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Highly Efficient Bifacial MAPbI3 Perovskite Solar Cells Improved by a Light-Trapping Electrode

Bulletin of the Russian Academy of Sciences: Physics 2022年第1-Sup期86卷 S152-S155页

作者： Obraztsova, A.A. Furasova, A.D. Barettin, D. Makarov, S.v. School of Physics and Engineering ITMO University St. Petersburg197101 Russia Department of Electronic Engineering Università Niccoló Cusano Rome00133 Italy Harbin Engineering University Harbin150001 China Qingdao Innovation and Development Center Harbin Engineering University Qingdao266000 China

Abstract: Nowadays all-dielectric nanophotonics is a powerful tool for improvement light management of thin-film optoelectronic devices because of low optical losses, strong light localization, and chemical robustness against such materials as halide perovskites. Here we propose a new highly efficient bifacial perovskite solar cells (PSCs) improved by introduction of light-trapping electrode (LTE), consisting of perforated Au + Spiro-OMeTAD layers covered with a densely array of SiO2 nanospheres. Our LTE combines charge collection and light trapping. We demonstrate that with our bifacial design of PSC with utilizing of LTE is more efficient over a monofacial analog by 3.5%. Our current study presents a new important step in research of photovoltaic facilities aimed to involve PSCs in real industrial development. © 2022, Allerton Press, Inc.

关键词： Electrodes

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Flexible photonics in carbon and glass fiber reinforced polymers for new multifunctionality: Exploring the advances, challenges, and opportunities

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optical Materials: X 2023年 20卷

作者： Holmes, Christopher Dulieu-Barton, Janice Optoelectronics Research Centre University of Southampton United Kingdom Bristol Composite Institute School of Civil Aerospace and Mechanical Engineering University of Bristol United Kingdom

Flexible photonics, characterized by their planar design and integrated features, have surfaced as a promising technology to unlock new possibilities for multifunctionality within fiber reinforced polymer composite materials. A comprehensive review of current progress, challenges, and opportunities associated with flexible photonic integration into carbon and glass fiber reinforced polymers is provided. A systematic examination of the literature has revealed several flexible photonic technologies that have demonstrated potential for integration in composite components to monitor performance in manufacture, service, and reuse. The review highlights the advantages and limitations of the current state-of-the-art in flexible integrated photonics for making assessments of compatibility with carbon and glass fiber reinforced polymer structures. By examining proof-of-concept demonstrations, the improved performance and novel functionalities that can be achieved for industrial applications are identified. The challenges associated with the integration process, such as durability and scalability are discussed in the context of the manufacturing processes required to create composite components. The concept of integrating flexible photonics in composite structures is relatively new, hence the paper closes by highlighting opportunities for further research and development in this field. © 2023

关键词： Laminated composites

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InSb-based five-band terahertz metamaterial thermally tunable absorbers 4

InSb-based five-band terahertz metamaterial thermally tunabl...

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4th Optics Young Scientist Summit, OYSS 2020

作者： Zhong, Peng Liang, Yuanda Qin, Zujun Huang, Wei Yin, Shan Guangxi Key Laboratory of Optoelectronic Information Processing Guilin University of Electronic Technology Guilin541004 China

ISBN: (数字)9781510643970

ISBN: (纸本)9781510643963

In this work, a five-band metamaterial absorber (MMA) for temperature sensing application in terahertz region is analyzed. The MMA is composed of three layers. The bottom layer is the metallic film, the middle dielectric layer is the indium antimonide (InSb) and the top layer is the metallic pattern, in which five resonance peaks are generated. With utilizing the dielectric thermo sensitive property of InSb, the resonant absorption is tunable by varying temperature. The electric current on the MMA is investigated to better understand the physical mechanism of the resonances, revealing the resonances attributed to the high-order magnetic resonances. The multi-band absorber is insensitive to the polarization angle, and be with ultrathin thickness of structure. This design of the MMA provides a new approach for electromagnetic stealth, sensing and imaging. © SPIE. Downloading of the abstract is permitted for personal use only.

关键词： III-v semiconductors

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Hypersonic heat barrier mitigation via structured thermal armor technology

Research Square

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Research Square 2024年

作者： Wang, Ji-Xiang Li, Jia-Xin Zhong, Mingliang Mao, Yufeng Wang, Hongmei Department of Mechanical Engineering The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong Special Administrative Region of China Hong Kong Shanghai Golden Deep Technology Corporation Shanghai200135 China China Academy of Launch Vehicle Technology Beijing100076 China Institute of Optics and Electronics Chinese Academy of Sciences Chengdu610209 China National Key Laboratory of Optical Field Manipulation Science and Technology Chinese Academy of Sciences Chengdu610209 China School of Science and Technology Hong Kong Metropolitan University Hong Kong Special Administrative Region of China Ho Man Tin Hong Kong

Hypersonic aerodynamic heating, also known as the heat barrier, is a dangerous energy form that humans have not yet fully overcome. The heat barrier has caused numerous catastrophic accidents and damage, as well as hindering the development of aerospace engineering. To date, indirect thermal protection methods, such as regenerative cooling, film cooling, and transpiration cooling, have proven to be complex, low in cooling efficiency, and detrimental to a hypersonic vehicle's reusability, maneuverability, and cost-effectiveness (RMC). Inspired by the latest Leidenfrost delay technology, we propose a direct liquid cooling technology to mitigate the effects of the heat barrier. Our proposed aluminum alloy-based structured thermal armor (STA) with a simple liquid cooling system, demonstrates the capability to rapidly mitigate simulated aerodynamic heating-induced extreme temperatures, exceeding 1400°C. This temperature is significantly higher than the melting points of conventional aircraft skin materials, such as aluminum alloys, which typically range from 600 to 700°C. Cycling tests indicate the STA's high durability and tolerance properties. Our research demonstrates that the STA is highly compatible with current hypersonic aerospace systems, promoting aerospace RMC. We also provide scale-up design guidelines for practical hypersonic vehicles' thermal protection. The STA offers a promising solution for hypersonic aerodynamic heating, providing a more efficient, durable, and cost-effective approach to thermal protection. This technology has the potential to revolutionize the aerospace industry, enabling the development of safer and more advanced hypersonic vehicles. © 2024, CC BY.

关键词： Aluminum alloys

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Carbon-based nanozymes: design, catalytic mechanism, and bioapplication

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COORDINATION CHEMISTRY REvIEWS 2023年 475卷

作者： Sun, Yun Xu, Bolong Pan, Xueting Wang, Hongyu Wu, Qingyuan Li, Shanshan Jiang, Bingyin Liu, Huiyu Beijing Univ Chem Technol Beijing Adv Innovat Ctr Soft Matter Sci & Engn State Key Lab Organ Inorgan Composites Beijing Lab Biomed MatBionanomaterials & Translat Beijing 100029 Peoples R China Capital Med Univ Sch Pharmaceut Sci Beijing Area Major Lab Peptide & Small Mol Drugs Beijing 100069 Peoples R China

Carbon-based nanomaterials with enzyme-like activity are new candidates in materials science. So far, various carbon-based nanozymes have been developed, such as fullerenes, graphene quantum dots and metal organic framework-derived carbon materials. Unlike natural enzymes, carbon-based nano-zymes have abundant active sites, excellent stability, and good biological safety, showing great potential in biomedical applications. In particular, the unique optical, thermal and acoustic properties of carbon -based nanozymes have also been revealed, providing a multifunctional platform for its biomedical appli-cations. This review discusses the recent research progress of carbon-based nanozymes and proposes their current challenges and perspectives.(c) 2022 Elsevier B.v. All rights reserved.

关键词： Carbon -based nanozymes Reactive oxygen species Catalytic therapy Synergistic therapy

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中红外抗CO_(2)气体辐射负滤光片的研制(特邀)

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光子学报 2022年第9期51卷 42-50页

作者：付秀华张天翔熊仕富林兆文王奔长春理工大学光电工程学院长春130022 长春理工大学中山研究院广东中山528436 天津理工大学功能晶体研究院天津300384

为提高中红外探测系统在载体高速运动过程中的探测精度,研制了抗CO_(2)气体辐射的负滤光片,在非球面单晶Si基板表面,选择Ge、ZnS和YbF_(3)作为镀膜材料,结合膜系设计基础理论,使用OptiLayer膜系设计软件对负滤光膜进行设计,石英晶体膜... 详细信息

为提高中红外探测系统在载体高速运动过程中的探测精度,研制了抗CO_(2)气体辐射的负滤光片,在非球面单晶Si基板表面,选择Ge、ZnS和YbF_(3)作为镀膜材料,结合膜系设计基础理论,使用OptiLayer膜系设计软件对负滤光膜进行设计,石英晶体膜厚控制仪进行厚度监控。根据实验结果及膜层敏感度反演分析,优化膜厚监控方案解决了负滤光膜通带次峰过多及透射率下降等问题。测试结果表明,制备的负滤光片在4.15~4.4μm、5.15~5.5μm波段平均透射率分别为0.87%和0.23%;3.65~3.95μm、4.50~4.85μm波段平均透射率分别为87.04%和89.79%。研制的负滤光片有效提高了目标的探测精度,为中红外探测技术提供了重要的技术支持。

关键词：光学薄膜负滤光片膜层敏感度气体辐射红外探测器

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Miniaturised photonic front-end for the next generation of space SAR applications

Miniaturised photonic front-end for the next generation of s...

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2020 International Conference on Space Optics, ICSO 2020

作者： Mengual, T. Duarte, vanessa C. Polo, v. Piqueras, M.A. Sanchis, P. Brimont, A. Zurita, D. Chmielak, B. Suckow, S. Giesecke, A. Matarazzo, E. DiPalma, L. Maiarelli, D. Wang, H. Huggard, P.G. DAS Photonics Camino de Vera s/n Edificio 8F Valencia46022 Spain Nanophotonics Technology Center UPV Camino de Vera s/n Valencia46022 Spain AMO GmbH Otto-Blumenthal-Str. 25 Aachen52074 Germany AIRBUS Italia S.p.A. Via dei Luxardo 22- Rome24 - 00156 Italy RAL Space STFC Rutherford Appleton Laboratory Ox11 0QX Didcot United Kingdom

There is a natural trade-off between spacecraft size and functionality in all current satellite applications, independently of orbit and mission. Therefore, advances in both miniaturization and integration technologies are required to increase satellites' lifetime and performance, simultaneously reducing their cost. In case of the next generation of Earth Observation satellites, one of the key development areas is synthetic aperture radar (SAR) antennas, where expected progress will be to increase the operating bandwidth - requiring, for instance wideband true-time delay (TTD) beamformers - and miniaturization, drastically reducing the mass and volume compared to current implementations. In this scenario, the use of photonic integrated circuits (PIC) technology in the beamforming network, in combination with an optical fibre harness, are obvious key enabling technologies for future SAR instruments. optically implemented TTD beamforming structures achieve orders-of-magnitude improvements in size and mass compared with coaxial cable and RF switch based alternatives. Photonic technology also brings easy routing thanks to wavelength-division multiplexing, antenna and RF system integration due to the EMI-free characteristic of the optical fibre and a reduction of the risks associated with the in-orbit antenna deployment. Additionally, the inherent broadband characteristic of photonic technology, related to the transport and processing of RF signals, simplifies the beamforming network and signal distribution design for different frequencies, applications and missions. In the H2020 RETINA project (H2020-SPACE-2018-821943) a consortium formed by DAS Photonics, Airbus Italia, AMO GmbH, STFC Rutherford Appleton Laboratory and Universitat Politècnica de valència is developing a miniaturised photonic front-end for next-generation X-band space SAR applications. In this article we present advances in design and fabrication of PIC for TTD, the design and predicted performance of m

关键词： Synthetic aperture radar

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Structure and Mixed Signal Front-End of White Organic Light Source for MEMS Sensor

Structure and Mixed Signal Front-End of White Organic Light ...

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International Conference on Perspective Technologies and Methods in MEMS design (MEMSTECH)

作者： Nazar Barylo Oksana Boyko Roman Holyaka Pavlo Stakhira Stepan Kutsiy Iryna Yaremchuk Department of Electronic Engineering Lviv Polytechnic National University Lviv Ukraine Medical Informatics Department Danylo Halytsky Lviv National Medical University Lviv Ukraine Department of Electronics and Information Technology Lviv Polytechnic National University Lviv Ukraine

ISBN: (纸本)9798350396812

The work is devoted to the problem of developing the structure of an organic light-emitting diode (OLED) and mixed signal front-end with extended functionality, specifically, in-situ measurement of the current-voltage (I-v) characteristics of the structure directly during their operation. The OLED structure uses long-term thermally activated delayed fluorescence (TADF) of the TPAPm organic film. The measurement of I-v characteristics of OLED structures is carried out on the transient processes of voltage formation in the step-up circuits of the drivers. The OLED front-end is implemented on a programmable system on a PSoC chip of the 5LP Family Cypress Semiconductor Corporation. The results of the work are used for optical MEMS sensors using organic light sources.

关键词： Temperature measurement Micromechanical devices Temperature sensors Semiconductor device measurement voltage measurement Organic light emitting diodes Sensor phenomena and characterization

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MEMS-actuated metasurface Alvarez lens

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Microsystems & Nanoengineering 2020年第1期6卷 334-344页

作者： Zheyi Han Shane Colburn Arka Majumdar Karl F.Bohringer Department of Electrical and Computer Engineering University of WashingtonSeattleWashington 98195USA Institute for Nano-Engineered Systems University of WashingtonSeattleWashington 98195USA Department of Physics University of WashingtonSeattleWashington 98195USA Department of Bioengineering University of WashingtonSeattleWashington 98195USA

Miniature lenses with a tunable focus are essential components for many modern applications involving compact optical *** several tunable lenses have been reported with various tuning mechanisms,they often face challenges with respect to power consumption,tuning speed,fabrication cost,or production *** this work,we have adapted the mechanism of an Alvarez lens–a varifocal composite lens in which lateral shifts of two optical elements with cubic phase surfaces give rise to a change in the optical power–to construct a miniature,microelectromechanical system(MEMS)-actuated metasurface Alvarez *** based on an electrostatic MEMS generates fast and controllable actuation with low power *** utilization of metasurfaces–ultrathin and subwavelength-patterned diffractive optics–as optical elements greatly reduces the device volume compared to systems using conventional freeform *** entire MEMS Alvarez metalens is fully compatible with modern semiconductor fabrication technologies,granting it the potential to be mass-produced at a low unit *** the reported prototype operating at 1550 nm wavelength,a total uniaxial displacement of 6.3µm was achieved in the Alvarez metalens with a direct-current(DC)voltage application up to 20v,which modulated the focal position within a total tuning range of 68µm,producing more than an order of magnitude change in the focal length and a 1460-diopter change in the optical *** MEMS Alvarez metalens has a robust design that can potentially generate a much larger tuning range without substantially increasing the device volume or energy consumption,making it desirable for a wide range of imaging and display applications.

关键词： electrostatic optics adapted

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Ultra Low Power Transimpedance Amplifier design for Receivers with Large-Area Photodetectors

Ultra Low Power Transimpedance Amplifier Design for Receiver...

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International Conference on Electrical and Electronics engineering, ELECO

作者： Ali Doğuş Güngördü Mustafa Berke Yelten Istanbul Technical University Electronics and Communications Engineering Istanbul Turkey

ISBN: (纸本)9781665409407

This paper describes a novel transimpedance ampli-fier design for 1 Gbps, 4-level pulse amplitude modulation (PAM) scheme, and plastic optical fiber (POF) communications. The proposed transimpedance amplifier (TIA) takes in the current from a large photodetector with a 30 pF parasitic capacitance. The circuit exploits a flipped voltage follower (FvF) and global current feedback to operate up to 300 MHz with ultra-low static power. The TIA consumes only 80 µW static power under a 1 v supply voltage. The design is validated with simulations using a commercial 40 nm process technology.

关键词： optical fiber amplifiers Plastic optical fiber voltage Receivers Amplitude modulation Photodetectors Low-power electronics

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