, our FP-LAPW at zero temperature results reveal a compelling shift from stannite (Sn-rich) to Wurtzite-Stannite (Ge-rich) at xGe ≈ 80%. Negative enthalpy of formation values indicates the inherent stability of these structures. The calculations reveal an estimated 8.884 meV per atom difference in enthalpies of formation between the Stannite and Wurtzite-Stannite phases for Cu2ZnSnS4. For Cu2ZnGeS4, the Wurtzite-Stannite structure emerges as the most stable, closely trailed by the Stannite structure, with enthalpies of formation at − 4.833 eV·atom−1 and − 4.804 eV·atom−1, respectively. Furthermore, our quasi-harmonic Debye model facilitates the analysis of phase transitions triggered by the introduction of germanium. This is achieved by calculating the Gibbs energy, which remains unaffected by variations in temperature and pressure. As the tin cation is replaced by the smaller germanium cation, there is an observable decrease in the cell parameters. The corresponding reduction in cell volume adheres to the principles of Vegard's Law. Exploring the behavior of these materials in diverse conditions can significantly contribute to enhancing the performance and stability of devices built upon Cu2ZnGexSn1−xS4.

Citation

Hamza BENNACER , , (2023-12-25), Investigating solid solutions: Geometric transformations triggered by germanium incorporation in Cu2ZnGexSn1−xS4, Materials today communications, Vol:38, Issue:, pages:107967, Elsevier

Predicting Lattice Constant for Complex Cubic Perovskite X2YY’O6 using LSTM machine learning method.

Citation

Hamza BENNACER , MOHAMMED ASSAM Ouali , Inas bouzateur , ,(2023-12-25), Predicting Lattice Constant for Complex Cubic Perovskite X2YY’O6 using LSTM machine learning method.,3rd International Conference on Scientific and Academic Research.,Konya/Turkey.

Through experimental exploration, diverse phases—tetragonal and orthorhombic—have been observed within the Cu ZnGeSn2x1−xS4 region (0 ≤ x ≤ 1), hinting at potential miscibility gaps. To complement these findings, our computational investigation, employing density functional theory (DFT), delves into the Ge substitution-induced phase transition in Cu2ZnGeSnx1−xS4. Contrary to a single-phase behavior, our FP-LAPW at zero temperature results reveal a compelling shift from stannite (Sn-rich) to Wurtzite-Stannite (Ge-rich) at xGe ≈ 80%. Negative enthalpy of formation values indicates the inherent stability of these structures. The calculations reveal an estimated 8.884 meV per atom difference in enthalpies of formation between the Stannite and Wurtzite-Stannite phases for Cu2ZnSnS4. For Cu2ZnGeS4, the Wurtzite-Stannite structure emerges as the most stable, closely trailed by the Stannite structure, with enthalpies of formation at − 4.833 eV⋅atom− 1 and − 4.804 eV⋅atom− 1, respec- tively. Furthermore, our quasi-harmonic Debye model facilitates the analysis of phase transitions triggered by the introduction of germanium. This is achieved by calculating the Gibbs energy, which remains unaffected by variations in temperature and pressure. As the tin cation is replaced by the smaller germanium cation, there is an observable decrease in the cell parameters. The corresponding reduction in cell volume adheres to the principles of Vegard’s Law. Exploring the behavior of these materials in diverse conditions can significantly contribute to enhancing the performance and stability of devices built upon Cu2ZnGe Sn x 1− xS4.

Citation

Moufdi Hadjab , Hamza BENNACER , Ziane Mohamed Issam, , (2023-12-25), Investigating solid solutions: Geometric transformations triggered by germanium incorporation in Cu2ZnGeSnx1−xS4, Materials Today Communications, Vol:38, Issue:1, pages:9, Elsevier

This study focuses on investigating the phase transitions in two materials, Cu 2 ZnSnS 4 (CZTS) and Cu 2 ZnGeS 4 (CZGS), which are important for understanding their structural and functional properties. The temperature and pressure-induced tetragonal-orthorhombic phase transitions in these materials are analyzed using density functional theory (DFT) and the quasi-harmonic Debye model. The research aims to examine the changes in the material's structure and the associated thermodynamic properties during these phase transitions. The results reveal that both compounds exhibit a negative value of δH mix , indicating the release of energy during the mixing process, which suggests an exothermic nature. The DFT calculations at zero temperature and pressure demonstrate that the stannite structure represents the ground state configuration of the Cu 2 ZnSnS 4 system (with x Ge = 0%), compared to the wurtzite-stannite structure. The calculations also show that the difference in enthalpies of formation (δH) between the stannite and wurtzite-stannite phases for CZTS is estimated to be 8.884 meV per atom. Regarding Cu 2 ZnGeS 4 , the wurtzite-stannite structure is found to be the most stable, closely followed by the stannite structure, with enthalpies of formation of −4.833 eV·atom −1 and −4.804 eV·atom −1 , respectively. Notably, there are no definitive reports on enthalpy studies for the Cu 2 ZnGeS 4 system in the existing literature. Understanding the behavior of these materials under different conditions can contribute to the development of improved performance and stability of devices based on CZTS and CZGS.

Citation

Hamza BENNACER , Moufdi Hadjab , , (2023-12-19), Temperature and Pressure-Induced Phase Transitions in Cu2ZnSnS4 and Cu2ZnGeS4: Thermodynamic Analysis and Structural Transformations, Engineering Proceedings, Vol:56, Issue:, pages:Eng. Proc. 2023, 56(1), 127, MDPI

Investigation of the structural and electronic characteristics of SrTiO3 using first principles calculations

Citation

Hamza BENNACER , ,(2023-12-02), Investigation of the structural and electronic characteristics of SrTiO3 using first principles calculations,1st national conference on physics and it's applications,Bousaada

In this work, we investigated the optoelectronic properties of MgZnO using density functional theory based on linear augmented plane wave (FP-LAPW) method. To deal with the exchange-correlation potential for total energy calculations, the LDA and GGA approximations were used. In addition, the modified Becke Johnson (TB-mBJ) approach, which successfully corrects the band gap problem, was used for the band structure calculations. The calculated lattice constants and band gap values for this compound are in good agreement with available theoretical data. As well as the dielectric function and the absorption coefficient are calculated to get the optical parameters. The achieved results indicate that this material is particularly interesting for photovoltaic conversion applications.

Citation

Hamza BENNACER , Moufdi Hadjab , ,(2023-10-31), First-principles study on optoelectronic properties for caswellsilverite mixed metal oxide MgZnO,The 4th International Electronic Conference on Applied Sciences (ASEC2023),Online

This study focuses on investigating the phase transitions in two materials, Cu 2 ZnSnS 4 (CZTS) and Cu 2 ZnGeS 4 (CZGS), which are important for understanding their structural and functional properties. The temperature and pressure-induced tetragonal-orthorhombic phase transitions in these materials are analyzed using density functional theory (DFT) and the quasi-harmonic Debye model. The research aims to examine the changes in the material's structure and the associated thermodynamic properties during these phase transitions. The results reveal that both compounds exhibit a negative value of δH mix , indicating the release of energy during the mixing process, which suggests an exothermic nature. The DFT calculations at zero temperature and pressure demonstrate that the stannite structure represents the ground state configuration of the Cu 2 ZnSnS 4 system (with x Ge = 0%), compared to the wurtzite-stannite structure. The calculations also show that the difference in enthalpies of formation (δH) between the stannite and wurtzite-stannite phases for CZTS is estimated to be 8.884 meV per atom. Regarding Cu 2 ZnGeS 4 , the wurtzite-stannite structure is found to be the most stable, closely followed by the stannite structure, with enthalpies of formation of −4.833 eV·atom −1 and −4.804 eV·atom −1 , respectively. Notably, there are no definitive reports on enthalpy studies for the Cu 2 ZnGeS 4 system in the existing literature. Understanding the behavior of these materials under different conditions can contribute to the development of improved performance and stability of devices based on CZTS and CZGS.

Citation

Hamza BENNACER , Moufdi Hadjab , ,(2023-10-27), Temperature and Pressure-Induced Phase Transitions in Cu2ZnSnS4and Cu2ZnGeS4 : Thermodynamic Analysis and Structural Transformations,The 4th International Electronic Conference on Applied Sciences (ASEC2023),Online

Insights into structural and electronic properties of CaTiO3 perovskite: Density functional calculations

Citation

Hamza BENNACER , ,(2023-10-23), Insights into structural and electronic properties of CaTiO3 perovskite: Density functional calculations,nd National Conference on Applied Science and Advanced Materials, NCASAM-2023.,Sekikda

Structural, elastic, and electronic properties of cubic perovskite compound BaTiO3 : ab initio study

Citation

Hamza BENNACER , ,(2023-10-10), Structural, elastic, and electronic properties of cubic perovskite compound BaTiO3 : ab initio study,2nd International Conference on Computational & Applied Physics, ICCAP 2023.,Blida

As an alternative to traditional photovoltaic semiconductors, perovskite materials like ABX3 have recently caught the interest of researchers. These materials' unique physical traits and specific gap value, which have a significant impact on their overall effectiveness and performance, are what essentially led to this shift in attention. Using the ab initio method calculations. The structural and electrical characteristics of CaSiO3, a tetragonal compound, are investigated in this work using first-principles calculations based on the full potential-linearized augmented plane wave technique (FP-LAPW) within the density functional theory (DFT). Our study thoroughly examines electrical properties, such as band structure and density of states (DOS), in order to predict CaSiO3 viability as a potential photovoltaic material. CaSiO3 is a promising candidate for future exploration because preliminary results indicate that it exhibits semiconductor properties.

Citation

Hamza BENNACER , ,(2023-09-09), First-principles calculations to investigate the structural and electonic properties of tetragonal CaSiO3,The 4th International Electronic Conference on Applied Sciences (ASEC2023),Online - Italia

Perovskites have gained significant attention in recent years due to their unique and versatile material properties. The lattice parameters of the perovskite compounds play a crucial role in the engineering of layers and substrates for heteroepitaxial thin films. As an essential parameter in the cubic perovskite structure, the lattice constant, plays a significant role in the development of materials for specific technological applications and serves as a distinctive identifier of the crystal structure of the material. In the field of materials science, advanced Computational Intelligence (CI)-based techniques have become increasingly important for simulating the relationship between the physicochemical parameters of chemical elements and the physical properties of materials and compounds. Hence, this paper presents efficient techniques based on artificial neural network (ANN) and fuzzy logic to predict the lattice constants of pseudo-cubic and cubic perovskites. The identification of optimized parameters for the ANN and fuzzy logic models is accomplished using innovative metaheuristic algorithms such as, Particle Swarm Optimization (PSO), Invasive Weed Optimization (IWO) and Imperialist Competitive Algorithm (ICA). In the first part, the study assessed, the effectiveness of various metaheuristic algorithms (PSO-IWO-ICA) in tuning the parameters of the ANN prediction structure in order to get the optimal parameter of the ANN. Whereas in the second part, once we extracted the best optimization algorithm, we combined it with the fuzzy logic technique and then we compared the effectiveness of the two techniques, ANN and Fuzzy logic. On the basis of root mean square error (RMSE), mean absolute error (MAE) and the coefficient of determination (R2), the proposed PSO-ANN and PSO-Fuzzy based models are compared with existing and recent models such as Ubic, Sidey, and Owolabi. The proposed PSO-Fuzzy model performs better than our PSO-ANN model, the Ubic, Sidey, and Owolabi models, with performance improvement of 70.90%, 90.36%, 89.74% 84.46%, respectively on the basis of RMSE. Similarly, it attains performance improvement of 71.26%, 90.31%, 89.58%, and 85.02% on the basis of MAE. Furthermore, the developed PSO-ANN based model outperforms the Ubic, Sidey and Owolabi models with performance improvement of 66.86%, 64.74% and 46.60% respectively, on the basis of RMSE and percentage enhancement of 66.27%, 63.75%, and 47.90% when compared on the basis of MAE. Although the PSO-Fuzzy model has the best performance of all the compared models, the developed PSO-ANN based model possesses the advantage of easy implementation in addition to its moderate performance.

Citation

Hamza BENNACER , MOHAMMED ASSAM Ouali , Inas bouzateur , , (2023-09-04), Perovskite lattice constant prediction framework using optimized artificial neural network and fuzzy logic models by metaheuristic algorithms, Materials today communications, Vol:37, Issue:, pages:107021, Elsevier

Classification and prediction of water quality index using deep learning techniques

Citation

Hamza BENNACER , Mohamed Ladjal , MOHAMMED ASSAM Ouali , ,(2023-07-10), Classification and prediction of water quality index using deep learning techniques,International Conference on Nonlinear Science and Complexity (ICNSC, 2023),Turkey.

Computational prediction of structural, electronic, and elastic characteristics of the cubic perovskite CaSiO3: ab-initio calculation

Citation

Hamza BENNACER , ,(2023-05-10), Computational prediction of structural, electronic, and elastic characteristics of the cubic perovskite CaSiO3: ab-initio calculation,Computational and Applied Physics Symposium 2023 - (CAPS2023),KHEMIS MILIANA

EMD Based Average Wavelet coefficient method for ECG Signal Denoising

Citation

Hamza BENNACER , Zahia nabi , MOHAMMED ASSAM Ouali , Mohamed Ladjal , ,(2023-04-17), EMD Based Average Wavelet coefficient method for ECG Signal Denoising,International Conference of advanced Technology in Electronic and Electrical Engineering (ICATEEE),University of M'sila

Sensor Anomaly Detection using Self Features Organizing Maps and Hierarchical-Clustring for Water Quality Assessment

Citation

Hamza BENNACER , Mohamed Ladjal , MOHAMMED ASSAM Ouali , ,(2023-04-17), Sensor Anomaly Detection using Self Features Organizing Maps and Hierarchical-Clustring for Water Quality Assessment,ICATEEE,University of M'sila

Soft Sensing Modeling Based on Support Vector Machine and Self-Organaizing Maps Model Selection for Water Quality Monitoring

Citation

Hamza BENNACER , Mohamed Ladjal , MOHAMMED ASSAM Ouali , ,(2023-04-17), Soft Sensing Modeling Based on Support Vector Machine and Self-Organaizing Maps Model Selection for Water Quality Monitoring,ICATEEE,University of M'sila

Lattice Constant Prediction of Complex Cubic Peroveskite A2BCO6 using Extreme learning Machine

Citation

Hamza BENNACER , ,(2023-04-17), Lattice Constant Prediction of Complex Cubic Peroveskite A2BCO6 using Extreme learning Machine,ICATEEE,University of M'sila

Electrocardiogram (ECG) is one of the main tools to interpret and identify cardiovascular disease. ECG signals are frequently submitted to various noises, which alter the original signal and reduce its quality. ECG signal filtering enables cardiologists to assess heart health accurately. The present paper presents a newfound approach for ECG signal denoising built on two techniques which are EMD (Empirical Mode Decomposition) and AWC (Average Wavelet Coefficient method). The basic idea behind the suggested technique initially consists of deconstructing noisy ECG signal data on a restricted number of IMFs (Intrinsic Mode Functions) and then using the AWC technique to compute each IMF’s Hurst exponent. Finally, after a thresholding operation, the clean ECG signal is recovered by adding all IMFs, excluding those considered parts of noise. The suggested approach is assessed over experiments using the MIT-BIH databases. The experimental results reveal that the suggested method efficiently extracts ECG signals from noisy data samples.

Citation

MOHAMMED ASSAM Ouali , Mohamed Ladjal , Hamza BENNACER , ,(2023-04-17), EMD Based Average Wavelet Coefficient Method for ECG Signal Denoising,(ICATEEE),university of m'sila

Double perovskite oxides have received a lot of interest in the last ten years because of their distinctive and adaptable material properties. Among the six parameters in the cubic structure, the lattice constant is the sole changeable parameter, which plays an important role in developing materials for particular technological applications and distinctively identifies the crystal structure of the material. In this paper, the extreme learning machine (ELM) is used to correlate the lattice constant of A+22BCO6 cubic perovskite compounds, such as their ionic radii, electronegativity, oxidation state, and lattice constant. We investigated 147 compounds with lattice constants between 7.700 and 8.890Å. The prediction method has a high level of accuracy and stability and provides accurate estimates of lattice constants.

Citation

MOHAMMED ASSAM Ouali , Mohamed Ladjal , Hamza BENNACER , ,(2023-04-17), Lattice Constant Prediction of Complex Cubic Peroveskite A2BCO6 using Extreme Learning Machine,(ICATEEE),university of m'sila

The electronic band gap energy is an essential photo-electronic parameter in the energy applications of engineering materials, particularly in solar cells and photo-catalysis domains. A prediction model that can correctly predict this band gap energy is desirable. A new approach for predicting a band gap energy is suggested in this paper. The proposed structure is based on artificial neural networks (ANN) and the particle swarm optimization algorithm (PSO); this structure can solve the artificial neural network’s local minima issue while preserving the fitting quality. Our technique will hasten the identification of novel chalcopyrite in photovoltaic solar cells with improved resolution. The suggested model combines two sub-systems in a parallel configuration. A conventional prediction system with a low resolution for the training data being considered makes up the first ANN subsystem. A second ANN sub-system, labelled the error model, is introduced to the primary system to address the resolution quality issue, representing uncertainty in the primary model. The particle swarm optimization algorithm is used to identify the parameters of the proposed neural system. The method’s effectiveness is assessed in terms of several criteria, and the output of our system shows good performance compared to experimental and other calculated results. Several benchmark approaches were compared with the proposed system in detail. Numerous computer tests show that the suggested strategy can significantly enhance convergence and resolution.

Citation

Inas bouzateur , Hamza BENNACER , MOHAMMED ASSAM Ouali , Mohamed Ladjal , , (2023), A new ANN-PSO framework to chalcopyrite’s energy band gaps prediction, Materials Today Communications, Vol:34, Issue:105311, pages:11, Bouzateur inas

In this study, we have investigated physical ground-state properties of three novel semiconductors to address many problems related to the photovoltaic (PV) industry. A computational package (wien2k) based on Density Functional Theory (DFT) is used to study the optical, structural, as well as electronic properties of delafossite transparent conducting oxides CuMO2 (M= Al, Sc and Y). The Full-Potential Linearized Augmented Plan Wave method (FP-LAPW) which is based on DFT has also been employed in this study. To compute the structural and electronic parameters the Local Density Approximation (LDA), Perdew, Burke and Ernzerhof Generalized Gradient Approximation (PBE-GGA) have been utilized as the exchange-correlation term. Furthermore, Tran-Blaha modified Beck–Johnson potential (TB-mBJ) has been utilized to achieve better degree of accuracy in computing the electronic and optical characteristics. The results of the study have also been compared to the previous theoretical and experimental ones. The ternary delafossite transparent conducting oxide compounds can be considered as an alternative material in photovoltaic applications.

Citation

Hamza BENNACER , Moufdi Hadjab , , (2022), Ground-state properties of p-type delafossite transparent conducting oxides 2H-CuMO2 (M=Al, Sc and Y): DFT calculations., Materials Today Communications – Elsevier., Vol:32, Issue:, pages:103995, Elsevier

In this work, optoelectronic and magnetic properties of Co-doped and (Co, Sm) co-doped ZnS have been studied using the first principles calculation based on density functional theory (DFT) and FP-LAPW method with GGA and GGA + U approximations in zinc blende structure. The lattice parameter will increase by (Co, Sm) co-doping ZnS. The difference in total energy is calculated and confirms the stability of ZnS: Co in ferromagnetic states (FM) and ZnS: (Co, Sm) in antiferromagnetic states (AFM). The total magnetic moment is found to be more interesting by (Co, Sm) co-doping. The band structure, the total density of states (TDOS) and partial density of states (PDOS) show that ZnS: Co has a semiconducting character. While ZnS: (Co, Sm) has half-metallic character behavior with 100% spin polarization at the Fermi level provided by the RE-4f states. Moreover, optical properties such as dielectric functions and absorption coefficients for ZnS: Co and ZnS: (Co, Sm) were also discussed and found to be more interesting in the visible region by (Co, Sm) co-doping. The improved optical and magnetic results indicate that (Co, Sm) co-doped ZnS can be used as a promising candidate for optoelectronic and spintronic devices in the future.

Citation

Hamza BENNACER , , (2022), First principles investigations of optoelectronic and magnetic properties of co-doped zinc sulphide by 3d and 4f elements., Computational Condensed Matter- Elsevier., Vol:33, Issue:, pages:e00746, Elsevier

In this investigation a novel PSO-ANN scheme for composite materials properties prediction is presented. It is based on neural networks which are used in many applications such as image recognition, classification, control and system identification. This approach will deal with local minima problem of the neuronal networks architecture and simultaneously preserve the fitting quality. The proposed scheme comprises a parallel interconnection of tow sub-ANN prediction systems. The first sub-ANN prediction system is the primary system, which represents an ordinary system with a low resolution for the trainig data under consideration (composite materials properties). To overcome resolution quality problem, and obtain a prediction system with higher resolution, we will introduce a second ANN sub model called Error model which will represent a model for the error between the primary prediction system and the real training data. ANN scheme Identification is achieved by innovative metaheuristic algorithm such as particle swarm optimization (PSO). The method’s effectiveness is evaluated through testing on the composite materiels to predicte thier physical propreties. Intensive computer experimentations confirm that the proposed approach can significantly improve convergence and resolution

Citation

Hamza BENNACER , ,(2022), A New PSO-ANN Scheme for Composite Materials Properties Prediction.,The international symposium on applied mathematics and engineering, ISAME 2022 istanbul-turkey. (Online),Istanbul-Turkey.

Structural and electronic properties of silar cell compound CuAlX2(X=Se, Te): an ab-initio approach

Citation

Hamza BENNACER , ,(2022), Structural and electronic properties of silar cell compound CuAlX2(X=Se, Te): an ab-initio approach,The First International Conference on Advanced Renewable Energy Systems (ICARES'22),UDES-Bousmail-Tipaza , Algeria.

Numerical study of ZnO/CdS/CdSnP2 solar cells

Citation

Hamza BENNACER , ,(2022), Numerical study of ZnO/CdS/CdSnP2 solar cells,3rd International conference on applied engineering and natural sciences (online),Konya - Turkey

Double perovskite oxides have received a lot of interest in the last ten years because of their distinctive and adaptable material properties. Among the six parameters in the cubic structure, the lattice constant is the sole changeable parameter, which plays an important role in developing materials for particular technological applications and distinctively identifies the crystal structure of the material. In this paper, the extreme learning machine (ELM) is used to correlate the lattice constant of A_2^(+2) BCO_6 cubic perovskite compounds, such as their ionic radii, electronegativity, oxidation state, and lattice constant. We investigated 147 compounds with lattice constants between 7.700 and 8.890Å. The prediction method has a high level of accuracy and stability and provides accurate estimates of lattice constants.

Citation

Hamza BENNACER , MOHAMMED ASSAM Ouali , Mohamed Ladjal , Moufdi Hadjab , Inas bouzateur , ,(2022), Lattice Constant Prediction of Complex Cubic Peroveskite A2BCO6 using Extreme Learning Machine,International Conference of advanced Technology in Electronic and Electrical Engineering (ICATEEE),Msila, Algeria

Due to their useful physical properties, copper-based chalcogenides materials are recently promising for numerous emerging technological fields. In photovoltaics, discovering and designing suitable materials for solar cells is a primary technical challenge. The structural, electrical, optical, and thermoelectric properties for both CuYSe2 and CuYTe2 in the hexagonal phase, as well as CuYS2 in the orthorhombic phase have been investigated using a numerical Full Potential-Linearized Augmented Plane Wave (FP-LAPW) technique based on Density Functional Theory (DFT). To compute the structural properties, both, the local density approximation (LDA) and the generalized gradient approximation (PBE-GGA) were used as exchange-correlation potentials. On the other hand, the modified Becke-Johnson (mBJ) was used to compute the optoelectronic, properties with higher degree of precision. Our calculations revealed that these three compounds have indirect band gaps in the range of 0.6 eV–2.1 eV. Moreover, numerous thermoelectric qualities of the investigated compounds estimated as a function of chemical energy at different temperatures using the semi-local Boltzmann transport theory, whereby the findings exhibit a higher Seebeck coefficient for CuYS2 compared to CuYZ2(Z = Se and Te) up to 2.7 mV/K for CuYS2 at 300 K, with acceptable values of thermal and electronic conductivity. The quasi-harmonic model is used to examine thermodynamic properties such as heat capacity at constant pressure and volume, entropy, Debye temperature, and thermal expansion coefficient under both pressure and temperature influences. As a result of this study, CuYS2, CuYSe2 and CuYTe2 are promising materials for optoelectronic devices, especially as photovoltaic materials in solar cells.

Citation

Hamza BENNACER , MOHAMMED ELAMIN KETFI , SABER SAAD ESSAOUD , , (2021-12-10), Computational evaluation of optoelectronic, thermodynamic and electron transport properties of CuYZ2 (Z= S, Se and Te) chalcogenides semiconductors, Materials Chemistry and Physics – Elsevier., Vol:277, Issue:125553, pages:15, Elsevier

The main aim of this work is to determine and explain the relationships between optoelectronic properties and the sulfur anion content in Cu2ZnSn(SxSe1−x)4 solid solution. Band gap and absorption coefficient are of primary interest to the engineers and scientists researcher worked in optoelectronic field. Herein, the electronic and optical properties are calculated based on 128 conventional atoms within lattice parameters obtained at 300 K by using the FP-LAPW method combined with quasi-harmonic Debye model. The composition dependent band gaps of CZTSSe solid solutions are investigated by TB-mBJ+U. As results, all materials are semiconductors with a direct band gap ranging from 0.614 to 0.99 eV. The band gap variation increases as a function of sulfur anion content and showed a positive deviation from Vegard's law with a very small downward bowing parameter of + 0.079 eV. The density of state (DOS) calculations indicate that the energy bands of VBM involve Cu_d/anion(S/Se)_p hybridized antibonding-like states. Based on band alignment, the Ec offset between CZTS and CZTSe is larger than the Ev offset. These results are reported previously in other work and are confirmed in this study. Our work included a systematic comparison of the influence of S/(S+Se) atomic ratios on optical quantities. The dielectric function tensors show remarkable anisotropy. In addition, the static dielectric constants are found to decrease with sulfur anion content. The CZTSSe is proved to be suitable for good solar cells with high absorption coefficient (> 104 cm−1). Such deep optical studies would be helpful for future optoelectronic applications of these compounds with different S/(S+Se) atomic ratios.

Citation

Hamza BENNACER , Moufdi Hadjab , Mohamed Issam Ziane, , (2021), Anisotropic optical properties of Cu2ZnSn(SxSe1-x)4 Solid solutions: First-principles calculations with TB-mBJ+U., Optik – Elsevier., Vol:243, Issue:, pages:167490, Elsevier

A numerical full-potential linearized augmented plane method within density functional theory is performed to study the electronic structure include, energy band gap, total and partial density of states and chemical bonding as well as optical constants of Ba1−xSrxTiO3 (BST) (0≤ x ≤ 1) crystalizes in the paraelectric and ferroelectric phases. Results obtained using the improved [Koller-Tran-Blaha]-mBJ potential show excellent agreement with the experimental data. It is observed that the band gap in BST crystals increases with increasing Sr dopants due to the resonant interaction of O_2p orbitals mixed with co-doping Sr_4d states with the top of the valence band. BST exhibits a direct band gap at x range ~0.04–0.88 covering the wavelengths range ~397–436 nm within the visible spectrum region. The dielectric functions and optical constants such as refractive index, reflectivity and absorption coefficient are computed for radiation range 0–10 eV in comparison with measured data. The critical-point energies in various optical spectra are due to interband transitions from occupied O_2p states and little admixture of Sr_4p/d and Ba_4p orbitals localize in the top of the valence band to unoccupied Ti_3d, Sr_4p, and Ba_4d orbitals localize in the bottom of the conduction band. Excellent ultraviolet absorption (~4–8 eV) and visible regime transparency are achieved. BaSrTiO3 (BST) perovskite is a promising candidate for manufacturing low-cost high-efficiency solar cells and designing of novel sources of light operating in the visible spectrum region.

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Hamza BENNACER , , (2021), Band gap and emission wavelength tuning of Sr-doped BaTiO3 (BST) perovskites for high-efficiency visible-light emitters and solar cells., Materials Science in Semiconductor Processing – Elsevier, Vol:130, Issue:, pages:105837, Elsevier

In this work, we studied the magnetic stability, electronic and optical properties of Gd doped CdS and (Gd, Mn) co-doped CdS, in a zinc blend structure, using first-principles calculations based on the full-potential linearized augmented plane wave method (FP-LAPW) with the GGA + U approximation. The lattice parameter increases by Gd doping and decreases by (Gd, Mn) co-doping. The calculations of the differences in total energies ΔE prove that the CdS: Gd is stable in the antiferromagnetic state (AFM). While, the co-doped system CdS: (Gd, Mn) is stable in the ferromagnetic states (FM). The CdS: (Gd, Mn) has an interesting magnetic moment compared to the CdS: Gd. The total densities of states show the metallic character of the CdS: Gd and the half-metallic character of CdS: (Gd, Mn). The real and imaginary parts of the dielectric function, the absorption coefficient, and the refractive index are calculated. Both systems have a significant redshift and have a strong light absorption in the visible and UV regions. Co-doping CdS by Gd and Mn gives interesting results compared to the CdS: Gd. These make CdS: (Gd, Mn) an important material for different applications. This work provides the possibility to fabricate new optoelectronic and spintronic devices.

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Hamza BENNACER , , (2021), First principles calculations of structural, electronic, magnetic and optical properties of Gd doped and Gd, Mn co-doped zinc blende CdS, Computational Condensed Matter- Elsevier., Vol:29, Issue:, pages:e00590, Elsevier

In this study, 1D Photonic Crystal (PhC) with Nematic Liquid Crystal (N-LC) central microcavity is analyzed and discussed using Rigorous Coupled Wave Analysis (RCWA) method. A microcavity is inserted into the 1D PhC by the Air Defect, making it ideal for measuring the properties of an N-LC contained inside the microcavity. Here simulation is considered for N-LC (E7) as a thermal sensor. The principle of photonic crystal thermal sensor operation is studied in the TE mode of the incident beam. We conduct a detailed study of the thermal sensor with differences in the width of central microcavity of N-LC. The sensitivity and quality factor are evaluated. Compared to other photonic crystal sensors mentioned previously, this thermal optical sensor has a much simpler structure and higher sensitivity.

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Hamza BENNACER , , (2021), High-Sensitive Thermal Sensor Based on a 1D Photonic Crystal Microcavity with Nematic Liquid Crystal, Progress In Electromagnetics Research M, Vol:100, Issue:, pages:187-195, Progress In Electromagnetics Research

We present a theoretical study of the electronic structure, magnetic and optical properties of RE-doped zinc sulphide (RE = Sm, Eu, Gd, and Er) in a zinc blende phase, which is investigated using the spin-polarized spin density functional theory (spin-DFT). The First-principles calculations based on density functional theory and the full-potential linearized augmented plane wave method (FP-LAPW) are performed by employing the GGA + U (U is the Hubbard term of the Coulomb repulsion correlation) approximation. The lattice parameter will increase by RE doping ZnS. The total density of states (TDOS) and partial density of states (PDOS) show that all the systems have half-metallic character behaviour with 100% spin polarization at the Fermi level provided by the RE-4f states except ZnS: Eu it has a semiconductor character. The values of differences in total energy ΔE indicate that ZnS: Sm, ZnS: Eu, and ZnS: Er are stable in the ferromagnetic phase. However, ZnS: Gd favours the AFM phase. The total magnetic moment of all systems is very interesting. All systems showed significant redshift except ZnS: Eu, and all exhibited broad absorption in the UV region. Doping by RE is a feasible method to enhance the electronic, magnetic, and optical properties of ZnS for the new generation of optoelectronic and spintronic applications.

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Hamza BENNACER , , (2021), First-principles studies of electronic structure, magnetic and optical properties of rare-earth (RE= Sm, Eu, Gd, and Er) doped ZnS, Computational Condensed Matter- Elsevier., Vol:30, Issue:, pages:e00632, Elsevier

Recently, II-IV-V2 ternaries have received much concentration due to their valuables properties using in potential applications in optoelectronic, nonlinear optic, and photovoltaic absorber material in solar cells. The main aspects of interest for a material to be used in optoelectronic: emission of light and photovoltaic effect. The optoelectronic properties of BeGeP2 ternary has been theoretically investigated from ab-initio calculation by using the density functional theory within FP-LAPW method integrated in the Wien2k code. Our calculations within TB-mBJ approach indicate optimal bandgap energy and a very high optical absorption coefficient above 105 cm-1, making this compound suitable for solar cell absorbers.

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Hamza BENNACER , ,(2021), Ab-initio calculation of optoelectronic properties of BeGeP2 for solar cells applications,9th (Online) International Conference on Applied Analysis and Mathematical Modeling (ICAAMM21) Istanbul-Turkey.,Istanbul-Turkey.

Structural, electronic, thermoelectric and optical properties of CuAlS2 chalcopyrite material

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Hamza BENNACER , ,(2021), Structural, electronic, thermoelectric and optical properties of CuAlS2 chalcopyrite material,The first International Conference on Sustainable Energy and Advanced Materials IC-SEAM’21 April 21-22, 2021, Ouargla, ALGERIA.,Ouargla, ALGERIA.

The performance of copper indium gallium selenium (CIGS) based solar cells with cadmium sulfide (CdS) and magnesium zinc oxide (MgxZn1-xO) buffer layers has been investigated comparatively with the new version of a one-dimensional device simulation program for the analysis of microelectronic and photonic structures (wxAMPS-1D). The structures of solar cells have been analysed keeping in view the effect of doping as well as of thickness of buffer and absorber layers. It is observed that the conversion efficiency and external quantum efficiency (EQE) are improved using Mg0.125Zn0.875O compound buffer layer for ZnO/Mg0.125Zn0.875O/CIGS structure to 22.01% and 89.7%, respectively, whereas the obtained conversion efficiency and EQE for ZnO/CdS/CIGS structure are 21.06% and 88.78%, respectively. The obtained results are in good agreement with the recently published work and the proposed structure of solar cells would have potential regarding improvements in the existing solar cell technology.

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Hamza BENNACER , Moufdi Hadjab , , (2020), A numerical optimization study of CdS and Mg0.125Zn0.875O buffer layers in CIGS-based solar cells using wxAMPS-1D package, International Journal of Modelling and Simulation – Taylor & Francis, Vol:42, Issue:2, pages:179-191, Taylor & Francis

The physical properties of the ZnSnP2 compound semiconductors in chalcopyrite phase have been investigated by employing full potential linearized augmented plane wave (FP-LAPW) method to solve the Kohn-Sham equations within framework of Density Functional Theory (DFT) using Wien2k tool. The atomic configuration of cell structure is crystalized in the chalcopyrite phase. For this, the Local Density Approximation (LDA) and Wu–Cohen Generalized Gradient Approximation (WC–GGA) were employed as the exchange–correlation term to calculate the structural and electronic properties. Moreover, the Engel–Vosko GGA (EV-GGA) and the recently modified semi–local Becke–Johnson (mBJ) functional were also used to calculate the electronic and optical properties in order to get some better degree of precision. The obtained results are in a good agreement with the experimental data, which indicate that the studied compound is among promising material for thin films solar cells manufacturing.

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Hamza BENNACER , Moufdi Hadjab , ,(2020), First-principles Prediction of Optoelectronics Properties for Zinc-Tin-Phosphate for Thin Film Solar Cells,The eighth edition of the International Renewable and Sustainable Energy Conference (IRSEC’20) (Online),Morocco

Optoelectronics properties of Cu2ZnSn(SxSe1-x)4: DFT calculation

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Hamza BENNACER , ,(2020), Optoelectronics properties of Cu2ZnSn(SxSe1-x)4: DFT calculation,XIIIémes Journées Maghrébines des sciences des matériuax JMSM’2020 – 09-11 Mars 2020- Université Ahmed Ben Bella, Oran1, Algérie.,Université Ahmed Ben Bella, Oran1, Algérie.

We used density functional theory based calculations to investigate the structural and optic properties of copper-based ternary chalcogenide Cu-M-X (M : Sb, Bi & X : S, Se). These form orthorhombic crystallographic structure with Pnma space group. The calculated electronic band structure is indirect for all these compounds in conjunction with a close direct band gap transition. Interestingly, a very high optical absorption coefficient above 105 cm-1 above band gap values is noticed for these materials, making them suitable for ultrathin solar cell absorbers.  

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MOHAMMED ELAMIN KETFI , Hamza BENNACER , SERAI Housseyn, ,(2019-12-26), Ab-initio study on optical properties of CuBiS2-Based solar cells applications,1er Atelier National sur WIEN2k,MOSTAGANEM

A Biometrics identification system is refers to the automatic recognition of individual person based on their characteristics. Basically biometrics system has two broad areas namely unimodal biometric system and multimodal biometric system. However, a reliable recognition system requires multiple resources [1]. Although multimodality improves the accuracy of the systems, it occupies a large memory space and consumes more execution time considering the collected information from different resources. Therefore we have considered the feature selection[2], that is, the selection of the best attributes that enhances the accuracy and reduce the memory space as a solution. As a result, acceptable recognition performances with less forge and steal can be guaranteed. In this work we propose an identification system using multimodal fusion of finger-knuckle-print, fingerprint and palmprint by adopting several techniques in feature level for multimodal fusion[3]. A feature level fusion and selection is proposed for the fusion of these three biological traits. The proposed system has been tested on the largest publicly available PolyU [4] and Delhi FKP[5] databases. It has shown good performance.

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BILAL Attallah , Hamza BENNACER , Mohamed Ladjal , BRIK Youcef , Youssef Chahir, ,(2019), Finger-knuckle-print, Plamprint and Fingerprint for Multimodal Recognition System Based on mRMR features selection,IC2MAS19,Istanbul-Turkey

This paper is dedicated to the ab initio study of the structural and thermodynamic properties of Cu2ZnSn(SxSe1−x)4 bulk alloys. The calculations are conducted using full-potential linear-augmented-plane-wave plus local-orbital (FP-LAPW + lo) method within the revised generalized gradient approximation of Perdew–Burke–Ernzerhof (GGAPBEsol). This method is used to find more valuable equilibrium structural parameters than the simplest approximations of PBE and local density approximation (LDA). The obtained structural properties appear to be affected by the relaxation effect, and all alloys are thermodynamically favorable to the process according to the enthalpy of formation calculations. We find here a nonlinear dependence of lattice parameters a and c with respectively a small downward bowing parameter b of + 0.09 Å and + 0.19 Å for relaxed structures. The thermodynamic quantities, namely the entropy, the constant volume, the pressure heat capacity (Cv and Cp) and Debye temperature, are computed for different S/(S + Se) atomic ratios by varying temperature from 0 K to 1000 K. These quantities are successfully obtained by using the combined approach of FP-LAPW and a quasi-harmonic model. Overall, there is good agreement between our calculated quantities and other results.

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Hamza BENNACER , Mohamed Issam Ziane, Djamel Ouadjaout, Meftah Tablaoui, Rachida Nouri, Wafia Zermane, Abdelkader Djelloul,, Abderrahmane Mokrani, Moufdi Hadjab, Hamza Abid, , (2019), First-Principle Computed Structural and Thermodynamic Properties of Cu2ZnSn(SxSe1−x)4 Pentanary Solid Solution, Journal of Electronic Materials, Vol:48, Issue:11, pages:6991–7002, Springer

The main aspects of interest for a material to be used in optoelectronic: emission of light and photovoltaic effect. Recently, II-IV-V2 compounds have received much concentration due to their potential applications in nonlinear optic, and photovoltaic absorber material in solar cells. The optoelectronic properties of BeSiAs2 ternary have been theoretically investigated from first-principles calculation. In this work, we try to calculate and to study the optoelectronic properties using FP-LAPW method by the Wien2k code within TB-mBJ approximation, to detect their competence and ability in photovoltaic applications.

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Hamza BENNACER , ,(2019), ab-initio investigation of optoelectronic properties of BeSiAs2 -based solar cells application,1er atelier national en Wien2k, 22-26 Décembre 2019, Mostaganem, Algérie.,Mostaganem, Algérie.

There are two main aspects of interest for a material to be used in optoelectronic: emission of light and photovoltaic effect. Currently, chalcopyrite compounds have received much concentration because of their potential applications in the field of light-emitting diodes, nonlinear optic applications, and photovoltaic sensitive material in solar cells. The optoelectronic properties of ZnSnP2 chalcopyrite-type ternary have been theoretically investigated from first principles. In this work we try to calculate and to study the optical properties using the FP-LAPW method within TB-mBJ approximation, to explore their competence and ability in photovoltaic applications.

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Hamza BENNACER , ,(2019), Optoelectronic properties of ZnSnP2-based solar cells: First-principles study via mBJLDA approach,International Conference on Computational Methods in Applied Sciences (ICCMAS19,) July 12-16, 2019 Istanbul-Turkey,Istanbul-Turkey

The all electrons full potential linearized augmented plane waves (FP-LAPW) method with GGA, LDA and mBJ approximation is used to study BaThO3 perovskite in cubic and orthorhombic phases. The structural parameters are found consistent with the experimental results. The electronic band structures and density of states demonstrate that BaThO3 is a wide band gap insulator in both phases. Furthermore, the optical properties demonstrate that the optical gap of the material is 5.8 eV, which lies in the UV region of the electromagnetic spectrum and hence the compound can be used in optoelectronic devices.

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Hamza BENNACER , , (2019), Modified Becke-Johnson (mBJ) exchange potential investigations of the structural and optoelectronic properties of BaThO3 in cubic and orthorhombic phase., Computational Condensed Matter- Elsevier., Vol:16, Issue:, pages:e00355, Elsevier

Experimental investigation and first-principles calculations on the physical properties of CuGaTe2 for solar cells application

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Hamza BENNACER , ,(2019), Experimental investigation and first-principles calculations on the physical properties of CuGaTe2 for solar cells application,3eme Congres International De Physique Et Chimie Quantique CIPCQ 4 -6 Nov, 2019, Béjaia, Algeria.,Béjaia, Algeria.

First-principles calculations and numerical modeling on the structural and optoelectronic properties of chalcopyrite materials for solar cell application.

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Hamza BENNACER , ,(2019), First-principles calculations and numerical modeling on the structural and optoelectronic properties of chalcopyrite materials for solar cell application.,The 2nd Algeria-German international conference on new technologies and their applications, September 22-23, 2019, Sétif, Algeria.,Sétif, Algeria.