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Effects of Matching Short current Density for Dual Junction Lead Salts TPV Device at 1400 C

Effects of Matching Short Current Density for Dual Junction ...

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2022 International conference on Electrical and Computing Technologies and Applications, ICECTA 2022

作者： Khodr, Majed Mccann, Patrick American University of Ras Alkhaimah Electrical and Electronics Departmnet Ras Al Khaimah United Arab Emirates University of Oklahoma Electrical and Computer Engineering NormanOK United States

ISBN: (数字)9781665456005

ISBN: (纸本)9781665456005

Thermophotovoltaic (TPV) device that can be efficiently used to convert thermally stored energy in molted silicon at 1400 C0 cells to electrical energy has been studied. The device utilizes Pb0.8 Sr0.2 Se/ Pb0.81 Sn0.19 Se /Pb0.8 Sr0.2 Se IV-vi material in a multiple quantum well configuration two junction device structure. Using quantum well calculations and including strain effects the interband optical transition energy gaps (well widths) were calculated to be 450 meV(3.5nm), and 343 meV(4.9nm), for the top and bottom junctions, respectively. We calculated the short current density, output electric power density and efficiency for each junction as a function of device thickness. The overall maximum electric power density and efficiency for the device was 3.46 W/cm2 and 26.7% at device thickness of 6.0 μm;however the short current density for both junctions was not matched. In order to do this and stabilize the device performance, we optimized the junction layers n and p thickness values. As a result, the device maximum output electrical power and efficiency dropped to 3.05 W/cm2 and 16.89% at device thickness values of 3.65 and 9.95 μm. At these values, the matched short circuit current density is 11.55 A/cm2. It is shown that multiple quantum well single junction design for the above material system suffice to obtain better efficiency and output electric power compared to designs using the same bulk material system. © 2022 IEEE.

关键词： Semiconductor quantum wells

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Analytic formulation of a spherochromatic collimator lens 11

Analytic formulation of a spherochromatic collimator lens

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conference on current developments in Lens design and optical engineering XXI

作者： Gonzalez-Acuna, Rafael G. Gutierrez-Vega, Julio C. Tecnol Monterrey Photon & Math Opt Grp Monterrey Mexico

We introduce a closed-form formula to design a spherochromatic collimator singlet lens. The light for three different wavelengths is collimated at the output of the lens. We test the singlet lens using ray-tracing met... 详细信息

ISBN: (数字)9781510637719

ISBN: (纸本)9781510637719

关键词： optical design aspheric collimator

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Enhancing the Efficiency of (CH3NH3)2CuCl4-based Perovskite Solar Cells by Selecting a Suitable Electron Transport Layer

Enhancing the Efficiency of (CH3NH3)2CuCl4-based Perovskite ...

引用

International conference on Electrical, Computer and Communication engineering (ECCE)

作者： Asadul Islam Shimul Swarna Rani Sarker Md Maruf Hossain Subir Kumar Ghosh Md Jannatul Naime Safia Aktar Dipa Department of Electrical and Electronic Engineering Bangabandhu Sheikh Mujibur Rahman Science and Technology University Gopalganj Bangladesh Department of Electrical Engineering and Computer Science University of Missouri Columbia MO USA

ISBN: (数字)9798350357509

ISBN: (纸本)9798350357516

The compound (CH 3 NH 3 ) 2 CuCl 4 demonstrates exceptional electrical and optical characteristics, positioning it as a viable candidate for solar cell device, with the potential to enhance efficiency and reduce manufacturing expenses. This research examines the ideal device architecture utilizing a configuration of FTO/ETL/(CH 3 NH 3 ) 2 CuCl 4 /HTL/Au, assessed with the SCAPS-1D simulator. Six electron transport layers (ETLs) and one hole transport layer (HTL) were evaluated, with essential device parameters, including thickness, temperature, interface defect, doping density, and defect density, meticulously tuned to improve device performance. The optimized device configuration, FTO/WS 2 /(CH 3 NH 3 ) 2 CuCl 4 /CuSCN/Au, demonstrated exceptional performance compared to the tested ETL materials (IGZO, PCBM, SnO 2 , WS 2 , ZnO, and ZnSe), achieving a power conversion efficiency (PCE) of 33.35%, a short circuit current density (J SC ) of 37.77 mA/cm 2 , an open circuit voltage (V OC ) of 1.0 V, and a fill factor (FF) of 87.65%. This advanced perovskite solar cell design highlights (CH 3 NH 3 ) 2 CuCl 4 as a viable choice for next-generation solar energy applications, providing enhanced efficiency with less toxicity relative to traditional thin-film solar cells.

关键词： Performance evaluation Toxicology II-vi semiconductor materials Photovoltaic cells Space technology Voltage Zinc oxide Perovskites Topology Electrons

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The entrance pupil of an on-axis stigmatic singlet lens 11

The entrance pupil of an on-axis stigmatic singlet lens

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conference on current developments in Lens design and optical engineering XXI

作者： Gonzalez-Acuna, Rafael G. Gutierrez-Vega, Julio C. Tecnol Monterrey Photon & Math Opt Grp Monterrey 64849 Mexico

We derive a closed-form expression for the entrance pupil of the on-axis stigmatic singlet lens, and discuss its performance for a variety of conditions, including positive or negative indices of refraction, and diffe... 详细信息

ISBN: (数字)9781510637719

ISBN: (纸本)9781510637719

关键词： optical design spherical aberration telescopes aberration theory

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Higher education supply chain: a descriptive paper on the suggested analogy 3

Higher education supply chain: a descriptive paper on the su...

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3rd International conference on Innovative Research in Applied Science, engineering and Technology, IRASET 2023

作者： Hind, Bouhassoun Nicolas, Cheimanoff Mohammed Vi Polytechnic University Emines Ben Guerir Morocco

ISBN: (纸本)9798350398366

Managers of higher education institutes (HEIs) are facing constant challenges and are urged to make decisions faster and more frequently in an ecosystem that is continuously changing and in an environment that is complex. Education has known many evolutions: recently, after the pandemic, in the Industry 4.0 era, and previously, following the industrial revolution. The need for an educated mass of workers progressed to further diverse needs with specifications that employers demand. Therefore, on a strategic level, leaders in higher education (HE) establish visions, build their HEIs' missions and target a certain position on the HE map. In a tactical sense, they plan the HEI's activity, taking into consideration the characteristics of the ecosystem and the volatile, uncertain, complex and ambiguous environment. Considering these difficulties, the authors propose the adaption of business management and more specifically, supply chain management (SCM), theory and practice, to design HE as a service supply chain that targets an enhanced quality and demonstrates better performance. Following a study of the literature, this paper suggests building a higher education supply chain (HESC) analogy, i.e. the construct. The resulting design is expected to serve as a basis for future more visual work that uncovers a HEI's current state, which exposes incoherence and hence, creates opportunities for improvement in an integrated and coordinated HESC. © 2023 IEEE.

关键词： Ecosystems

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Optimization of a mobile phone camera for as-built performance 11

Optimization of a mobile phone camera for as-built performan...

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conference on current developments in Lens design and optical engineering XXI

作者： Joo, Joonha Alisafaee, Hossein Rose Hulman Inst Technol Dept Phys & Opt Engn 5500 Wabash Ave Terre Haute IN 47803 USA

ISBN: (数字)9781510637719

ISBN: (纸本)9781510637719

The work presented here shows a compact lens system that demonstrates improved imaging quality performance while focusing on as-built performance and design for manufacturing. Using Zemax, we consider an approach for optimizing for as-built performance and incorporate the approach into the design process for a mobile phone camera. The optimized design consists of 6 plastic aspheric lenses, an infrared glass filter, and a 12 MP CMOS image sensor. The optical system demonstrates high-resolution imaging and has a field-of-view of 87.6 degrees, an F-number of 2.0, a maximum distortion of less than 2.5%, and a total track length of 6.630 mm.

关键词： optical design Optimization Tolerancing design for manufacturing Zemax

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optical design of triple-mode seeker 11

Optical design of triple-mode seeker

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conference on current developments in Lens design and optical engineering XXI

作者： Sakarya, Dogan Ugur Kucukcelebi, Doruk Tact Missile Syst Grp TR-06780 Roketsan Elmadag Ankara Turkey

ISBN: (数字)9781510637719

ISBN: (纸本)9781510637719

In missile applications, new counter measure methods are getting more complex. To discriminate and detect counter measure and to understand target signature from scene is getting harder. Because of all that concerns, using triple-mode seeker for a system solution is a good solution for system total performance. By this way, tri-different wavelength could be used for same system and same scene. In this study, triple mode system's optical designs have been made for mid-wave infra-red imaging, long-wave infra-red imaging and short-wave infrared imaging. optical designs performances have been illustrated in simulation results. Finally, conceptual design of triple mode seeker will be summarized.

关键词： Triple mode seeker mid wave infrared long wave infrared short wave infrared optical design

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Comparison of passive athermalization results of LWIR optical designs utilizing different infrared optical materials 11

Comparison of passive athermalization results of LWIR optica...

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conference on current developments in Lens design and optical engineering XXI

作者： Kucukcelebi, Doruk Sakarya, Dogan Ugur Kemalpasa Mahallesi Sehit Yuzbasi Adem Kutlu TR-06780 Ankara Turkey

ISBN: (数字)9781510637719

ISBN: (纸本)9781510637719

In this paper, different optical designs, which are composed of different LWIR optical materials, are utilized for passive athermalization and their performance in athermalization are analyzed. The optical designs are carried out by preserving the athermal property as well as keeping the image quality at higher levels within the working temperature between -40 degrees C and +60 degrees C. Our designs consist of two different infrared optical elements to maintain the focus positions as stable as possible within the working temperature. The passive athermalization process begins with the calculation of athermalization conditions of candidate material properties. By taking into account these conditions, athermal material pairs are chosen. The optical design begins with an optimization process using paraxial optics. In order to reduce aberrations such as coma, astigmatism, spherical and chromatic, aspherical surfaces are utilized during the optimization process. At the end of the design phase, the performance of different configurations of athermal optical material pairs, which are enclosed by aluminum alloy housing material, are presented.

关键词： Athermalization infrared optical design two-element optical material pair Long Wave Infrared (LWIR)

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design of an anastigmatic three-mirror telescope using freeform surfaces 11

Design of an anastigmatic three-mirror telescope using freef...

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conference on current developments in Lens design and optical engineering XXI

作者： Alvarado-Martinez, J. J. Granados-Agustin, F. S. Vazquez-y Montiel, S. Cornejo-Rodriguez, A. A. INAOE Luis Enrique Erro 1 Sta Maria Tonanzintla Cholula Pue Mexico UIEPA Los Ilanos Kilometro 1 San Andres Tlayehualanci Ahuacatlan Pue Mexico

ISBN: (数字)9781510637719

ISBN: (纸本)9781510637719

This paper proposes the design of an anastigmatic three-mirror telescope using freeform surfaces for the correction of spherical aberration, coma, astigmatism, and field curvature, allowing a wide field of view (FOV) and high resolution. For the structure of this telescope, it is proposed to use only two optical elements where the primary and tertiary mirrors are integrated into an only optical element and the secondary mirror in the other, thus achieving a considerable reduction in the difficulty of alignment and assembly. To achieve a high performance of the telescope, the system was decentered (off-axis design), avoiding the loss of energy due to the obscuration of the M-2 in the on-axis system. In addition, to solve the difficult access to the focus.

关键词： optical design three-mirror system freeform on-axis system off-axis system

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Distortion controlled optical design using orthogonal surface polynomials 11

Distortion controlled optical design using orthogonal surfac...

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conference on current developments in Lens design and optical engineering XXI

作者： Allain, Guillaume Thibault, Simon Ctr Opt Photon & Laser Quebec City PQ Canada Univ Laval Dept Phys Genie Phys & Opt Quebec City PQ Canada

ISBN: (数字)9781510637719

ISBN: (纸本)9781510637719

The design of high quality very wide-angle optical systems (FFOV > 100 degrees) relies on distortion to obtain a sufficient resolution at, usually, the center of the field of view. Using distortion shape as a parameter during optimization to reach a magnification target is a common technique to achieve optical foveation during the lens design process. This method allows resolution enhancement at selected parts of the field of view since less care is given to parts of the image that are deemed less important. However, accurate control of distortion can be a challenge during optical design since the standard aspherics polynomials don't correlate directly to image magnification. This may in fact slow down optimization since the merit function is much less optimized to approach a solution. In this paper, we address this problem by presenting a method to simplify distortion control during the optical design phase. To achieve this, the use of orthogonal polynomials is used for defining the optical surface shape and will then be used to compare the height of the image plane at a given field of view. We show that in the case of simple and paraxial system, this process is orthogonal and achieve a solution in a single optimization step. We will finally discuss the limits of this method and how it applies to modern lens design problems.

关键词： optical design Foveated imaging Distortion Control Orthogonal polynomials Shape specification

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