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Alkoxy substituted benzodithiophene-alt-fluorobenzotriazole copolymer as donor in non-fullerene polymer solar cells

Science China Chemistry 2016年第10期59卷 1317-1322页

作者： Haijun Bin lian Zhong Zhi-Guo zhang liang Gao Yankang Yang Lingwei xue Jing zhang Zhanjun zhang Yongfang Li Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

A new benzodithiophene （BDT）-alt-fluorobenzotriazole （FBTA） D-A copolymer J40 was designed and synthesized by introducing 2-octyldodecyloxy side chains on its BDT units, for expanding the family of the BDT- alt-FBTA-based copolymers and investigating the side chain effect on the photovoltaic performance of the polymer in non-fullerene polymer solar cells （PSCs）. J40 exhibits complementary absorption spectra and matched electronic energy levels with the n-type organic semiconductor （n-OS）（3,9-bis（2-methylene-（3-（1,1-dicyanomethylene）-indanone））-5,5,11,11-tetrakis（4-hexylphenyl）-dithieno[2,3-d：2＇,3＇-d＇]-s- indaceno[1,2-b：5,6-b＇]dithiophene）（ITIC） acceptor, and was used as polymer donor in the non-fullerene PSCs with ITIC as acceptor. The power conversion efficiency （PCE） of the PSCs based on J40：ITIC （1：1, w/w） with thermal annealing at 120 ~C for l0 min reached 6.48% with a higher open-circuit voltage （Voc） of 0.89 V. The high Voc of the PSCs is benefitted from the lower-lying highest occupied molecular orbital （HOMO） energy level of J40. Although the photovoltaic performance of the polymer J40 with alkoxy side chain is lower than that of J60 and J61 with alkylthio-thienyl conjugated side chains, the PCE of 6.48% for the J40-based device is still a relatively higher photovoltaic efficiency in the non-fullerene PSCs reported so far. The results indicate that the family of the BDT-alt-FBTA-based D-A copolymers are high performance polymer donor materials for non-fullerene PSCs and the side chain engineering plays an important role in the design of high performance polymer donors in the non-fullerene PSCs.

关键词： non-fullerene polymer solar cells conjugated D-A copolymers n-type organic semiconductor ITIC

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Phylogenetic Analysis of mtDNA from the Ancient Human of Yuan Dynasty in Inner Mongolia in China

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Chemical Research in Chinese Universities 2006年第2期22卷 177-180页

作者： FU Yu-qin XU xue-lian zhang Xiao-lei zhang Quan-chao ZHOU Hui ZHU Hong Ancient DNA Laboratory Research Center for Chinese Frontier Archaeology Jilin UniversityChangchun 130012 P. R. China College of Life Science Jilin University 130021 P. R. China

A study of the genetic structure of an ancient human excavated from the Yikeshu site of Yuanshangdu ancient city in Inner Mongolia and the relationships between the ancient population and the extant populations was carried out. Sequences of the control region and coding region of mtDNA from the ancient human were analyzed by using direct sequencing and restriction-fragment length polymorphism （RFLP） methods, Phylogenetic analysis and multidimensional scaling analysis were also performed on the mtDNA data of the ancient population and 12 extant populations. These results show that the ancient individuals of Yikeshu site can be assigned to D, G, B and Z haplogroups that are prevalent in Duars and Mongolians from Inner Mongolia. The ancient population is also closer to Duar and Mongolian populations in genetic distance than other compared populations. This study reveals that the ancient population from Yikeshu site in the Yuan Dynasty shares a common ancestor with Mongolic-speaking Daur and Mongolian tribes.

关键词： MtDNA Polymorphism Phylogenetic analysis

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Operando measurement of lattice deformation profiles of synchrotron radiation monochromator

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Nuclear Science and Techniques 2024年第7期35卷 8-19页

作者： Yue zhang Zhong-liang Li Shang-Yu Si lian.xue Hong-Xin Luo Xiao-Wei zhang Jun Hu Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai201204China ShanghaiTech University Shanghai201210China University of the Chinese Academy of Sciences Beijing100049China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of ScienceBeijing100049China

This study presents a new method for characterizing the thermal lattice deformation of a monochromator with high precision under service conditions and first reports the operando measurements of nanoscale thermal lattice deformation on a double-crystal monochromator at different incident *** nanoscale thermal lattice deformation of the monochromator first crystal was obtained by analyzing the intensity of the distorted DuMond *** diagrams of the 333 diffraction index,sensitive to lattice deformation,were obtained directly using a 2D detector and an analyzer crystal orthogonal to the *** increasing incident power and power density,the maximum height of the lattice deformation increased from 3.2 to 18.5 nm,and the deformation coefficient of the maximum height increased from 1.1 to 3.2 nm/*** maximum relative standard deviation was 4.2%,and the maximum standard deviation was 0.1 *** on the measured thermal deformations,the flux saturation phenomenon and critical point for the linear operation of the monochromator were predicted with increasing incident *** study provides a simple solution to the problem of the lower precision of synchrotron radiation monochromator characterizations compared to simulations.

关键词： Synchrotron radiation Monochromator Lattice deformation X-ray dynamic diffraction

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Multi-Wavelength Conversion Based on Single Wavelength Results in Phase Retardation Measurement

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Chinese Physics Letters 2013年第3期30卷 60-62页

作者： CHEN Wen-xue zhang Shu-lian LONG Xing-Wu Department of Opto-electronic Engineering College of Opto-electronic Science and EngineeringNational University of Defense TechnologyChangsha 410073 The State Key Lab of Precision Measurement Technology and Instrument Department of Precision InstrumentsTsinghua UniversityBeijing 100084

We introduce an instrument for single wavelength measurement of phase retardation based on the laser feedback phenomenon.A method of multi-wavelength conversion for this instrument is proposed and the conversion results are *** calibration is used to eliminate the conversion *** experimental results show that the maximum error after conversion is 0.26°.Through the present work,the application of laser feedback instrument for single wavelength measurement of a wave plate is expanded to the multi-wavelength *** will expand the application area of the instruments.

关键词： instrument eliminate expanded

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Spraying Arginine at 5 Days before Harvest Delays Postharvest Broccoli Senescence via Nutrient Accumulation

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食品科学 2025年第1期46卷 131-141页

作者： SUN Yupeng CHEN Ying SHANG Qingwen GUO Yanyin zhang Yuxiao WANG Yunqiao xue Qingyue College of Agricultural Engineering and Food Science Shandong University of TechnologyZibo 255049China Zichuan District Agricultural and Rural Affairs Service Center Zibo 255049China

To determine the effects of preharvest arginine spraying on the nutritional level of broccoli and the mechanism of action of arginine in improving the storage quality of broccoli,arginine spraying(5 mmol/L)was conducted at 0,1,3,and 5 days before *** appearance,respiration rate,mass-loss rate,electrolyte leakage,glucosinolate,ascorbic acid,total phenol,total flavonoid,total sugar and sucrose contents,and sucrose phosphate synthase(SPS),invertase(INV),sucrose synthase synthesis(SSS)and cleavage(SSC)activities of broccoli samples were observed after 0,2,4,6,8,and 10 days of *** results showed that spraying arginine at 5 days preharvest(5-ARG)helped to inhibit broccoli respiration during storage,delay electrolyte leakage,and maintain broccoli ***,during the growth stage,total sugar accumulation was higher in the 5-ARG *** addition,during the storage period,sucrose synthesis was accelerated,while sucrose cleavage was inhibited,resulting in more sucrose retention in postharvest *** conclusion,5-ARG resulted in the accumulation of more nutrients during the growth process and effectively delayed the quality decline during storage,thereby prolonging the shelf life of ***,this study provides a theoretical basis for improving postharvest storage characteristics of broccoli through preharvest treatments.

关键词： arginine broccoli preharvest spraying nutrient accumulation storage quality postharvest senescence

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Influence of drought hardening on the resistance physiology of potato seedlings under drought stress

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Journal of Integrative Agriculture 2018年第2期17卷 336-347页

作者： zhang Shu-han XU xue-feng SUN Ye-min zhang Jun-lian LI Chao-zhou Gansu Key Laboratory of Crop Genetics & Germplasm Enhancement College of Life Sciences and Technology Gansu Agricultural University College of Horticulture Gansu Agricultural University

In this paper, the influence of drought hardening on the growth, development, resistance physiology, leaf microstructure and stomatal behavior of potato seedlings under drought stress was studied, and the mechanism of drought hardening improvement of potato seedling drought resistance was elucidated. We found that drought stress had several adverse effects on potato seedlings, yet drought hardening alleviated the decrease in relative water content（RWC）, net photosynthetic rate（Pn） and chlorophyll content and inhibited the increase in relative electric conductivity and malondialdehyde（MDA） content. Compared with contrast seedlings, drought-hardened seedlings also had enhanced root vigor, increased antioxidant enzyme activity and higher levels of abscisic acid（ABA）, proline（Pro）, soluble sugars and polyamines（PAs） under drought stress. In addition, the stomatal density of potato seedling leaves increased significantly, while the leaf area, stomatal size and stomatal aperture decreased with drought hardening treatment. These changes led to reduced leaf transpiration rate（Tr） and improved water utilization efficiency（WUE）. The changes in leaf microstructure also had a positive effect on the drought resistance of the drought-hardened potato seedlings. So it can be concluded that through increasing the content of some endogenous hormones, osmotic regulatory substances and the activities of antioxidant enzymes, the resistance physiology of drought-hardened potato seedlings was enhanced.

关键词： drought drought hardening potato resistance physiology

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Diffusion dynamics in branched spherical structure

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Chinese Physics B 2022年第11期31卷 172-178页

作者： Kheder Suleiman xue-Lan zhang Sheng-Na Liu lian-Cun Zheng School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China School of Mathematics and Physics University of Science and Technology BeijingBeijing 100083China

Diffusion on a spherical surface with trapping is a common phenomenon in cell biology and porous *** this paper,we study the diffusion dynamics in a branched spherical structure and explore the influence of the geometry of the structure on the diffusion *** process is a spherical movement that occurs only for a fixed radius and is interspersed with a radial motion inward and outward the *** scenarios govern the transport process in the spherical cavity:free diffusion and diffusion under external *** diffusion dynamics is described by using the concepts of probability density function(PDF)and mean square displacement(MSD)by Fokker–Planck equation in a spherical coordinate *** effects of dead ends,sphere curvature,and velocity on PDF and MSD are analyzed numerically in *** find a transient non-Gaussian distribution and sub-diffusion regime governing the angular *** results show that the diffusion dynamics strengthens as the curvature of the spherical surface increases and an external force is exerted in the same direction of the motion.

关键词： anomalous diffusion Fokker-Planck equation branched spherical structure

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Wideband Circularly Polarized Substrate-Integrated Waveguide Aperture-Coupled Metasurface Antenna Array for Millimeter-Wave Applications

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Chinese Journal of Electronics 2024年第6期33卷 1468-1477页

作者： Jiwei lian Chun GENG xue LU Dazhi DING School of Microelectronics(School of Integrated Circuits) Nanjing University of Science and Technology State Key Laboratory of Millimeter Waves Southeast University Qian xuesen College Nanjing University of Science and Technology

A wideband circularly polarized(CP) aperture-coupled metasurface antenna operating at millimeterwave frequency spectrum in substrate-integrated waveguide(SIW) technology is proposed. The proposed metasurface antenna is composed of two substrates. The first substrate contains an end-shorted SIW section with a slot *** introduced metasurface is printed on the top of the second substrate. The metasurface is comprised of 3 × 3 unit cells, each of which contains two interconnected patches and two parasitic patches. The working mechanism of the proposed metasurface antenna is illustrated in details. The proposed metasurface antenna has wide impedance bandwidth and axial ratio(AR) bandwidth, which are 66.7% and 40%, respectively. Using the proposed metasurface antenna, a 4 × 4 CP metasurface antenna array with an impedance bandwidth of 24%, an AR bandwidth of 30%, and a peak gain of 18.7 dBic in simulation is developed in this paper for millimeter-wave applications.

关键词： Antenna measurements Parametric study Millimeter wave technology Metasurfaces Aperture antennas Impedance Broadband antennas Substrates Wideband Antenna arrays

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不同加载速度下巴厘菠萝果皮穿刺力学特性研究

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农机化研究 2025年第3期47卷 169-175页

作者：薛忠潘睿张秀梅中国热带农业科学院南亚热带作物研究所广东湛江524091 中国热带农业科学院农业机械研究所广东湛江524091 农业农村部热带果树生物学重点实验室广东湛江524091

对菠萝果皮穿刺力学特性进行研究,旨在为果实品质评价提供参考,为菠萝采收、加工设备优化改进提供参考,为减轻菠萝果损伤提供理论依据。以巴厘菠萝果皮为研究对象,根据菠萝生长规律将果皮划分为上、中、下3个部位,基于WSW-50E微机控制... 详细信息

对菠萝果皮穿刺力学特性进行研究,旨在为果实品质评价提供参考,为菠萝采收、加工设备优化改进提供参考,为减轻菠萝果损伤提供理论依据。以巴厘菠萝果皮为研究对象,根据菠萝生长规律将果皮划分为上、中、下3个部位,基于WSW-50E微机控制电子万能试验机,选取2、5、10、20、50 mm/min等5个加载速度对菠萝不同部位进行穿刺力学特性试验,分析不同加载速度、不同穿刺部位和不同穿刺压头截面对果皮穿刺强度的影响。试验结果表明:果皮中部穿刺强度最低,下部穿刺强度最高;压头截面与不同穿刺部位对果皮穿刺强度均呈现负相关极显著(p<0.01),不同穿刺部位对果皮穿刺强度均呈现正相关极显著(p<0.01),压头截面与穿刺部位对穿刺强度影响极显著(p<0.01)。由此得出结论:果皮穿刺强度与压头截面、穿刺部位呈极显著相关关系,加载速度与穿刺强度呈不相关关系。

关键词：菠萝果皮加载速度压头截面穿刺强度

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Suppression of leakage effect of Majorana bound states in the T-shaped quantum-dot structure

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Chinese Physics B 2021年第7期30卷 489-497页

作者： Wei-Jiang Gong Yu-Hang xue Xiao-Qi Wang lian-lian zhang Guang-Yu Yi College of Sciences Northeastern UniversityShenyang 110819China Basic department Yingkou Institute of TechnologyYingkou 115014China

We theoretically study the transport properties in the T-shaped double-quantum-dot structure,by considering the dot in the main channel to be coupled to the Majorana bound state(MBS)at one end of the topological superconducting *** is found that the side-coupled dot governs the effect of the MBS on the transport *** its level is consistent with the energy zero point,the MBS contributes little to the conductance ***,the linear conductance exhibits notable changes according to the inter-MBS coupling *** the absence of inter-MBS coupling,the linear conductance value keeps equal to e^(2)/2 h when the level of the side-coupled dot departs from the energy zero ***,the linear conductance is always analogous to the MBS-absent case once the inter-MBS coupling comes into *** findings provide new information about the leakage effect of MBSs in quantum-dot structures.

关键词： Majorana bound states quantum dots conductance antiresonance

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