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Effects of Back-Reflectors on a-Si: H Solar Cells

Journal of Physics: Conference Series 2021年第1期1965卷

作者： Zhihua Hu Abuduwayiti Aierken Hongwei Diao Key Lab. of Advanced Technology & Preparation for Renewable Energy Materials State Ministry of Education Yunnan Key Lab. of Rural Energy Engineering School of Energy and Environmental Sciences Yunnan Normal University Kunming Yunnan P.R. China Institute of Electrical Engineering Chinese Academic of Sciences Beijing P.R. China

ZAO (ZnO: Al)/Al and ITO/Ag complex back-reflectors were successfully applied to substrate nip and superstrate pin amorphous silicon solar cells respectively. As a result, the short circuit current (Isc) for a cell with a complex back-reflector increases significantly as compared with a cell without a complex back-reflector. For a superstrate pin cell prepared on SnO2 coated glass, the short-circuit current even increases up to 30%.

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Selective Activation of Lattice Oxygen Site Through Coordination engineering to Boost the Activity and Stability of Oxygen Evolution Reaction

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Angewandte Chemie 2024年第36期136卷

作者： Guikai Zhang Jiajing Pei Yueshuai Wang Guowei Wang Yongsheng Wang Wenchao Liu Jinfeng Xu Pengfei An Huan Huang Lirong Zheng Shengqi Chu Juncai Dong Jing Zhang Beijing Synchrotron Radiation Facility Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China School of Nuclear Science and Technology University of Chinese Academy of Sciences Beijing 100049 China Beijing Key Lab of Microstructure and Property of Advanced Materials College of Materials Science and Engineering Beijing University of Technology Beijing 100124 China State Key Lab of Organic-Inorganic Composites and Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Beijing 100029 China

Although Ru-based materials are among the outstanding catalysts for the oxygen evolution reaction (OER), the instability issue still haunts them and impedes the widespread application. The instability of Ru-based OER catalysts is generally ascribed to the formation of soluble species through the over-oxidation of Ru and structural decomposition caused by involvement of lattice oxygen. Herein, an effective strategy of selectively activating the lattice oxygen around Ru site is proposed to improve the OER activity and stability. Our synthesized spinel-type electrocatalyst of Ru and Zn co-doped Co 3 O 4 showed an ultralow overpotential of 172 mV at 10 mA cm −2 and a long-term stability reaching to 100 hours at 10 mA cm −2 for alkaline OER. The experimental results and theoretical simulations demonstrated that the lattice oxygen site jointly connected with the octahedral Ru and tetrahedral Zn atoms became more active than other oxygen sites near Ru atom, which further lowered the reaction energy barriers and avoided generating excessive oxygen vacancies to enhance the structural stability of Ru sites. The findings hope to provide a new perspective to improve the catalytic activity of Ru-incorporated OER catalysts and the stability of lattice-oxygen-mediated mechanism.

关键词： Selective activation Coordination engineering Spinel Co3O4 Co-doped Activity and stability

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Pressure-Induced Superconductivity in Topological Heterostructure (PbSe)5(Bi2Se3)6

arXiv

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arXiv 2023年

作者： Pei, Cuiying Zhu, Peng Li, Bingtan Zhao, Yi Gao, Lingling Li, Changhua Zhu, Shihao Zhang, Qinghua Ying, Tianping Gu, Lin Gao, Bo Gou, Huiyang Yao, Yansun Sun, Jian Liu, Hanyu Chen, Yulin Wang, Zhiwei Yao, Yugui Qi, Yanpeng School of Physical Science and Technology ShanghaiTech University Shanghai201210 China School of Physics Beijing Institute of Technology Beijing100081 China Beijing Key Lab of Nanophotonics and Ultrafine Optoelectronic Systems Beijing Institute of Technology Beijing100081 China Material Science Center Yangtze Delta Region Academy of Beijing Institute of Technology Jiaxing314011 China State Key Laboratory of Superhard Materials International Center for Computational Method and Software College of Physics Jilin University Changchun130012 China International Center of Future Science Jilin University Changchun130012 China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing100190 China Center for High Pressure Science and Technology Advanced Research Beijing100094 China Department of Physics and Engineering Physics University of Saskatchewan SaskatoonSKS7N 5E2 Canada National Laboratory of Solid State Microstructures School of Physics Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing210093 China ShanghaiTech Laboratory for Topological Physics ShanghaiTech University Shanghai201210 China Department of Physics Clarendon Laboratory University of Oxford Parks Road OxfordOX1 3PU United Kingdom Shanghai Key Laboratory of High-Resolution Electron Microscopy ShanghaiTech University Shanghai201210 China

Recently, the natural heterostructure of (PbSe)5(Bi2Se3)6 has been theoretically predicted and experimentally confirmed as a topological insulator. In this work, we induce superconductivity in (PbSe)5(Bi2Se3)6 by implementing high pressure. As increasing pressure up to 10 GPa, superconductivity with Tc ~ 4.6 K suddenly appears, followed by an abrupt decrease. Remarkably, upon further compression above 30 GPa, a new superconducting state arises, where pressure raises the Tc to an unsaturated 6.0 K within the limit of our research. Combining XRD and Raman spectroscopies, we suggest that the emergence of two distinct superconducting states occurs concurrently with the pressure-induced structural transition in this topological heterostructure (PbSe)5(Bi2Se3)6. © 2023, CC BY-NC-ND.

关键词： Topology

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Correction: Layer-structured FeCo bihydroxide as an ultra-stable bifunctional electrocatalyst for water splitting at high current densities

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Sustainable Energy & Fuels 2021年第12期5卷 3247-3247页

作者： Chaoyang Sun Hui Wang Shan Ji Xuyun Wang Vladimir Linkov Xinlong Tian Long Yao Jiarui Zhao Rongfang Wang State Key Laboratory Base for Eco-Chemical Engineering College of Chemical Engineering Qingdao University of Science and Technology Qingdao China College of Biological Chemical Science and Engineering Jiaxing University Jiaxing China South African Institute for Advanced Materials Chemistry University of the Western Cape Cape Town South Africa State Key Laboratory of Marine Resource Utilization in South China Sea Hainan Provincial Key Lab of Fine Chemistry School of Chemical Engineering and Technology Hainan University Haikou China

Correction for ‘Layer-structured FeCo bihydroxide as an ultra-stable bifunctional electrocatalyst for water splitting at high current densities’ by Chaoyang Sun et al., Sustainable Energy Fuels, 2021, DOI: 10.1039/d...

Correction for ‘Layer-structured FeCo bihydroxide as an ultra-stable bifunctional electrocatalyst for water splitting at high current densities’ by Chaoyang Sun et al., Sustainable Energy Fuels, 2021, DOI: 10.1039/d1se00380a.

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Residual stress relaxation of cubic boron nitride thin films deposited in Ar with other noble gases

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IOP Conference Series: Materials Science and engineering 2011年第1期20卷

作者： T Ohori J Shirahata T Suzuki T Nakayama H Suematsu S W Lee Z Fu K Niihara Extreme Energy-Density Research Institute Nagaoka University of Technology Niigata 940-2188 Japan Department of Environmental Engineering Sun Moon University Chungnam 336-708 Korea State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

A novel method based on radio frequency magnetron sputtering tailored to the deposition of low residual stress and adherent c-BN thin films on silicon substrates was developed. In this study, the effect of noble gas (Kr, Ar, Ne and He) added in Ar gas during sputtering on the residual stress and the c-BN content has been investigated. As a result, it was found that the residual stress of c-BN thin film decreased with increasing the helium gas flow rate within argon gas.

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Particle size control of silver nanoparticles prepared by pulsed wire discharge in liquid media

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IOP Conference Series: Materials Science and engineering 2011年第1期20卷

作者： Y Tokoi K Josho Y M Izuari T Suzuki T Nakayama H Suematsu S W Lee Z Fu K Niihara Extreme Energy-Density Research Institute Nagaoka University of Technology Niigata 940-2188 Japan Department of Environmental Engineering Sun Moon University Chungnam 336-708 Korea State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

Silver nanoparticles were prepared by pulsed wire discharge (PWD) using silver wire in deionized water at various relative energy (K) from 10 to 98, which is ratio of the charged energy of the capacitor in the electrical circuit to the vaporization energy of the wire. From energy deposition calculated by the measured voltage and current waveforms, deposited energy of the wire was increased with increasing K. From X-ray diffraction (XRD) analysis, prepared nanoparticles were phase identified as silver. From transmission electron microscopy observations, the shape of prepared silver nanoparticles were spherical and the median particle diameter (D50) and the geometric standard deviation (σg) were calculated from the particle distribution. D50 was decreased from 34 to 19 nm with increasing K. The particle size in prepared by PWD in liquid media can be controlled by K.

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The RASSP Program: Origin, Concepts, and Status: An Introduction to the Issue

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Journal of VLSI Signal Processing Systems for Signal, Image, and Video technology 1997年第1-2期15卷 7-27页

作者： Richards, Mark A. Gadient, Anthony Frank, Geoffrey A. Harr, Randolph Georgia Tech. Research Institute Atlanta GA 30332-0856 United States South Carolina Research Authority Charleston SC 29464 5300 International Blvd. United States Research Triangle Institute Research Triangle Park NC P.O. Box 12194 United States Def. Adv. Research Projects Agency Electronics Technology Office Arlington VA 22203-1714 3701 N. Fairfax Drive United States Georgia Tech. United States Stanford University United States Sensors Electromagnetic Applic. Lab. Georgia Tech. Research Institute United States Signal Processing Branch SEAL's Radar Systems Division United States Georgia Tech's Sch. Elec. Comp. Eng. Georgia State of Georgia United States Atlanta Section IEEE United States University of Virginia United States Wright State University United States Carnegie Mellon University United States United States Air Force (USAF) United States AF Wright Aero. Avionics Laboratory South Carolina Research Authority Advanced Technology Group United States Intl. Electro-Tech. Commn. W. Natl. Electronics Mfg. Inititative Sch. of Elec. and Comp. Engineering Georgia Institute of Technology United States Inst. of Elec. and Electronics Eng. Association for Computing Machinery Amer. Assoc. for Artif. Intelligence United States University of North Carolina Chapel Hill NC United States Research Triangle Institute United States Electronics Technology Office United States Synopsys Corp.'s Logic Modeling Grp. United States Case Western Reserve University United States

The Rapid Prototyping of Application Specific Signal Processors (RASSP) program is a multi-year DARPA/Tri-Service initiative intended to dramatically improve the process by which complex digital systems, particularly embedded digital signal processors, are designed, manufactured, upgraded, and supported. This paper reviews the genesis of the RASSP program, considering both the problems that defined the need for the program, and the historical conditions under which it began. The RASSP program is then presented from two viewpoints. The first is programmatic, covering the goals and constraints of the program, and describing the roles of the various program participants. The second is technical, covering the major concepts upon which the developing RASSP approach to design is based and showing how the detailed technical discussions contained in the other papers in this issue of the Journal of VLSI Signal Processing relate to one another and fit into an overall development concept. The paper closes with a review of the status of the program as of this writing (Summer 1996).

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Electric tweezer for single microscopic particle trapping

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Chinese Chemical Letters 2024年

作者： Hui Li Zhenjie Zhao Bingqiang Ji Jun Ma Xuwu Zhang Jingzhao Chen Zhangran Ye Zuankai Wang Liqiang Zhang Jianyu Huang Yingdan Liu Clean Nano Energy Center State Key Lab of Metastable Materials Science and Technology and College of Materials Science and Engineering Yanshan University Qinhuangdao 066004 China Center for Advanced Structural Materials State Key Lab of Metastable Materials Science and Technology and College of Materials Science and Engineering Yanshan University Qinhuangdao 066004 China School of Astronautics Beihang University Beijing 100191 China Nano-biotechnology Key Lab of Hebei Province Yanshan University Qinhuangdao 066004 China Department of Mechanical Engineering The Hong Kong Polytechnic University Hong Kong 999077 China

Trapping and manipulating microscopic particles (micron or nano) in a liquid environment are of great significance for research and applications in nanoscience, engineering, and biomedicine. Although optical tweezers, magnetic tweezers, acoustic tweezers, etc. have been successfully developed, it is still challenging to separate, select, and manipulate micron and submicron particles with comparable morphologies and sizes in trace amounts of liquids with high viscosity and extremely tiny concentrations. Herein, an electric tweezer with measurable force was introduced in an environmental transmission electron microscope (ETEM) for trapping a single submicron particle in high viscosity liquids. The critical voltages for trapping SiO2 and TiO2 spheres were determined to be 75 V and 25 V, respectively, due to their dielectric characteristics. As a result, although TiO2 particles exhibited a similar size and morphology, they were able to be successfully separated from a mixed suspension of SiO2 and TiO2. Moreover, by applying a reasonable bias voltage to the electric tweezer and customizing the size and shape of the tweezer tip, individual 500, 750, and 1000 nm TiO2 spheres could be easily trapped from the corresponding TiO2 suspension. The displacements of atomic force microscope (AFM) cantilevers indicated that the forces to trapped a single particle gradually increased with the diameter of the particles. Additionally, the electric tweezer could precisely manipulate a single particle, and stack a specific structure on the top of the electric tweezer. When the electric tweezer was combined with an optical microscope, it could successfully transfer a 5 μm SiO2 sphere to a HeLa cell. Precisely trapping and manipulating micron and submicron particles is the foundation for fabricating microdevices to achieve specific functions, and it also show great potential for use in biological applications.

关键词： Electric tweezers Single particle trapping Precisely manipulation In-situ TEM Microdevices assembly

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Front Cover: Tailoring Electrolyte Distributions to Enable High-performance Li3PS4-based All-solid-state Batteries under Different Operating Temperatures (Chem. Asian J. 12/2023)

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Chemistry – An Asian Journal 2023年第12期18卷

作者： Chaochao Wei Dian Yu Xiangling Xu Ru Wang Jiayang Li Jinyan Lin Shaoqing Chen Prof. Long Zhang Prof. Chuang Yu School of Chemistry and Chemical Engineering Huazhong University of Science and Technology Wuhan 430074 P. R. China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan 430074 P. R. China Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen 518055 Guangdong P. R. China College of Physics and Energy Fujian Normal University Fuzhou 350117 P. R. China

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[email protected] core-shell nanowires towards oxygen reduction reaction

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Chemical engineering Journal 2021年 421卷

作者： Qi Xue Hui-Ying Sun Ya-Nan Li Ming-Jun Zhong Fu-Min Li Xinlong Tian Pei Chen Shi-Bin Yin Yu Chen Key Laboratory of Macromolecular Science of Shaanxi Province Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education) Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi’an 710062 PR China State Key Laboratory of Marine Resource Utilization in South China Sea Hainan Provincial Key Lab of Fine Chemistry School of Chemical Engineering and Technology Hainan University Haikou 570228 PR China MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials Guangxi University Nanning Guangxi 530004 PR China

Noble metal based one-dimensionally (1D) bimetallic nanostructures are attracting increasing interest in energy conversion field because of their structural advantages and tunable chemical composition. At present, the facile and efficient synthesis of high-quality Au-core noble metal-shell nanowires still maintains the challenge. Herein, we develop a feasible one-pot chemical-reduction strategy to rapidly synthesize high-quality [email protected] core–shell nanowires ( [email protected] CSNWs) in 1-naphthol ethanol solution and explore their potential application in electrocatalysis. Expermattial results show the formation core–shell structure originates from the deposition-growth of Ir atoms at preferentially generated Au nanowires surface. When using as an electrocatalyst towards oxygen reduction reaction (ORR) in alkaline media, [email protected] CSNWs show Pt-like ORR electroactivity due to the compositional synergism effect and structural advantages of 1D nanowires, accompanying with excellent durability and extremely enhanced methanol tolerance towards ORR.

关键词： Low temperature fuel cells Pt-free electrocatalyst Core-shell structure Methanol tolerance Oxygen reduction reaction

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