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2023 IEEE Renewable Energy and Sustainable E-Mobility Conference, RESEM 2023

作者： Kaur, Navdeep Madan, Jaya Pandey, Rahul Chitkara University Institute of Engineering and Technology Chitkara University Vlsi Centre of Excellence Punjab 140401 India

ISBN: (纸本)9798350311327

In current era of green energy, technology is shifting toward usability of solar energy. Among the popularly used semiconductor materials in photovoltaic devices, perovskite material has been investigated on large scale due to its excellent optical performance. The photovoltaic performance (Pv) of perovskite-based solar cells (PSC) has demonstrated exceptional performance in solar cell. Hybrid perovskite material possess high carrier life time, absorption co-efficient and diffusion length. In addition, it has feasibility to tune bandgaps to absorb different wavelengths. However, lead present in hybrid perovskite compounds is hazardous for environment. Also presence of organic cation is the main cause of thermal instability in hybrid perovskite. This study primarily aims to explore all inorganic halide perovskites (IHP) in photovoltaic cell. Due to outstanding optical performance and thermal stability of IHP materials, interest of researchers is shifting toward this material. The proposed design uses a low-lead IHP CsPb0.625Zn0.375I2Br, in the active layer of PSC structure. The device structure has simulated using simulator SCAPS-1D to verify the impact of interface defect density (IDD) at TiO2/ CsPb0.625Zn0.375I2Br and CsPb0.625Zn0.375I2Br / Spiro-MeOTAD interface. The IDD is varied in 7 logarithmic steps (1012 cm-2 - 1018 cm-2). Obtained results indicate the degradation in photovoltaic performance with increase in IDD. It has been noticed from the simulated results that power conversion efficiency (PCE) 22.96% to 16.58% with increase in IDD. The same impact is also observed on short circuit current density (JSC), open circuit voltage (vOC) and fill factor (FF), it decreases from 35.03 mA/cm2 to 33.88 mA/cm2, 0.80 v to 0.61 v and 83.55 % to 79.92 % respectively. © 2023 IEEE.

关键词： Perovskite

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Adjoint-Assisted Shape Optimization of Microlenses for CMOS Image Sensors

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SENSORS 2024年第23期24卷 7693页

作者： Arfin, Rishad Niegemann, Jens Mcguire, Dylan Bakr, Mohamed H. McMaster Univ Dept Elect & Comp Engn Hamilton ON L8S 4K1 Canada Ansys Canada Ltd 1700-1095 West Pender St Vancouver BC V6E 2M6 Canada

Recently, there have been significant developments in the designs of CMOS image sensors to achieve high-resolution sensing capabilities. One of the fundamental factors determining the sensor's ability to capture high-resolution images is its efficiency in focusing the visible light onto the photosensitive region of the submicron scale. In most CMOS imaging technologies, this is typically achieved through microlenses. Light collection under diverse conditions can be significantly improved through the efficient design of microlenses. While the optimization of microlenses appears to be imperative, achieving efficient designs of microlenses for high-density pixels under various conditions remains a significant challenge. Therefore, a systematic optimization approach is required to accelerate the development of efficient microlenses with enhanced optical performance. In this paper, we present an approach to optimize the shape of CMOS microlenses through adjoint sensitivity analysis (ASA). A novel figure of merit (FOM) is developed and incorporated into the optimization process to enhance the light collection. The gradient of the FOM is computed iteratively using two field simulations only. The functionality and robustness of the optimization framework are thoroughly evaluated. Furthermore, the performance of the optimized CMOS microlenses is compared to that of the conventional microlenses. The adjoint-assisted optimization framework presented here can be further used to develop efficient optical devices that perform optical manipulation such as concentrating, bending, or dispersing light in compact imaging systems.

关键词： adjoint sensitivity analysis (ASA) optimization microlenses CMOS image sensor

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design insights into (FA)2BiCuI6 based double perovskite solar cells employing different charge transport layers

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optical and Quantum Electronics 2024年第10期56卷 1-22页

作者： Yadav, Shivangi Lohia, Pooja Sahu, Anupam Dwivedi, D.K. Department of Electronics and Communication Engineering Madan Mohan Malaviya University of Technology Gorakhpur273010 India Department of Physics and Material Science Photonics and Photovoltaic Research Lab Madan Mohan Malviya University of Technology Gorakhpur273010 India

The non-toxic and organic–inorganic double perovskite material (FA)2BiCuI6, has garnered significant curiosity as a double perovskites solar cell (DPSC) absorber layer owing to its exceptional optoelectronic characteristics, making it well-suited for photovoltaic (Pv) applications. To assess the viability of (FA)2BiCuI6 as a prospective material for the solar cell absorption layer, the SCAPS-1D simulation tool is used to explore the optimal configuration of solar cell involving the different electron transport layer (ETL) and hole transport layer (HTL). ETLs such as PCBM, Ag2S, ZnO0.3S0.7, C60, Nb2O5, and ZnSe, along with HTLs like Mg-CuCrO2, CBTS, CFTS, GO, SWCNT, and CuI, are thoroughly considered for integration with the absorber layer. Each ETL is methodically examined in combination with each HTL to identify the optimal pairing with (FA)2BiCuI6. This analysis leads to the identification of a champion DPSC configuration, which is then further optimized to achieve higher efficiency. The champion device structured as FTO/Nb2O5/(FA)2BiCuI6/Mg-CuCrO2/Se demonstrates highest power conversion efficiency approximately 24.42%, open-circuit voltage = 1.077 v, short-circuit current density = 26.03 mA/cm2 and fill factor of 87.12% are observed after optimization of various solar cell parameters. This proposed configuration aims to optimize light absorption, charge carrier transport, and extraction efficiency to achieve high solar cell performance. This work proposes the most suitable DPSC configurations for Pv applications, analysing on the basis of variables such as absorber layer thickness, shallow acceptor density, defect density, and interfacial defect density. Additionally, the investigation delves into the influence of series and shunt resistances on proposed DPSC structures. To gain deeper insights, the analysis incorporates Jv curves and quantum efficiency plots for the proposed champion configuration. Device performance is stable with temperature at 300 K. © The A

关键词： Perovskite

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Performance Analysis of Improved Linear Sinusoidal Tracer Controlled Single-Stage and Dual-Stage Three-Phase Grid-Tied Pv System

Performance Analysis of Improved Linear Sinusoidal Tracer Co...

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Smart and Sustainable developments in Electrical engineering (SSDEE), IEEE International Conference on

作者： Urvashiben Rathod Darsh v. Pawar Siddharthsingh K. Chauhan Abhisek Parida P. N. Tekwani Dept. of Electrical Engineering Institute of Technology Nirma University Ahmedabad India

ISBN: (数字)9798331542108

ISBN: (纸本)9798331542115

This paper compares single-stage and dual-stage Improved Linear Sinusoidal Tracer (ILST) based three-phase grid-tied photovoltaic (Pv) systems. These systems facilitate the integration of solar energy into grid while improving the power quality of the distribution network. This design incorporates Maximum Power Point Tracking (MPPT), Pv power injection into the grid, harmonic reduction at the Point of Common Coupling (PCC), and grid current balancing. Both single-stage and dual-stage configurations utilize a three-phase voltage source converter (vSC) controlled by an ILST algorithm. The single-stage and dual-stage systems are modeled and simulated using MATLAB. This ILST control algorithm of grid-tied Pv system helps to maintain Total Harmonic Distortion (THD) of PCC voltages and grid currents within prescribed limits.

关键词： Maximum power point trackers Transient response Total harmonic distortion Power quality Power system harmonics Harmonic analysis voltage control MATLAB Sustainable development voltage-source converters

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Radiation modeling of microplasma Uv lamps for design analysis and optimization

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JOURNAL OF ENvIRONMENTAL CHEMICAL engineering 2023年第3期11卷 110040页

作者： Montazeri, Mahyar Mohaghegh Raeiszadeh, Milad Taghipour, Fariborz Univ British Columbia Dept Chem & Biol Engn 2360 East Mall Vancouver BC V6T 1Z3 Canada

Microplasma Uv lamps have recently emerged as viable excimer-based sources of Uv radiation, garnering significant attention during the recent COvID-19 pandemic for their use in disinfection applications because of their ability to emit human-safe far-UvC (200-240 nm) spectrums. An accurate model to simulate the radiation profile of microplasma Uv lamps is of paramount importance to develop efficient microplasma lamp-implemented systems. We developed a 3D numerical model of microplasma Uv lamps using the ray optics method. The simulation results for lamp irradiance and fluence rate were experimentally validated with standard optical radiometry and actinometry measurements, respectively. To improve the optical efficiency of microplasma lamps, an in-depth analysis of radiation behavior inside the standard commercially available lamp was performed using the geometrical optics method, and several potential scenarios were explored. A 2D modeling of an individual microcavity indicated that the current common lamp design can be significantly improved by preventing radiation loss, and small modifications in optical design can greatly increase the energy performance of the system. Based on the findings of this study, several virtual design concepts were proposed, and their performances were numerically compared with that of the original design of commercial microplasma lamps. The developed model can potentially be integrated with hydrodynamic and kinetic models for the virtual prototyping of complex photoreactors operating with Uv microplasma lamps.

关键词： Microplasma Ultraviolet Numerical modeling virtual prototyping Geometrical optics Far-UvC

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design and Analysis of optical Wireless Communication Systems

Design and Analysis of Optical Wireless Communication System...

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Smart Electronics and Communication (ICOSEC), International Conference on

作者： K. Kannan A. Jagadesan G. Karthika Hemant Singh Pokhariya S. Kaliappan K. v. Kanimozhi Department of Electronics and Communication Engineering R.M.K. College of Engineering and Technology Chennai Tamil Nadu India Department of Physics R.M.K Engineering College Kavaraipettai Tamil Nadu India Department of Electronics and Communication Engineering R.M.D. Engineering College Kavaraipettai Tamil Nadu India Department of Computer Science and Engineering Graphic Era Deemed to be University Dehradun Uttarakhand India Division of Research and Development Lovely Professional University Phagwara Punjab India Department of Computer Science and Engineering Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences Chennai Tamil Nadu India

The design and implementation of Underwater Wireless optical Communication (UWOC) provide important scientific problems. UWOC has the ability to transmit data at a high pace across long distances. This essay makes an effort to concentrate on the complexity of real-world applications and unresolved problems in UWOC systems. The key developments and advancements in the subject, modelling methods, and connection design difficulties are outlined. The goal of this study is to provide recommendations for a practical and trustworthy UWOC design with enhanced performance. Finally, a summary of the key aspects is provided to aid in future UWOC study.

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optical Sensor with Frequency Output Based on Resonant Tunneling Diode 16

Optical Sensor with Frequency Output Based on Resonant Tunne...

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16th IEEE International Conference on Advanced Trends in Radioelectronics, Telecommunications and Computer engineering, TCSET 2022

作者： Osadchuk, Iaroslav A. Osadchuk, Oleksandr v. Osadchuk, vladimir S. Semenov, Andriy O. Vinnytsia National Technical University Dept. of Radio-Frequency Engineering Vinnytsia Ukraine

ISBN: (纸本)9781665468619

The paper shows the possibility of using a resonant tunneling diode as an optical sensor with a frequency output signal. The resonant tunneling diode was created on the basis of a quantum two-barrier heterostructure, which characterizes the existence of a negative differential resistance in the diode and its microwave properties in the entire radio frequency range. The diode acts both as a primary optical power sensor and as a microwave self-oscillator with an external oscillating LC system, where L and C are the equivalent inductance and equivalent capacitance of the oscillatory system. This greatly simplifies the design of the optical sensor. Using the principle of conversion 'optical signal - frequency' can significantly improve the metrological performance of the device. A study of the characteristics of an optical sensor based on its equivalent circuit, which takes into account its inductive and capacitive properties, has been carried out. The current-voltage characteristic has a descending section, causes the appearance of a negative differential resistance, which compensates for energy losses in the oscillatory system of the sensor's self-oscillator. The mathematical model of the sensor is based on the Kirchhoff equations describing the behavior of its equivalent circuit. Analytical dependences of the change in sensor parameters on the effect of optical power on it, as well as the transformation and sensitivity functions, are obtained. It is shown that the main contribution to changes in the conversion functions and sensitivity of the sensor is made by the change in the negative differential resistance under the influence of optical power. This results in a shift in the instrument's output frequency. The sensitivity of the sensor varied from 4.710optical {Hz}{mW} to 7.410optical{Hz}{mW} in the optical power change range from 1 mW to 10 mW. © 2022 IEEE.

关键词： Resonant tunneling diodes

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design of InGaAs p-i-n Photo-detectors Prepared on Misoriented Si Substrates

Design of InGaAs p-i-n Photo-detectors Prepared on Misorient...

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2023 International Conference on Optoelectronic Information and Functional Materials, OIFM 2023

作者： Wang, Guosheng Ke, Zungui Yao, Mengqi Dai, Qian Yang, Ruiyu Pan, Xu Xie, Xiumin Southwest Institute of Technical Physics Chengdu610041 China

ISBN: (纸本)9781510668119

InGaAs-based p-i-n photo-detectors (PDs) on misoriented Si and conventional Si substrates are both designed, fabricated, and characterized. It is found that the as-grown PD structure on misoriented Si substrate has lower dislocation density than on conventional Si substrate. The PD fabricated on misoriented Si substrate shows a low dark-current of 83nA under −5 v, a zero bias voltage responsivity of 0.58 A/W at 1550 nm, the corresponding quantum efficiency is 46%. The darkcuurent and quantum efficiency at 1550 nm, of the PD on misoriented Si substrate, is about over one orders of magnitude lower and 70% higher respectively, than the comparison PD fabricated on conventional Si substrate. © 2023 SPIE.

关键词： Photodetectors

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Calibration for Astrophysics using an Artificial star with NIST-traceable Distribution of Luminous Energy (CANDLE) Instrument Development

Calibration for Astrophysics using an Artificial star with N...

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Conference on Space Telescopes and Instrumentation - optical, Infrared, and Millimeter Wave

作者： Peretz, Eliad Deustua, Susana Rice, Joseph Alberding, Brian G. Shirley, Eric Bui, Thinh Q. Shavit, Keshet Kuesters, Daniel Aldering, Greg vorobiev, Dmitry Papai, Jonathan Bohlin, Ralph Rose, Benjamin Albert, Justin Pachowski, Piotr Landry, Jean Thomas Gauvin, Etienne Michaud-Bayen, Thomas Kopp, Greg Mather, John Plavchan, Peter Tanner, Angelle NASA Goddard Space Flight Ctr Greenbelt MD 20771 USA NIST Gaithersburg MD 20899 USA Univ Calif Berkeley Berkeley CA 94720 USA Lawrence Berkeley Natl Lab Berkeley CA 94720 USA Lab Atmospher & Space Phys Boulder CO 80303 USA Space Telescope Sci Inst Baltimore MD 21218 USA Baylor Univ Waco TX 76798 USA Univ Victoria Victoria BC V8P 5C2 Canada George Mason Univ Fairfax VA 22030 USA OMP Inc Quebec City PQ G1K 4L2 Canada Mississippi State Univ Starkville MS 39762 USA

ISBN: (纸本)9781510675087;9781510675070

The CANDLE engineering Demonstration Unit (EDU) was selected by the 2022 APRA program to develop and demonstrate the ability to reach the flux accuracy and range required for an artificial flux calibration star. A critical issue in producing accurate and reliable flux calibration is systematic effects;this EDU is providing a path to deploying an artificial star calibration payload outside Earth's atmosphere with SI-traceable calibration that enables accurate throughput characterization of astronomical and earth science observatories in space and on the ground. Such a payload could be carried independently on a dedicated platform such as an orbiting satellite, e.g. the Orbiting Configurable Artificial Star (ORCAS), by a star shade at L2, or some other independent platform to enable accurate end-to-end throughput vs. wavelength calibration that can be measured repeatedly throughout the operational lifetime of an observatory. Once calibrated, the observatory is enabled to carry out astrophysical programs whose science objectives demand high accuracy and/or high precision observations. One specific and immediate application is establishing SI-traceable standard stars beyond the current limited set. We show in this paper the progress made in developing this EDU.

关键词： CANDLE Flux Calibration Artificial Standard Star Solar Reflector Instrument design Laser Cosmology

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Modulated DFB-ridge laser diodes at 894 nm for compact Cesium CPT atomic clocks 22

Modulated DFB-ridge laser diodes at 894 nm for compact Cesiu...

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Novel In-Plane Semiconductor Lasers XXII 2023

作者： Krakowski, M. Meghnagi, M. Afuso-Roxo, P. vinter, B. Duport, F. van Dijk, F. Larrue, A. Theveneau, C. vinet, E. Robert, Y. Legoec, J.P. Garcia, M. Parillaud, O. Gerard, B. III-V Lab. 1 av. Augustin Fresnel Palaiseau91767 France

ISBN: (纸本)9781510659858

Time & Frequency applications, such as time synchronization of complex networks, are in need of high accuracy and stability clocks. optically pumped Cesium tube atomic clocks satisfy these demands. However, Size, Weight and Power (SWaP) are very important parameters considering easier implementation of atomic clocks in systems. The innovative principal of Coherent Population Trapping (CPT) clocks can meet these challenges. They require a 894nm (Cs D1 line) DFB laser modulated at half the clock frequency (4.6GHz). The modulation generates the side bands separated by 9.2GHz. The laser should also keep a linewidth below 1MHz. We grow the layers of our laser structure two steps Metal Organic vapor Phase Epitaxy, with an Aluminum free active region. It includes a single GaInAsP compressively strained Quantum Well (QW) and a GaInP waveguide, on GaAs substrates. The use of Al free materials allows for the realization of a buried Bragg grating which induces a very stable single frequency operation as a function of current and temperature. We have investigated our actual 2mm long laser in light current characteristics, optical spectra, linewidth and direct modulation, showing high stability at different temperatures. The Cs D1 line is achieved near room temperature with a very high SMSR (50dB) and a low linewidth ( © 2023 SPIE.

关键词： Semiconductor alloys

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