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含炔键的聚合物给体材料设计合成及在有机太阳能电池中的性能研究

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高分子学报 2024年第1期55卷 48-57页

作者：李大伟马雪晴崔新悦陈亚男魏楠言行李翠红刘玉强刘亚辉薄志山北京师范大学化学学院能量转换与存储材料北京市重点实验室北京100875 青岛大学纺织服装学院生物多糖纤维成形与生态纺织国家重点实验室青岛266071

利用结构简单、成本低廉的初始原料,设计合成了主链含炔键的聚合物给体材料PBEA-F和PBEA.由于炔键的强吸电子能力,分子的最高占有轨道能级(HOMO)得以降低,使得聚合物的带隙变宽.同时,引入炔键的聚合物给体材料与受体小分子材料BTP-eC9-4... 详细信息

利用结构简单、成本低廉的初始原料,设计合成了主链含炔键的聚合物给体材料PBEA-F和PBEA.由于炔键的强吸电子能力,分子的最高占有轨道能级(HOMO)得以降低,使得聚合物的带隙变宽.同时,引入炔键的聚合物给体材料与受体小分子材料BTP-eC9-4F共混制备有机太阳能电池器件,可实现较低的非辐射能量损失与高的开路电压(open circuit voltage,voc).最终基于PBEA的器件可得到0.91 ev的voc、20.70 mA/cm^(2)的短路电流密度(short-circuit current density,Jsc)和10.39%的能量转化效率(power conversion efficiency,PCE),远高于PBEA-F器件的PCE (5.50%).

关键词：有机太阳能电池炔键给体材料简单易合成

微波离子推力器中磁场发散区电子加热模式研究

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物理学报 2024年第9期73卷 199-203页

作者：付瑜亮张思远杨谨远孙安邦王亚楠西安交通大学电工材料电气绝缘全国重点实验室西安710049

在微波离子推力器的磁场结构设计中,一般认为增大磁镜区的面积能够约束更多电子,有利于提高能量利用率;减小发散区面积能够减少电子在壁面的损失,有利于降低放电损耗.随着一体化仿真研究深入,发现利用Child-Langmuir鞘层的特性可约束电... 详细信息

在微波离子推力器的磁场结构设计中,一般认为增大磁镜区的面积能够约束更多电子,有利于提高能量利用率;减小发散区面积能够减少电子在壁面的损失,有利于降低放电损耗.随着一体化仿真研究深入,发现利用Child-Langmuir鞘层的特性可约束电子,使其在鞘层与磁镜间往复运动获能.对此,本文设计了适用于1 cm磁阵列微波离子推力器的磁场结构,并对其初始放电和束流引出过程进行了一体化仿真,对比阐明了电子在磁场发散区受Child-Langmuir鞘层、天线表面鞘层和磁镜共同约束下的获能模式.该获能模式可提升磁场发散区的电子温度,促进电离,提升栅极前等离子体密度,进而提升束流密度.仿真结果表明,在氙气流量0.3 sccm(1 sccm=1 mL/min),微波功率为1 W,栅极电压φ_(sc)/φ_(ac)=300 v/–50 v条件下,磁阵列微波离子推力器的电流密度较2 cm微波离子推力器提升57.9%.本文从理论上对磁场发散区电子加热模式进行了验证,研究结果将为微波离子推力器优化设计提供理论依据,促进微波离子推力器性能提升.

关键词：电子回旋共振离子推力器电子约束电子加热

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Investigation of Al plasmas from thin foils irradiated by high-intensity extreme ultraviolet

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Matter and Radiation at Extremes 2017年第3期2卷 129-138页

作者： E.v.Grabovski P.v.Sasorov A.P.Shevelko v.v.Aleksandrov S.N.Andreev M.M.Basko A.v.Branitski A.N.Gritsuk G.S.volkov ya.N.Laukhin K.N.Mitrofanov G.M.Oleinik A.A.Samokhin v.P.Smirnov I.Yu.Tolstikhina I.N.Frolov O.F.yakushev State Research Center of the Russian Federation Troitsk Institute for Innovation and Fusion Research 108840TroitskMoscowRussia Keldysh Institute of Applied Mathematics of the Russian Academy of Sciences Miusskaya pl.4125047MoscowRussia P.N.Lebedev Physical Institute of the Russian Academy of Sciences Leninsky pr.53Moscow119991Russia

Dynamics and spectral transmission of Al plasma produced by extreme ultraviolet(EUv)irradiation of 0.75-mm thick Al foil is *** EUv radiation with the peak power density in the range of 0.19-0.54 TW/cm 2 is provided by Z-pinch formed by W multiwire array implosion in the Angara-5-1 *** of the experiment ensures that there are no plasma fluxes from the pinch toward the Al foil and *** same EUv source is used as a back illuminator for obtaining the absorption spectrum of Al plasma in the wavelength range of 5e24 *** comprises absorption lines of ions Al^(4+),Al^(5+),Al^(6+),Al^(7+).Analysis of relative intensities of the lines shows that those ions are formed in dense Al plasma with a temperature of~20 *** of Al plasma has been investigated with transverse laser *** have also performed radiation-gas-dynamics simulations of plasma dynamics affected by external radiation,which includes self-consistent radiation transport in a plasma *** simulations show good agreement with an experimental absorption spectrum and with experimental data concerning plasma dynamics,as well as with the analysis of line absorption *** confirms the correctness of the physical model underlying these simulations.

关键词： Z-pinch Dense plasma transparency

Research agenda for the Russian Far East and utilization of multiplatform comprehensive environmental observations

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International Journal of Digital Earth 2021年第3期14卷 311-337页

作者： Tuukka Petäjä Kirill S.Ganzei Hanna K.Lappalainen Ksenia Tabakova Risto Makkonen Jouni Räisänen Sergey Chalov Markku Kulmala Sergej Zilitinkevich Petr ya Baklanov Renat B.Shakirov Natalia v.Mishina evgeny G.Egidarev Igor I.Kondrat’ev Institute for Atmospheric and Earth System Research/Physics Faculty of ScienceUniversity of HelsinkiHelsinkiFinland Department of Cryosphere Tyumen State University TyumenRussia Pacific Geographical Institute of the Far Eastern Branch of Russian Academy of Sciences VladivostokRussia Finnish Meteorological Institute HelsinkiFinland Faculty of Geography Lomonosov Moscow State UniversityMoscowRussia v.I.Ilyichov Pacific Oceanological Institute of the Far Eastern Branch of Russian Academy of Sciences VladivostokRussia

The Russian Far East is a region between China and the Russian Arctic with a diverse climatological,geophysical,oceanic,and economical *** southern region is located in the Far East monsoon sector,while the northern parts are affected by the Arctic Ocean and cold air masses penetrating far to the *** economic activities and traffic connected to the China Belt and Road Initiative together with climate change are placing an increased pressure upon the Russian Far East *** is an urgent need to improve the capacity to measure the atmospheric and environmental pollution and analyze their sources and to quantify the relative roles of local and transported pollution emissions in the *** the paper,we characterize the current environmental and socio-economical landscape of the Russian Far East and summarize the future climate scenarios and identify the key regional research *** discuss the research infrastructure concept,which is needed to answer the identified research *** integrated observations,filling in the critical observational gap at the Northern Eurasian context,are required to provide state-of-the-art observations and enable follow-up procedures that support local,regional,and global decision making in the environmental context.

关键词： Russian Far East greenhouse gases aerosol particles insitu observations Earth observation data

Energy Estimates on Existence of Extremals for Trudinger–Moser Inequalities

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Acta Mathematica Sinica,English Series 2020年第7期36卷 829-841页

作者： ya Min WANG School of Mathematics Renmin University of ChinaBeijing 100872P.R.China

LetΩbe a smooth bounded domain in R2,W01,2(Ω)be the standard Sobolev *** the method of energy estimate developed by Malchiodi–Martinazzi(***.,16,893–908(2014)),Mancini–Martinazzi(*** Differential Equations,56,94(2017))and Mancini–Thizy(*** Equations,266,1051–1072(2019)),we reprove the results of Carleson–Chang(***.,110,113–127(1986)),Flucher(***.,67,471–497(1992)),Li(Acta ***.,22,545–550(2006))and Su(***.,in press).Namely,for any real numberα≤1,the supremum■can be achieved by some function v∈W01,2(Ω)with║?v║22≤4π.

关键词： space. Existence 1,2

Effect of Polymer Chain Regularity on the Photovoltaic Performance of Organic Solar Cells

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Chinese Journal of Polymer Science 2022年第8期40卷 996-1002,I0012页

作者： Hang Wang Hao Lu ya-Nan Chen Andong Zhang Yuqiang Liu Cai’e Zhang yahui Liu Xinjun Xu Zhishan Bo College of Textiles&Clothing State Key Laboratory of Bio-fibers and Eco-textilesQingdao UniversityQingdao266071China Beijing Key Laboratory of Energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing100875China College of Materials Science and Engineering Shenzhen UniversityShenzhen518060China

In this work,regio-regular and random polymers(reg-PTF and ran-PTF)comprising benzodithiophene and 3-fluorothiophene units are developed to investigate the influence of polymer chain regularity on the photovoltaic ***,reg-PTF exhibits higher HOMO energy level(∼0.2 ev)than that of ran-PTF due to the more ordered molecular structure and higher *** the result,the HOMO energy level offset between donor and acceptor can be well controlled by selecting different *** BTP-ec9-4F with a much deep HOMO energy level as acceptor,reg-PTF-based devices display an inferior PCE of 7.66%compared with ran-PTF based ones(11.78%)due to the too large HOMO energy levels *** blending with Y18-1F,the PCE of reg-PTF-based devices is increased to 13.23%due to the appropriate energy *** comparison,the ran-PTF-based devices nearly do not work because of the negative HOMO energy levels *** work indicates that both the polymer chain regularity and the energy level offset between the donor and acceptor material are important to the performance of organic solar cells.

关键词： Organic solar cells Polymer donor Regio-regular polymer Random polymer Energy level offset

Electrical Characteristics of Co/n-Si Schottky Barrier Diodes Using I -- v and C -- v Measurements

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Chinese Physics Letters 2009年第6期26卷 254-257页

作者： G. Güler OE. Güllü S. Karatas OE. F. Bakkaloglu Department of Physics Faculty of Education University of Adiyaman 02100 Adiyaman Tarkey Department of Physics Faculty of Sciences and Arts University of Barman 72060 Barman Turkey Department of Physics Faculty of Sciences and Arts University of Kahramanmaras Sütcü imam 46100 Kahramanmaras Turkey Department of Engineering Physics Faculty of Engineering Physics University of Gaziantep 27310 Gaziantep Turkey

Electrical characteristics of Co/n-Si Schottky barrier diodes are analysed by current- voltage （I- v） and capacitancevoltage （C- v） techniques at room temperature. The electronic parameters such as ideality factor, barrier height and average series resistance are determined. The barrier height 0. 76 ev obtained from the C - v measurements is higher than that of the value 0. 70 ev obtained from the I - v measurements. The series resistance Rs and the ideality factor n are determined from the d ln（ I） /dv plot and are found to be 193.62 Ω and 1.34, respectively. The barrier height and the Rs value are calculated from the H（I） - I plot and are found to be 0.71 ev and 205.95Ω. Furthermore, the energy distribution of the interface state density is determined from the forward bias I - v characteristics by taking into account the bias dependence of the effective barrier height. The interface state density Nss ranges from 6.484×10^11 cm^-2ev^-1 in （Ec - 0.446） ev to 2.801×10^10 cm^-2ev^-1 in （Ec - 0.631） ev, of the Co/n-Si Schottky barrier diode. The results show the presence of a thin interracial layer between the metal and the semiconductor.

关键词： No English Keywords

A functional hyperbranched binder enabling ultra-stable sulfur cathode for high-performance lithium-sulfur battery

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Journal of Energy Chemistry 2020年第11期29卷 63-72页

作者： Xiang Luo Xianbo Lu Xiaodong Chen ya Chen Chunyang Yu Dawei Su Guoxiu Wang Lifeng Cui School of Materials Science and Engineering Dongguan University of TechnologyDongguan 523808GuangdongChina Center for Clean Energy Technology School of Mathematical and Physical ScienceFaculty of ScienceUniversity of Technology SydneyNSW 2007Australia R&D Center Shanghai Kingfa Sci.&Tech.Co.Ltd.Shanghai 201714China Department of Applied Chemistry School of ScienceXi'an Jiaotong UniversityXi'an 710049ShaanxiChina School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China School of Chemistry&Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Binders are of vital importance in stabilizing the cathodes to enhance the cycling stability of lithiumsulfur(Li-S) batteries. However, conventional binders are typically confronted with the drawback of inability for adsorbing lithium polysulfide(Li PS), thus resulting in severe active material losing and rapid capacity fading. Herein, a novel water-soluble hyperbranched poly(amidoamine)(HPAA) binder with controllable hyperbranched molecular structure and abundant amino end groups for Li-S battery is designed and fabricated, which can improve efficient adsorption for Li PS and stability of the sulfur cathodes. Besides, the strong intermolecular hydrogen bonds in HPAA binder can contribute to the structural stability of S cathode and integration of the conductive paths. Therefore, the Li-S battery with this functional binder exhibits excellent cycle performance with a capacity retention of 91% after 200 cycles at 0.1 *** at a high sulfur loading of 5.3 mg cm-2, a specific capacity of 601 mA h g-1 can also be *** functional theory(DFT) calculation further demonstrates that the enhanced electrochemical stability derives from the high binding energy between amino groups and LiP S and the wide electrochemical window(6.87 e v) of HPAA molecule. Based on the above all, this functional polymer will lighten a new species of binders for eco-friendly sulfur cathodes and significantly promote the practical applications of high-performance Li-S batteries.

关键词： Functional binder Hyperbranched polymer Sulfur cathode Polysulfide adsorption Lithium-sulfur battery

First commissioning results of the coherent scattering and imaging endstation at the Shanghai soft X-ray free-electron laser facility

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Nuclear Science and Techniques 2022年第9期33卷 48-58页

作者： Jia-Dong Fan ya-Jun Tong Yong-Gan Nie Zi-Chen Gao Bo He Hui Luan Dong-Hao Lu Jian-Hua Zhang Di-Fei Zhang Xin-Ye Yuan Jia-Hua Chen Zhi Guo Tao Liu Meng Zhang Chao Feng Hai-Xiao Deng Bo Liu Zhen-Tang Zhao Zhi Liu Huai-Dong Jiang Center for Transformative Science ShanghaiTech UniversityShanghai 201210China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China

The Shanghai soft X-ray free-electron laser(SXFEL)user facility project started in 2016 and is expected to be open to users by *** aims to deliver ultra-intense coherent femtosecond X-ray pulses to five endstations covering a range of 100–620 ev for ultrafast X-ray *** undulator lines are designed and constructed,based on different lasing modes:self-amplified spontaneous emission and echo-enabled harmonic *** coherent scattering and imaging(CSI)endstation is the first of five endstations to be commissioned *** focuses on high-resolution single-shot imaging and the study of ultrafast dynamic processes using coherent forward scattering *** the single-shot holograms and coherent diffraction patterns were recorded and reconstructed for nanoscale imaging,indicating the excellent coherence and high peak power of the SXFEL and the possibility of‘‘diffraction before destruction’’experiments at the CSI *** this study,we report the first commissioning results of the CSI endstation.

关键词： X-ray free electron laser Coherent diffraction imaging Fourier transform holography Single-shot imaging Phase retrieval