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A Study on the Efficiency Gain of CsSnGeI₃ Solar Cells with Graphene Doping

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World Journal of Condensed matter Physics 2023年第3期13卷 90-104页

作者： mohammed m. Shabat Guillaume zoppi Department of Physics The Islamic University of Gaza Gaza Strip Palestine Department of mathematics Physics & Electrical Engineering Northumbria University Newcastle upon Tyne UK

This paper presents a newly designed ultra-thin, lead-free, and all-inorganic solar cell structure. The structure was optimized using the SCAPS-1D simulator, incorporating solid-state layers arranged as n-graphene/CsSnGeI3/p-graphene. The objective was to investigate the potential of utilizing n-graphene as the electron transport layer and p-graphene as the hole transport layer to achieve maximum power conversion efficiency. Various materials for the electron transport layer were evaluated. The optimized cell structure achieved a maximum power conversion efficiency of 20.97%. The proposed solar cell structure demonstrates promising potential as an efficient, inorganic photovoltaic device. These findings provide important insights for developing and optimizing inorganic photovoltaic cells based on CsSnGeI3, with n-graphene electron transport layers and p-graphene hole transport layers.

关键词： Perovskite Solar Cells Efficiency Gain CsSnGeI3 Solar Cells Graphene Doping Photovoltaics Thin-Film Solar Cells Energy Conversion

Antireflection Coating for Solar Cells Based on Graded-Index materials

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Journal of Applied mathematics and Physics 2023年第5期11卷 1414-1428页

作者： Yousef m. A. Adwan mohammed m. Shabat Guillaume zoppi Department of Physics The Islamic University of Gaza Gaza Strip Palestine Department of mathematics Physics and Electrical Engineering Northumbria University Newcastle upon Tyne United Kingdom

The conversion of sunlight into electricity via photovoltaics presents tremendous opportunities for the generation of renewable energy. However, solar cells still face several challenges and limitations to further reduce manufacturing costs and increase module efficiency. Photon management is paramount to increase the efficiency of the mainstream silicon-based cell and always includes a suitable antireflection coating (ARC) structure to decrease the reflectance (R) at the top surface. We propose a novel triple-layer anti-reflective coating (TLAR) consisting of three layers sandwiched between the upper cover (glass) and the substrate (silicon). The inner three layers are graded refractive index material (GIm) as an active layer, titanium dioxide (TiO2), and zinc sulfide (ZnS), respectively. The optical properties of the TLAR have been investigated using the transfer matrix method (Tmm). The results of using GIm as the active medium lead to the reflection decaying to the minimum value, and the transmittance reaching the maximum values at a specific wavelength range. The proposed triple-layer anti-reflective coating (TLAR) structure presents a promising solution for enhancing the efficiency of solar cells. Its unique design and utilization of graded refractive index material (GIm) as the active layer make it a novel and innovative approach that holds great potential for advancing solar cell technology.

关键词： Solar Cell Transfer matrix method Transmission Reflection and Quantum Efficiency ARC

Analyzing and Exploring a model for High-Efficiency Perovskite Solar Cells

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Energy and Power Engineering 2023年第8期15卷 265-276页

作者： mohammed m. Shabat mahassen H. Elblbeisi Guillaume zoppi Department of Physics Islamic University of Gaza Gaza Palestine Department of mathematics Physics & Electrical Engineering Northumbria University Newcastle Upon Tyne UK

Perovskite materials have drawn a lot of interest recently due to their potential to increase solar cell efficiency. This study uses the solar cell capacitance simulator (SCAPS-1D) to develop and simulate a perovskite solar cell made of semiconductor materials. The design that has been suggested is Al:ZnO/ZnO/CdS/CsSnCl3 and moS2. The analysis focuses on how different characteristics of the material affect the device’s performance. The analysis of the data reveals that the architecture had 26.15% power conversion efficiency (PCE). The solar cell creates an interest in developing a non-toxic solar cell with low manufacturing costs, outstanding conversion efficiency, and stability.

关键词： Perovskite Solar Cell High Efficiency CSSnCl3 Electrical Properties SCAPS

Analytic Differential Kinematics of Tetrahedral mechanisms

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Analytic Differential Kinematics of Tetrahedral Mechanisms

Storylines of family medicine Ⅱ:foundational building blocks—context,community and health

第十五届中国机构与机器科学国际学术会议

作者： m.tteo zoppi Rezia m. molfino PmARlab University of Genova via Opera pia 15A 16145GenovaItaly. PmARlab University of Genova via Opera pia 15A 16145GenovaItaly.

＜正＞The paper proposes an analytical formulation for the first and second-order, forward differential kinematics of the tetrahedral mechanisms, a class of 3dof, translational parallel architectures. This class gathers some well known architectures of practical interest, e.g., the 3UPU, the 3RUU and the 3PUU architectures assembled to be purely translational. The standard method to compute the end-effector velocity and acceleration of some tetrahedral mechanisms consists of deriving the loop-closure equations one/two times in the time variable, in order to obtain new systems of equations in the unknown components of the end-effector velocity/acceleration, aztd solving again. The present paper provides the analytical and fully parametric expressions of such solutions. In particular, Jacobian and Hessian are obtained. The expressions proposed can provide useful insights for the design of tetrahedral mechanisms and can be used in robot control.

关键词： Translational parallel mechanisms Tetrahedral mechanisms Differential kinematics Jacobian Hessian

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Family medicine and Community Health 2024年第S03期12卷 12-22页

作者： William B Ventres Leslie A Stone Rupal Shah Tamala Carter Geoffrey m Gusoff Winston Liaw Bich-may Nguyen Joanna V Rachelson mary Alice Scott Teresa L Schiff-Elfalan Seiji Yamada Robert C Like Kathleen zoppi A Peter Catinella Richard m Frankel Shailendra Prasad Family and Preventive medicine University of Arkansas for Medical Sciences College of MedicineLittle RockArkansasUSA Bridge Lane Group Practice LondonUK Penn Center for Community Health Workers University of PennsylvaniaPhiladelphiaPennsylvaniaUSA National Clinician Scholars Program UCLA David Geffen School of MedicineLos AngelesCaliforniaUSA Health Systems and Population Health Sciences University of Houston Tilman J Fertitta Family College of MedicineHoustonTexasUSA Southern New mexico Family medicine Residency Program Las CrucesNew MexicoUSA New mexico Primary Care Training Program Silver CityNew MexicoUSA Anthropology New Mexico State UniversityLas CrucesNew MexicoUSA Family medicine and Community Health University of Hawai'i at Manoa John A Burns School of MedicineHonoluluHawaiiUSA Family medicine and Community Health Rutgers Robert Wood Johnson Medical SchoolNew BrunswickNew JerseyUSA Family medicine Indiana University School of MedicineIndianapolisIndianaUSA Family medicine–Transmountain Texas Tech University Health Sciences CenterEl PasoTexasUSA medicine Indiana University School of MedicineIndianapolisIndianaUSA Family medicine and Community Health University of Minnesota Medical School-Twin Cities CampusMinneapolisMinnesotaUSA

Storylines of Family medicine is a 12-part series of thematically linked mini-essays with accompanying illustrations that explore the many dimensions of family medicine,as interpreted by individual family physicians and medical educators in the USA and elsewhere around the ***‘Ⅱ:foundational building blocks—context,community and health’,authors address the following themes:‘Context—grounding family medicine in time,place and being’,‘Recentring community’,‘Community-oriented primary care’,‘Embeddedness in practice’,‘The meaning of health’,‘Disease,illness and sickness—core concepts’,‘The biopsychosocial model’,‘The biopsychosocial approach’and‘Family medicine as social medicine.’may readers grasp new implications for medical education and practice in these essays.

关键词： thematic illustration dimensions