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IEEE Photovoltaic Specialists Conference

作者： Shi Liu Ding Ding Shane R. Johnson Yong-Hang Zhang Center for Photonics Innovation and School of Electrical Computer and Energy Engineering Arizona State University Tempe AZ 85287 USA

ISBN: (纸本)9781467300667

Single-junction GaAs solar cells have been studied extensively recently, and have reached over 28% efficiency. Further improvement requires an optically thick but physically thin absorbing layer to provide not only high open-circuit voltage but also large short-circuit current. This paper studies various optical designs, such as light scattering and reflection at various surfaces. It is concluded that thin GaAs solar cells with hundreds of nanometers thickness and the combination of textured surfaces and reflective back surfaces can potentially offer efficiencies greater than 30% under one sun AM1.5G solar spectrum. A practical approach is proposed to realize these structures by roughening a lattice-matched ZnSe layer grown on the device. The achievable efficiencies of all these structures are discussed.

关键词： absorption gallium arsenide optical design photovoltaic cells surface roughness

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(INvITED) Roadmap on perovskite nanophotonics

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optical Materials: X 2023年 17卷

作者： Soci, Cesare Adamo, Giorgio Cortecchia, Daniele Wang, Kaiyang Xiao, Shumin Song, Qinghai Schall-Giesecke, Anna Lena Cegielski, Piotr J. Lemme, Max C. Gerace, Dario Sanvitto, Daniele Tian, Jingyi Tonkaev, Pavel A. Makarov, Sergey v. Kivshar, Yuri S. Jimenez Gordillo, Oscar A. Melloni, Andrea Pushkarev, Anatoly P. D'Amato, Marianna Lhuillier, Emmanuel Bramati, Alberto Centre for Disruptive Photonic Technologies TPI Nanyang Technological University 21 Nanyang Link Singapore 63737 Singapore Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link Singapore 637371 Singapore Istituto Italiano di Tecnologia Milan20133 Italy Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System Harbin Institute of Technology Shenzhen Shenzhen518055 China AMO GmbH Advanced Microelectronic Center Aachen Otto-Blumenthal-Str. 25 Aachen52074 Germany Chair of Electronic Devices RWTH Aachen University Otto-Blumenthal-Str. 2 Aachen52074 Germany Dipartimento di Fisica Università di Pavia via Bassi 6 Pavia27100 Italy CNR-Nanotec Institute of Nanotechnology via Monteroni Lecce73100 Italy Australian National University Canberra ACT 2601 Australia ITMO University St. Petersburg191002 Russia Dipartimento di Elettronica Informazione e Bioingegneria Politecnico di Milano Via Ponzio 34/5 Milano20133 Italy Laboratoire Kastler Brossel Sorbonne Universitè CNRS ENS-PSL Research University College de France 4 place Jussieu Cedex 05 Paris75252 France Sorbonne Université CNRS Institut des NanoSciences de Paris INSP ParisF-75005 France Qingdao Innovation and Development Center Harbin Engineering University Shandong Qingdao266000 China

Perovskite nanophotonics is a rapidly emerging field that combines research in synthesis of materials with novel properties and in photonics design strategies. Starting from early pioneering works on halide perovskite compounds that showed great potential across optoelectronics and photonics applications, the field is ready to blossom by combining recent advances in synthetic material design, the development of bottom-up or top-down nanostructuring approaches and new concepts in nanohophotonic engineering of light matter interaction at the nanoscale, with a chance of having real impact on current and future technologies. This roadmap is a collective outlook from pioneers in the field of perovskite nanophotonics that encompasses a number of the emerging research areas with the aim of identifying current and future challenges and highlighting the most promising research directions. It will be of interest and serve as a reference to a wide audience of physicists, chemists and engineers with interest in perovskite nanophotonics. © 2022

关键词： Quantum optics

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电动汽车永磁同步电机IGBT驱动系统硬件设计

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机电元件 2022年第6期42卷 14-17页

作者：顾捷邓孝华叶萌李然严俐慧南京工程学院电力工程学院江苏南京211167

该文基于TMS320F28335DSP设计了三相永磁同步电机IGBT驱动系统硬件,其包括三相逆变电路、TLP250光耦隔离放大、B0524S-2WR2电压转换等电路的设计。具体设计了三相逆变电路参数、TLP250的限流输入电路、15v和-9.1v驱动电压电路、消谐和... 详细信息

该文基于TMS320F28335DSP设计了三相永磁同步电机IGBT驱动系统硬件,其包括三相逆变电路、TLP250光耦隔离放大、B0524S-2WR2电压转换等电路的设计。具体设计了三相逆变电路参数、TLP250的限流输入电路、15v和-9.1v驱动电压电路、消谐和快速放电电路。最后结合软件控制程序进行了驱动系统实验,得到的IGBT驱动电压和电机电流波形,验证了IGBT驱动系统硬件设计的正确性。

关键词：永磁同步电机三相逆变 IGBT驱动实验波形

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3D optical AND DEvICE SIMULATION OF SURFACE PLASMONIC EFFECTS ON ORGANIC SOLAR CELLS USING SILvER NANO PRISMS

3D OPTICAL AND DEVICE SIMULATION OF SURFACE PLASMONIC EFFECT...

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IEEE Photovoltaic Specialists Conference

作者： Wenjun Jiang Scott. T. Dunham Physics Department University of Washington Department of Electrical Engineering University of Washington

ISBN: (纸本)9781424499663

We explore the enhancement of light absorption due to triangle-shaped silver nanoprisms in P3HT:PCBM active layer and its impact on organic solar cell performance by coupling optical and electronic device simulation. We use optical simulation via FDTD solution of Maxwell's equations in order to calculate the surface plasmonic resonance at the interface of P3HT:PCBM and silver nanoprisms. The presence of silver nanoprisms results in dramatic local enhancement of optical absorption. We explore different design of silver nanoprisms by changing sizes, densities, and relative orientations to see their impact on optical carrier generation. From the device modeling point of view, a thinner active layer enabled by enhanced absorption reduces the mismatch of light absorption depth with exciton dissociation length. We use the Sentaurus Device simulator (Synopsys), adapted with material-specific models for electronic polymers, to explore the impact of surface plasmon resonance on device behavior. The coupling of optical and electrical simulation gives a short-circuit current increase of 3 times for 35nm ultra-thin active layer with silver nanoprisms, consistent with experiment.

关键词： Silver optical surface waves Plasmons Photovoltaic cells optical reflection Absorption Surface morphology

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基于GaN HEMT的X波段连续波内匹配功率管设计

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微波学报 2020年第3期36卷 76-80页

作者：马跃王建朋南京理工大学电光学院南京210094 南京电子器件研究所南京210016

采用内匹配技术,使用两枚GaN HEMT晶体管,在X波段8.0~8.5 GHz频段内,设计并实现了一种高可靠性、高功率附加效率的功率放大器。基于南京电子器件研究所提供的晶体管及负载牵引数据,并结合"L-C-L"匹配网络以及威尔金森功率分配... 详细信息

采用内匹配技术,使用两枚GaN HEMT晶体管,在X波段8.0~8.5 GHz频段内,设计并实现了一种高可靠性、高功率附加效率的功率放大器。基于南京电子器件研究所提供的晶体管及负载牵引数据,并结合"L-C-L"匹配网络以及威尔金森功率分配/合成器,对晶体管的输入和输出阻抗进行了相应匹配,使得其端口阻抗均为50Ω。最终通过两胞合成的方式实现了在目标频段内,栅电压-2.2 v、漏电压24 v,连续波工作状态下,所设计功率放大器输出功率高于20 W、功率增益大于10 dB、功率的附加效率大于49.7%。其中,在8.1~8.4 GHz,该功率放大器功率附加效率超过52%,优于我国现有相近频段内匹配功率放大器的功率附加效率,并通过实验验证了该设计方案的可靠性。

关键词：氮化镓高电子迁移率晶体管(GaN HEMT) 功率放大器 X波段内匹配高功率附加效率

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基于体端调制技术的快速瞬态响应LDO设计

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电子元件与材料 2024年第12期43卷 1493-1501页

作者：夏荣华陈磊崔杰上海电力大学电子与信息工程学院上海201306 南京理工大学电子工程与光电技术学院南京210094

随着Wi-Fi 7标准的提出,对低压差线性稳压器(LDO)的瞬态响应能力提出了更高的要求。为满足需要,基于0.11μm CMOS工艺,设计了一种快速瞬态响应的无输出电容高性能LDO。利用体端调制技术,为功率管级缓冲级体端提供自适应偏置,在负载跳变... 详细信息

随着Wi-Fi 7标准的提出,对低压差线性稳压器(LDO)的瞬态响应能力提出了更高的要求。为满足需要,基于0.11μm CMOS工艺,设计了一种快速瞬态响应的无输出电容高性能LDO。利用体端调制技术,为功率管级缓冲级体端提供自适应偏置,在负载跳变时实现快速瞬态响应。同时,采用以比较器为核心的摆率增强电路,进一步减小LDO输出的下冲电压。主通路通过采用折叠共源共栅与超级源跟随的架构,并使用加入调零电阻的混合共源共栅补偿来提高增益与相位裕度。仿真结果表明,在各负载条件下,相位裕度均能达到50°以上,满足稳定性需求。当负载电流在1μs内从空载跳变到40 mA时,输出下冲电压为123.6 mv,输出过冲电压为45.9 mv,相比传统LDO分别减小了1.26 v和72.5 mv。

关键词：快速瞬态响应无片外电容体端调制技术 Hybrid Cascode补偿超级源跟随

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Roadmap on Advances in visual and Physiological Optics

arXiv

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arXiv 2024年

作者： Gómez-Correa, Jesús E. vohnsen, Brian Pierścionek, Barbara K. Chávez-Cerda, Sabino Kling, Sabine Rozema, Jos J. Applegate, Raymond A. Scarcelli, Giuliano Randleman, J. Bradley Goncharov, Alexander v. Fitzpatrick, Amy Morgan, Jessica I.W. Roorda, Austin Atchison, David A. Trevino, Juan P. Consejo, Alejandra Börjeson, Charlie Lundström, Linda Bang, Seung Pil Yoon, Geunyoung Karnowski, Karol Kaluzny, Bartlomiej J. Grulkowski, Ireneusz Barbero, Sergio Artal, Pablo Tabernero, Juan Kollbaum, Pete Thébault, Stéphanie C. Instituto Nacional de Astrofísica Óptica y Electrónica Coordinación de Óptica Pue 72840 Mexico Optics Group School of Physics University College Dublin Beech Hill Ireland Faculty of Health Medicine and Social Care Medical Technology Research Centre Anglia Ruskin University Bishops Hall Lane Chelmsford United Kingdom ARTORG Center for Biomedical Engineering Research University of Bern Freiburgstrasse 3 Bern3010 Switzerland Visual Optics Lab Antwerp Faculty of Medicine and Health Sciences University of Antwerp Wilrijk Belgium Dept. of Ophthalmology Antwerp University Hospital Edegem Belgium College of Optometry University of Houston HoustonTX United States University of Maryland College ParkMD United States Cole Eye Institute ClevelandOH United States School of Natural Sciences University of Galway Ireland Scheie Eye Institute Department of Ophthalmology University of Pennsylvania PhiladelphiaPA United States Center for Advanced Retinal and Ocular Therapeutics University of Pennsylvania PhiladelphiaPA United States Herbert Wertheim School of Optom. Vis. Sci. University of California Berkeley BerkeleyCA94720-2020 United States Centre for Vision and Eye Research Queensland University of Technology Kelvin Grove Australia Universidad Politécnica de Puebla Cuanalá Puebla 72640 Mexico Tecnológico de Monterrey Mexico University of Zaragoza Zaragoza Spain KTH Royal Institute of Technology Department of Applied Physics Stockholm Sweden Department of Ophthalmology Keimyung University Dongsan Medical Center Daegu Korea Republic of International Centre for Translational Eye Research ul. Skierniewicka 10A Warsaw01-230 Poland Institute of Physical Chemistry Polish Academy of Sciences ul. M. Kasprzaka 44/52 Warszawa01-224 Poland Department of Ophthalmology Collegium Medicum Nicolaus Copernicus University ul. M. Curie Sklodowskiej 9 Bydgoszcz85-094 Poland Institute of Physics Faculty of Physics Astronomy and Informatics Nicolaus Copernicus Un

The field of visual and physiological optics is undergoing continuous significant advancements, driven by a deeper understanding of the human visual system and the development of cutting-edge optical technologies. This Roadmap, authored by leading experts, delves into critical areas such as corneal biomechanical properties, keratoconus, and advancements in corneal imaging and elastography. It explores the intricate structure-function relationship within the eye lens, offering new perspectives through lens models and ray tracing techniques. The document also covers advancements in retinal imaging, highlighting the current state and future directions, and the role of adaptive optics in evaluating retinal structure and function in both healthy and diseased eyes. Furthermore, it addresses the modelling of ocular surfaces using different mathematical functions and examines the factors affecting peripheral image quality in the human eye, emphasizing the importance of these aspects in visual performance. Additional topics include schematic and functional models of the human eye, the impact of optical and chromatic aberrations, and the design of contact, and intraocular lenses. Finally, the Roadmap addresses the intersection of neurosciences with vision health, presenting a comprehensive overview of current research and future trends aimed at improving visual health and optical performance. Ultimately, this Roadmap aims to serve as a valuable resource for ophthalmologists, optometrists, vision scientists, and engineers dedicated to advancing the field of visual and physiological optics. Copyright © 2024, The Authors. All rights reserved.

关键词： Adaptive optics

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Scanless Spectral Imaging of Terahertz vortex Beams Generated by High-Resolution 3D-Printed Spiral Phase Plates

SMALL SCIENCE

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SMALL SCIENCE 2024年第12期4卷 2400352页

作者： Paraipan, Andreea Aura Gonzalez-Hernandez, Diana Reddy, Innem v. A. K. Balistreri, Giacomo Zanotto, Luca Shalaby, Mostafa Morandotti, Roberto Liberale, Carlo Razzari, Luca Inst Natl Rech Sci INRS Ctr Energie Mat Telecommun 1650 Blvd Lionel Boulet Varennes PQ J3X 1P7 Canada King Abdullah Univ Sci & Technol KAUST Biol & Environm Sci & Engn Div Thuwal 239556900 Saudi Arabia Univ Buffalo Dept Biomed Engn Buffalo NY 14260 USA Swiss Terahertz GmbH Swiss Terahertz Res Zurich CH-8005 Zurich Switzerland King Abdullah Univ Sci & Technol KAUST Comp Elect & Math Sci & Engn Div Thuwal 239556900 Saudi Arabia

Terahertz technology has experienced significant advances in the past years, leading to new applications in the fields of spectroscopy, imaging, and communications. This progress requires the development of dedicated optics to effectively direct, control and manipulate terahertz radiation. In this regard, 3D printing technologies have shown great potential, offering fast prototyping, high design flexibility, and good reproducibility. While traditional 3D printing techniques allow for the preparation of terahertz optical components operating at relatively low frequencies (<0.4 THz) due to their limited resolution, two-photon polymerization lithography (TPL) exhibits high detail resolution and low surface roughness and can thus potentially enable the fabrication of high-frequency terahertz devices. Here, as a proof of principle, spiral phase plates operating at 1 THz are designed and fabricated by means of TPL. Moreover, these samples are characterized via a rapid and scanless terahertz imaging technique customized to obtain a coherent hyperspectral analysis of the generated vortex beams at varying distances along propagation. Numerical simulations are also conducted for comparison with experiments, revealing a good agreement. current limitations of the technique are found to be mainly related with terahertz loss in TPL polymers, and possible solutions are discussed.

关键词： high-resolution 3D printing scanless terahertz hyperspectral imaging spiral phase plate terahertz vortex beam two-photon polymerization lithography

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Dr. C. v. Drysdale, C.B., C.B.E.

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Nature 1936年第3459期137卷 266-266页

THE thirteenth Duddell Medal of the Physical Society was presented on February 7 to Dr. C. v. Drysdale, who is distinguished for his outstanding work in connexion with electrical and optical instruments. Dr. Drysdale was responsible for the design of the first accurate single-phase standard wattmeters in 1901, following them immediately by the first double wattmeters for polyphase measurements, and a few years later by accurate phase-shifting transformers for wattmeter and supply meter testing. In 1909 he adapted the phase-shifting transformer to the design of the first alternating and direct current potentiometer, and devised a vibration galvanometer and low inductance resistance standards which enables that instrument to be used for standardising purposes as well as for general testing, applying it particularly to transmission in telephone circuits. He was also responsible for other electrical standardising apparatus. In 1899, he took charge of the Electrical engineering and Applied Physics Department of the Northampton Institute, Clerkenwell, and in the following year started the first Technical Optics Department at the Northampton Institute, with a lens grinding workshop. Then came a period of active research in optics, and including the design of lens systems, a universal optical bench for the rapid testing of spherical and cylindrical lens, etc.

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A series of selenium-containing non-fullerene acceptors with side chain engineering for organic solar cells

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DYES AND PIGMENTS 2022年 207卷

作者： Oh, Juhui Park, Hye Yeon Kim, Ju-Hyeon Chen, Shuhao Lee, Sanseong Kim, Jaeyoung Song, Xuyao Kang, Hongkyu Jang, Soo-Young Kwon, Soon-Ki Kim, Yun-Hi Lee, Kwanghee Gwangju Inst Sci & Technol Sch Mat Sci & Engn Heeger Ctr Adv Mat HCAM Res Inst Solar & Sustainable Energies RISE Gwangju 61005 South Korea Gyeongsang Natl Univ Dept Mat Engn & Convergence Technol Jinju 52828 South Korea Gyeongsang Natl Univ ERI Jinju 52828 South Korea Gyeongsang Natl Univ Dept Chem Jinju 52828 South Korea Gyeongsang Natl Univ RINS Jinju 52828 South Korea Gwangju Inst Sci & Technol Ctr Res Innovat Gwangju South Korea Gwangju Inst Sci & Technol Res Inst Solar & Sustainable Energies Gwangju 61005 South Korea

Non-fullerene acceptors (NFAs) have been crucial in improving the efficiency of organic solar cells (OSCs) due to their attractive properties, such as strong light-harvesting ability, easily tunable energy levels, and high crys-tallinity. Nevertheless, general NFAs have limited light absorption, and studies on the design of NFAs that can absorb a broad range of the solar spectrum and that offer complementary absorption to that of donors should be conducted. Because selenium, a chalcogen element, can induce strong intermolecular SeMIDLINE HORIZONTAL ELLIPSISSe interactions, planarity, and extended effective conjugated length in OSC materials, NFAs with selenium usually exhibit redshifted absorption. Here, we synthesized a series of selenium-containing non-fullerene acceptors with different inner alkyl chain lengths, named Se-Y6-BO (2,2'-((2Z, 2 ' Z)-((12,13-bis(2-butyloctyl)-3,9-dinonyl-12,13-dihydroselenopheno[2 '',3":4 ',5']thieno[2 ',3':4,5]pyrrolo[3,2-g]selenopheno[2 ',3':4,5]thieno [3,23,2-b] [1,2,5] thiadiazolo [3,43,4-e]indole-2,10-diyl)bis(methanylylidene))bis(5,6-dichloro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile) and Se-Y6-HD (2,2'-((2Z, 2 ' Z)-((12,13-bis(2-hexyldecyl)-3,9-dinonyl-12,13-dihy-droselenopheno[2 '',3":4 ',5']thieno[2 ',3':4,5]pyrrolo[3,2-g]selenopheno[2 ',3':4,5]thieno [3,23,2-b] [1,2,5]thia-diazolo [3,43,4-e]indole-2,10-diyl)bis(methanylylidene))bis(5,6-dichloro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile). The optical absorption of two selenium-containing NFAs was redshifted compared with that of Y6 due to the effect of selenium atoms in the backbone. The PM6:Se-Y6-BO-based devices achieved a power conversion efficiency (PCE) of 13.8% with an open-circuit voltage (vOC) of 0.81 v, short-circuit current density (JSC) of 24.4 mA cm-2, and a fill factor of 0.70. Similarly, the OSCs based on PM6:Se-Y6-HD achieved a PCE of 13.6% and a JSC of 23.7 mA cm-2.

关键词： Organic solar cells Non-fullerene acceptors Selenium Side -chain engineering Thermal stability

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