V. Hitaishi, Jayakrishnan Kulanthaivel, Nandam Ashok
{"title":"Effects of waveguide dimensions on split-core optical waveguide for dispersion and supercontinuum applications","authors":"V. Hitaishi, Jayakrishnan Kulanthaivel, Nandam Ashok","doi":"10.1007/s10825-025-02311-8","DOIUrl":"10.1007/s10825-025-02311-8","url":null,"abstract":"<div><p>This article presents the theoretical study of a novel chalcogenide optical waveguide. The core of waveguide consists of two D-shaped structures separated by a slab. The cladding is a rectangular slab containing a core within its dimensions. The chalcogenides GeAsSe and GeAsS are considered to be core and cladding of the waveguide, respectively. The dispersion effects and supercontinuum (SC) were calculated for various values of the radius of the top D-shaped core (<i>D</i>) and offset distance (<i>d</i>) from the right end of the bottom core. SC is generated by pumping 50 fs secant hyperbolic (sech) pulses at 1 kW peak power at 3.5 µm as a central wavelength. The maximum wide-spectrum, ranging from 2.2 to 6.5 µm was obtained for <i>D</i> = 1.7 µm and <i>d</i> = 0.4 µm. Increase in ‘<i>d</i>’ leads to a uniform intensity of output SC spectra with sacrificing a small amount of broadening. These results should be useful to create SC sources with uniform intensity as well as broad spectrum in the near to mid-infrared regions.</p></div>","PeriodicalId":620,"journal":{"name":"Journal of Computational Electronics","volume":"24 3","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yiping Xiao, Haiyang Zhang, Honghao Wei, Chao Wang, Song Wu, Jun Shu
{"title":"Parameters identification of photovoltaic cell and module models based on the CSAO algorithm","authors":"Yiping Xiao, Haiyang Zhang, Honghao Wei, Chao Wang, Song Wu, Jun Shu","doi":"10.1007/s10825-025-02290-w","DOIUrl":"10.1007/s10825-025-02290-w","url":null,"abstract":"<div><p>Photovoltaic cell models involve nonlinear and complex parameters, and traditional identification methods often suffer from slow convergence and local optima issues, limiting their efficiency. Metaheuristic algorithms have been developed to enhance the accuracy and efficiency of parameter identification. This paper proposes a coati improved snow ablation optimization (CSAO) incorporating Weibull distribution and elite retention. First, a random probability mechanism combines the coati optimization algorithm with the basic snow ablation optimization, enhancing its global search capability. Second, a search mechanism based on Weibull distribution is incorporated to broaden the search range during local exploitation, helping to avoid falling into local optima. Finally, an elite retention strategy is added to accelerate convergence speed. The CSAO algorithm was evaluated using the CEC2017 benchmark function set. The CSAO algorithm was used for parameter identification of three photovoltaic models (single-diode, double-diode, and triple-diode) and three types of photovoltaic modules named Photowatt-PWP201, STM6-40/36, and STP6-120/36 respectively. Experimental results demonstrate that, compared to other algorithms, CSAO provides more accurate and stable parameter identification for photovoltaic cells and modules, along with faster convergence.</p></div>","PeriodicalId":620,"journal":{"name":"Journal of Computational Electronics","volume":"24 3","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143778157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Algebraic patterns, protocols, and pseudocode for a Quine–McCluskey minimization in lieu of the prime implicant chart","authors":"Elizabeth Abraham","doi":"10.1007/s10825-025-02278-6","DOIUrl":"10.1007/s10825-025-02278-6","url":null,"abstract":"<div><p>Digital gates are the basic electronic component of digital circuits. These circuits perform best when they are simplified as this directly leads to reducing the number of digital gates to implement a logical function, thereby reducing the circuit cost. To do this, Boolean expressions need to be optimally minimized. Karnaugh (K-map) and the Quine–McCluskey (Q–M) methods are well-known techniques to simplify Boolean techniques. K-map executions become complex for many valued functions. Comparatively, the Q–M method is a computer-based faster approach for logic function-based simplification. However, the Q–M method becomes intolerable for many valued logical functions along with its computational complexity and intensiveness simultaneously increasing. Hence, in this study an algebraic sum (A-sum) and cross-check sum (CCS) is proposed, primarily to aid in computationally efficient pairing of high numbered groups particularly for many valued logical functions and secondly to check the correctness of the paired groups as a manner to review the sanctity of the paired groups. In addition, broadly six postulates are proposed to forego the prime implicant chart in the Q–M method. In this study, the expounding of the prior through examples show that by reducing the number of computations from that which would be typically required of by the conventional Q–M method, the performance of the Q–M method is increased along with the reduction of the possibility of an error and an accurate minimization. The results can be expanded to an n-numbered logic function leading to more hardware efficient circuits. Moreover, the postulate approach is simpler, more efficient with less effort than with the use of the prime implicant tables. The proposed approach is a useful aid for both academics and industrialists where logic, digital and circuit design takes precedence at optimal performance.</p></div>","PeriodicalId":620,"journal":{"name":"Journal of Computational Electronics","volume":"24 3","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10825-025-02278-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143778158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yunlai Zhu, Junjie Zhang, Xi Sun, Yongjie Zhao, Ying Zhu, Siqi Wang, Jun Wu, Zuyu Xu, Zuheng Wu, Yuehua Dai
{"title":"Effect of filament regimes in the resistive switching behavior of oxide-based complementary memristor","authors":"Yunlai Zhu, Junjie Zhang, Xi Sun, Yongjie Zhao, Ying Zhu, Siqi Wang, Jun Wu, Zuyu Xu, Zuheng Wu, Yuehua Dai","doi":"10.1007/s10825-025-02306-5","DOIUrl":"10.1007/s10825-025-02306-5","url":null,"abstract":"<div><p>Oxide-based complementary memristor, derived from standard bipolar device, offers a promising solution to the challenge of sneak path currents in large-scale crossbar arrays. In this work, we investigate the impact of filament regimes on resistive behavior in tantalum oxide-based complementary memristor through finite element simulations. Our results reveal that the memristor exhibits bipolar resistive switching (BRS) characteristics within a voltage range of (-1.6 V, + 1.6 V) and transitions to a complementary resistive switching (CRS) over a broader voltage range (−1.8 V, + 1.8 V). In the CRS regime, increasing the radius of conductive filament (CF) from 5 to 10 nm and decreasing the CF length from 15 to 7.5 nm can enhance the <i>I</i><sub>on</sub><i>/I</i><sub>off</sub> ratio by 23% and 15%, respectively, due to improved thermal effects. Conversely, reducing the CF radius to 1.2 nm or extending its length to 26 nm diminishes the internal thermal effects, affecting the CF and causing the device to exhibit BRS characteristics. Moreover, decreasing the <i>k</i><sub>th</sub> of electrodes can also improve the <i>I</i><sub>on</sub><i>/I</i><sub>off</sub> of the complementary memristor. This research advances the understanding of the interconversion between BRS and CRS and offers strategies to improve the performance of complementary memristors.</p></div>","PeriodicalId":620,"journal":{"name":"Journal of Computational Electronics","volume":"24 2","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143749031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design of a novel antimony-based solar cell by DFT and SCAPS simulation","authors":"Xiaoyu Yu, Qiaoxia Gao","doi":"10.1007/s10825-025-02308-3","DOIUrl":"10.1007/s10825-025-02308-3","url":null,"abstract":"<div><p>Exploring novel light-harvesting materials with excellent optoelectronic properties is crucial for photovoltaic technology. In this work, we investigate the optoelectronic properties of antimony selenides Na3SbSe4 using first-principles calculations and evaluate their photovoltaic potential by device simulations. The hybrid functionals predict a direct band gap of approximately 1.7 eV and effective masses of 0.549 <i>m</i><sub>0</sub> for electron and 0.591 <i>m</i><sub>0</sub> for hole. The light absorption coefficient is estimated to reach 10<sup>5</sup> cm<sup>−1</sup> in the visible light range. Based on the spectroscopic limited maximum efficiency method, the power conversion efficiency is predicted to approach 19.58% with a thickness of 0.5 µm for light-harvesting material, revealing the excellent photovoltaic properties of Na<sub>3</sub>SbSe<sub>4</sub>. Device simulations further confirm that the solar cell with a device configuration of ZnO/Na<sub>3</sub>SbSe<sub>4</sub>/PEDOT:PSS can achieve an efficiency of 16.45%. Moreover, increasing the thickness of the light-absorbing layer and controlling the defect concentration can improve efficiency. These results can be significant theoretical guidance for the development of novel optoelectronic materials.</p></div>","PeriodicalId":620,"journal":{"name":"Journal of Computational Electronics","volume":"24 2","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143726642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Modelling and simulation of plasma-assisted 2D graphene based solar cells","authors":"Shreya Vasu, Shikha Singh, Suresh C. Sharma","doi":"10.1007/s10825-025-02301-w","DOIUrl":"10.1007/s10825-025-02301-w","url":null,"abstract":"<div><p>A significant photovoltaic material for greater light energy conversion is graphene, mostly due to its exciting features including greater carrier mobility. By substituting a graphene layer for the \"hole transport layer\" (HTL), a perovskite solar cell's efficiency can be increased. This study demonstrates how growing graphene using the plasma-enhanced chemical vapor deposition (PECVD) technique affects the device efficiency. We use SCAPS-1D to build and simulate a model of ITO/PCBM/CsPbI<sub>3</sub>/graphene and use CsPbI<sub>3</sub> as absorber, PCBM as the electron transport layer (ETL) and graphene as the HTL. The efficiency of solar cell and the plasma parameters are found to be numerically related, and the efficiency of the simulated model and the numerically computed efficiency are compared. Furthermore, it is discovered that increasing the electron and ion density of the graphene sheet causes the device's efficiency to decrease due to an inverse relationship with the Debye length, whereas increasing the electron and ion temperatures causes the device's efficiency to increase due to a linear relationship with the Debye length. This indicates that by adjusting the various plasma parameters at an ideal absorber layer and HTL thickness, the device's efficiency can be increased, improving its performance and practical applications. The obtained results have been verified from the previously done researches based on solar cells.</p></div>","PeriodicalId":620,"journal":{"name":"Journal of Computational Electronics","volume":"24 2","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10825-025-02301-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design and performance optimization of a novel perovskite photodetector based on a bipolar heterojunction phototransistor","authors":"Lingyan Lin, Linqin Jiang, Ping Li, Hao Xiong, Shui-Yang Lien, Donyin Chen, Xiaoyuan Lin, Heng Jiang, Baodian Fan, Yu Qiu","doi":"10.1007/s10825-025-02307-4","DOIUrl":"10.1007/s10825-025-02307-4","url":null,"abstract":"<div><p>Perovskite photodetectors have attracted great interest because of their excellent physical properties and the feasibility of low-cost manufacturing by printing processes. Among various types of photodetectors, phototransistors are usually characterized by superior gain due to their inherent amplification function. In the work, an n-SnO<sub>2</sub>/p-CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub>/n-CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> heterojunction bipolar phototransistor is proposed and numerical analyzed with Silvaco TCAD simulator for the first time. The influence of perovskite base and collector doping concentration, base thickness, and SnO<sub>2</sub> emitter doping concentration are investigated to optimize the device performance. The simulation results indicate that properly reducing the perovskite base thickness and doping concentration will greatly enhance the emitter injection efficiency and spectral response. With higher collector doping concentration, the base–collector junction can form a higher electric field, which is conducive to producing a higher spectral response. Moreover, an enhanced emitter injection efficiency can be obtained with a higher SnO<sub>2</sub> emitter doping concentration. Under realistic conditions, the device exhibits excellent performance with a high external quantum efficiency of 1.48 × 10<sup>3</sup>% at 425 nm, a responsivity of 6.8 A/W at 650 nm and a detectivity is 1.63 × 10<sup>14</sup> Jones at 650 nm under a low bias voltage of 0.8 V. Simulation result indicates that the proposed perovskite NPN heterojunction bipolar phototransistor is a promising architecture and will open a new path for the development of high-performance perovskite photodetector.</p></div>","PeriodicalId":620,"journal":{"name":"Journal of Computational Electronics","volume":"24 2","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design and modeling of multi-color absorber based on periodic van der Waals heterostructures including TMDCs","authors":"Hannaneh Dortaj, Samiye Matloub","doi":"10.1007/s10825-025-02304-7","DOIUrl":"10.1007/s10825-025-02304-7","url":null,"abstract":"<div><p>Absorbers based on two-dimensional transition metal dichalcogenide (TMDC) heterostructures with direct band gap have recently attracted great research attention in optoelectronic applications. In this study, we design a multi-color absorber using a multilayer periodic arrangement of van der Waals heterostructures, including different TMDC thin layers (MoSe<sub>2</sub>, MoS<sub>2</sub>, WSe<sub>2</sub>, and WS<sub>2</sub>) on SiO<sub>2</sub> substrate. This newly emerging platform based on different compositions of TMDCs has been investigated to improve light absorption in the visible range. Multi-color detection can be achieved by combining distinct types of TMDCs with different layers. For instance, for two-color absorption, 3-layer-MoS<sub>2</sub> and 1-layer-WSe<sub>2</sub> have been located on the SiO<sub>2</sub> substrate alternatively to form a periodic heterostructure. In this case, the absorption spectrum illustrates two narrow peaks at 520 nm (green) and 700 nm (red) wavelengths. For three-color absorption, 3-layer-WSe<sub>2</sub> and 1-layer-WS<sub>2</sub> have been deposited on SiO<sub>2</sub> substrate alternatively, and the absorption spectrum displays three narrow peaks at 520 nm (green), 610 nm (orange), and 710 nm (red) wavelengths. Effects of the number of periods and the number of TMDC layers on the absorption spectrum have been investigated. As a result, the utilization of the periodic form of multilayer TMDCs demonstrates a high absorption peak of approximately 40% for distinct wavelengths within the visible range. This property can be employed in various optoelectronic devices and visible light communication.</p></div>","PeriodicalId":620,"journal":{"name":"Journal of Computational Electronics","volume":"24 2","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143655423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fen Li, Xiong-Fei Zhang, Ju-Qi Ruan, Yi-Fen Zhao, Kai Xiong, Yao He, Qing-Yuan Chen
{"title":"Engineering the structural, electronic, and optical properties of the novel monolayer photoelectric semiconductor C2/m-SnX (X = P, as) via strain: a first-principles study","authors":"Fen Li, Xiong-Fei Zhang, Ju-Qi Ruan, Yi-Fen Zhao, Kai Xiong, Yao He, Qing-Yuan Chen","doi":"10.1007/s10825-025-02302-9","DOIUrl":"10.1007/s10825-025-02302-9","url":null,"abstract":"<div><p>Driven by their outstanding optoelectronic properties, two-dimensional (2D) materials have attracted significant attention in solar cells, LEDs, and other optoelectronic fields. Besides, the strain effect has served as a powerful approach to enhance the optoelectronic performance of 2D materials. This study employs first-principles calculations to investigate the tunable optoelectronic properties of monolayer <i>C</i>2/<i>m</i>-SnX (X = P, As) materials under uniaxial/biaxial strains ranging from -10% to 10%. The results demonstrate that under uniaxial/biaxial strains ranging from -10% to 10%, the structure of <i>C</i>2/<i>m</i>-SnX (X = P, As) maintains good stability. Their electronic and optical properties can uphold semiconductive characteristics unchanged across the entire strain conditions. Under different strains, their mechanical and optical properties are anisotropic. All of the outcomes above attest to their favorable flexibility. In addition, their mechanical, electronic, and optical properties display different and regular patterns of change under the modulation of various strains. In our opinion, this study not only validates the potential of <i>C</i>2/<i>m</i>-SnX as a strain-tunable flexible semiconductor but also furnishes a theoretical basis and directive for the future application in practice, where the application of strain can enable targeted regulation of its mechanical and optoelectronics properties, thus transforming and broadening its performance manifestations.</p></div>","PeriodicalId":620,"journal":{"name":"Journal of Computational Electronics","volume":"24 2","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design and analysis of novel D–π–A configuration dyes for dye-sensitized solar cells: a density functional theory study","authors":"Bahaa A. Al-Fatlawe, Faeq A. AL-Temimei","doi":"10.1007/s10825-025-02303-8","DOIUrl":"10.1007/s10825-025-02303-8","url":null,"abstract":"<div><p>This study explores the electronic, optical, and electrochemical properties of novel D–π–A organic dyes with different π-bridges using DFT and TD-DFT calculations, emphasizing their potential as efficient light harvesters. Geometric analysis shows that the dyes’ bond lengths and dihedral angles support intramolecular charge transfer, light absorption, and stability. The <i>π</i>-bridge improves electronic coupling, promoting conjugation and electron mobility. Frontier molecular orbital analysis reveals HOMO and LUMO levels aligned with TiO<sub>2</sub> conduction band and the electrolyte's redox potential, ensuring efficient electron injection and dye regeneration. The dyes’ energy gaps (2.1151–2.5426 eV) enable effective visible-light absorption. Molecular orbital distribution supports charge separation for efficient donor-to-acceptor electron transfer. Global reactivity parameters indicate high stability and enhanced charge transfer capabilities. Molecular electrostatic potential and reduced density gradient analyses highlight charge distribution and non-covalent interactions that improve stability and electronic properties. UV–Vis spectra (543.021–624.762 nm) reveal enhanced light-harvesting efficiency via n → <i>π</i>* transitions enabled by the <i>π</i>-bridge. Electrochemical parameters, including oxidation potential and free energy changes, confirm their suitability for DSSCs. These dyes demonstrate significant potential for renewable energy applications, particularly in DSSCs.</p></div>","PeriodicalId":620,"journal":{"name":"Journal of Computational Electronics","volume":"24 2","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143638360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}