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One-Dimensional(NH=CINH_(3))_(3)PbI_(5)Perovskite for Ultralow Power Consumption Resistive Memory

Research 2021年第1期2021卷 704-712页

作者： Xuefen Song Hao Yin qing Chang Yuchi Qian Chongguang Lyu Huihua Min Xinrong Zong Chao Liu Yinyu Fang Zhengchun Cheng tianshi qin Wei Huang Lin Wang Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) Nanjing Tech University(Nanjing Tech)30 South Puzhu RoadNanjing 211816China Electron Microscope Laboratory Nanjing Forestry UniversityNanjing 210037China MIIT Key Laboratory of Flexible Electronics(KLoFE) Shaanxi Key Laboratory of Flexible Electronics(KLoFE)Xi’an Key Laboratory of Flexible Electronics(KLoFE)Xi’an Key Laboratory of Biomedical Materials&EngineeringXi’an Institute of Flexible ElectronicsInstitute of Flexible Electronics(IFE)Northwestern Polytechnical UniversityXi’an710072 ShaanxiChina

Organic-inorganic hybrid perovskites(OIHPs)have proven to be promising active layers for nonvolatile memories because of their rich abundance in earth,mobile ions,and adjustable ***,there is a lack of investigation on controllable fabrication and storage properties of one-dimensional(1D)***,the growth of 1D(NH=CINH_(3))_(3)PbI_(5)((IFA)_(3)PbI_(5))perovskite and related resistive memory properties are *** solution-processed 1D(IFA)_(3)PbI_(5)crystals are of welldefined monoclinic crystal phase and needle-like shape with the length of about 6 *** exhibit a wide bandgap of 3 eV and a high decomposition temperature of 206℃.Moreover,the(IFA)_(3)PbI_(5)films with good uniformity and crystallization were obtained using a dual solvent of N,N-dimethylformamide(DMF)and dimethyl sulfoxide(DMSO).To study the intrinsic electric properties of this anisotropic material,we constructed the simplest memory cell composed of only Au/(IFA)_(3)PbI_(5)/ITO,contributing to a high-compacted device with a crossbar array device *** resistive random access memory(ReRAM)devices exhibit bipolar current-voltage(I-V)hysteresis characteristics,showing a record-low power consumption of~0.2 mW among all OIHP-based ***,our devices own the lowest power consumption and“set”voltage(0.2 V)among the simplest perovskite-based memory devices(inorganic ones are also included),which are no need to require double metal electrodes or any additional insulating *** also demonstrate repeatable resistance switching behaviour and excellent retention *** envision that 1D OIHPs can enrich the low-dimensional hybrid perovskite library and bring new functions to low-power information devices in the fields of memory and other electronics applications.

关键词： perovskite inorganic crystallization

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Recent Advances in Two-Dimensional Magnets:Physics and Devices towards Spintronic Applications

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Research 2020年第1期2020卷 187-205页

作者： Vertikasari PNingrum Bowen Liu Wei Wang Yao Yin Yi Cao Chenyang Zha Hongguang Xie Xiaohong Jiang Yan Sun Sichen qin Xiaolong Chen tianshi qin Chao Zhu Lin Wang Wei Huang Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) Nanjing Tech University(Nanjing Tech)30 South Puzhu RoadNanjing 211816China Frontiers Science Center for Flexible Electronics(FSCFE) Shaanxi Institute of Flexible Electronics(SIFE)&Shaanxi Institute of Biomedical Materials and Engineering(SIBME)Northwestern Polytechnical University(NPU)127 West Youyi RoadXi’an 710072China Department of Electrical and Electronic Engineering Southern University of Science and TechnologyShenzhen 518055China Center for Programmable Materials School of Materials Science and EngineeringNanyang Technological UniversitySingapore 639798Singapore

The emergence of low-dimensional nanomaterials has brought revolutionized development of magnetism,as the size effect can significantly influence the spin *** the first demonstration of truly two-dimensional magnetic materials(2DMMs)in 2017,a wide variety of magnetic phases and associated properties have been exhibited in these 2DMMs,which offer a new opportunity to manipulate the spin-based devices efficiently in the ***,we focus on the recent progress of 2DMMs and heterostructures in the aspects of their structural characteristics,physical properties,and spintronic ***,the microscopy characterization of the spatial arrangement of spins in 2D lattices is ***,the optical probes in the light-matter-spin interactions at the 2D scale are ***,particularly,we systematically summarize the recent work on the electronic and spintronic devices of *** the section of electronic properties,we raise several exciting phenomena in 2DMMs,i.e.,long-distance magnon transport,field-effect transistors,varying magnetoresistance behavior,and(quantum)anomalous Hall *** the section of spintronic applications,we highlight spintronic devices based on 2DMMs,e.g.,spin valves,spin-orbit torque,spin field-effect transistors,spin tunneling field-effect transistors,and spin-filter magnetic tunnel *** last,we also provide our perspectives on the current challenges and future expectations in this field,which may be a helpful guide for theorists and experimentalists who are exploring the optical,electronic,and spintronic properties of 2DMMs.

关键词： arrangement tunneling truly

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High performance flexible Sn-Pb mixed perovskite solar cells enabled by a crosslinking additive

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npj Flexible Electronics 2023年第1期7卷 383-387页

作者： Ya Li Suhao Yan Jiupeng Cao Haoyu Chen Bingxu Liu Jiankai Xie Yuting Shu Fangfang Wang Aifei Wang Jingjin Dong tianshi qin Key Laboratory of Flexible Electronics(KLoFE)&Institute of Advanced Materials(IAM) School of Flexible Electronics(Future Technologies)Nanjing Tech University(Nanjing Tech)211816 NanjingChina

Flexible perovskite solar cells(PSCs)have drawn increasing attention due to their promising applications for wearable electronics and aerospace ***,the efficiency and stability of flexible PSCs still lag behind their rigid ***,we use N,N-dimethyl acrylamide(DMAA)to in situ synthesize cross-linking polymer for flexible Sn–Pb mixed *** can gather at grain boundary as a scaffold to regulate the crystallization of perovskite and reduce *** rigid and flexible Sn–Pb mixed PSCs showed efficiencies of 16.44%and 15.44%,*** addition,the flexible Sn–Pb mixed PSCs demonstrated excellent bending durability,which retained over 80%of the original efficiency after 5000 bending cycles at a radius of 5 mm.

关键词： perovskite mixed bending

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Unveiling the Effects of Interchain Hydrogen Bonds on Solution Gelation and Mechanical Properties of Diarylfluorene-Based Semiconductor Polymers

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Research 2020年第1期2020卷 547-561页

作者： Lubing Bai Yamin Han Chen Sun Xiang An Chuanxin Wei Wei Liu Man Xu Lili Sun Ning Sun Mengna Yu He Zhang Qi Wei Chunxiang Xu Yingguo Yang tianshi qin Linghai Xie Jinyi Lin Wei Huang Center for Supramolecular Optoelectronics(CSO) Key Laboratory of Flexible Electronics(KLOFE)and Institute of Advanced Materials(IAM)Nanjing Tech University(NanjingTech)30 South Puzhu RoadNanjing 211816China State Key Laboratory of Bioelectronics School of Electronic Science and Medical EngineeringSoutheast UniversityNanjing 210096China Center for Molecular Systems and Organic Devices(CMSOD) Key Laboratory for Organic Electronics and Information Displays&Institute of Advanced Materials(IAM)Nanjing University of Posts&Telecommunications9 Wenyuan RoadNanjing 210023China Frontiers Science Center for Flexible Electronics(FSCFE) Shaanxi Institute of Flexible Electronics(SIFE)Shaanxi Institute of Biomedical Materials and Engineering(SIBME)Northwestern Polytechnical University(NPU)127 West Youyi RoadXi’an 710072China Shanghai Synchrotron Radiation Facility(SSRF) Zhangjiang LabShanghai Advanced Research InstituteChinese Academy of Sciences239 Zhangheng RoadShanghai 201204China

The intrinsically rigid and limited strain of most conjugated polymers has encouraged us to optimize the extensible properties of conjugated ***,learning from the hydrogen bonds in glucose,which were facilitated to the toughness enhancement of cellulose,we introduced interchain hydrogen bonds to polydiarylfluorene by amide-containing side *** tuning the copolymerization ratio,we systematically investigated their influence on the hierarchical condensed structures,rheology behavior,tensile performances,and optoelectronic properties of conjugated *** to the reference copolymers with a low ratio of amide units,copolymers with 30%and 40%amide units present a feature of the shearthinning process that resembled the non-Newtonian fluid,which was enabled by the interchain dynamic hydrogen ***,we developed a practical and universal method for measuring the intrinsic mechanical properties of conjugated *** demonstrated the significant impact of hydrogen bonds in solution gelation,material crystallization,and thin film ***,the breaking elongation for P4 was even up to~30%,which confirmed the partially enhanced film ductility and toughness due to the increased amide ***,polymer light-emitting devices(PLEDs)based on these copolymers presented comparable performances and stable electroluminescence(EL).Thin films of these copolymers also exhibited random laser emission with the threshold as low as 0.52μJ/cm^(2),suggesting the wide prospective application in the field of flexible optoelectronic devices.

关键词： bonds conjugated film

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Hole-Transporting Low-Dimensional Perovskite for EnhancingPhotovoltaic Performance

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Research 2021年第1期2021卷 901-911页

作者： Fangfang Wang qing Chang Yikai Yun Sizhou Liu You Liu Jungan Wang Yinyu Fang Zhengchun Cheng Shanglei Feng Lifeng Yang Yingguo Yang Wei Huang tianshi qin Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) Nanjing Tech University(NanjingTech)30 South Puzhu RoadNanjing 211816China Shanghai Synchrotron Radiation Facility(SSRF) Shanghai Advanced Research InstituteShanghai Institute of Applied PhysicsChinese Academy of Sciences239 Zhangheng RoadShanghai 201204China State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(IAM) Nanjing University of Posts&Telecommunications9 Wenyuan RoadNanjing 210023China Frontiers Science Center for Flexible Electronics(FSCFE)&Shaanxi Institute of Flexible Electronics(SIFE) Northwestern Polytechnical University(NPU)127 West Youyi RoadXi’an 710072China Ningbo Institute of Northwestern Polytechnical University 818 Qingyi RoadNingbo 315103China

Halide perovskites with low-dimensionalities(2D or quasi-2D)have demonstrated outstanding stabilities compared to their 3D ***,poor charge-transporting abilities of organic components in 2D perovskites lead to relatively low power conversion efficiency(PCE)and thus limit their applications in ***,we report a novel hole-transporting low-dimensional(HT2D)perovskite,which can form a hole-transporting channel on the top surface of 3D perovskite due to self-assembly effects of metal halide *** HT2D perovskite can significantly reduce interface trap densities and enhance hole-extracting abilities of a heterojunction region between the 3D perovskite and hole-transporting ***,the posttreatment by HT2D can also reduce the crystal defects of perovskite and improve film *** a result,perovskite solar cells(PSCs)can effectively suppress nonradiative recombination,leading to an increasement on photovoltage to>1.20 V and thus achieving>20%power conversion efficiency and>500 h continuous illumination *** work provides a pathway to overcome charge-transporting limitations in low-dimensional perovskites and delivers significant enhancements on performance of PSCs.

关键词： stability perovskite illumination

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Correlation of gut microbiota and neurotransmitters in a rat model of post-traumatic stress disorder

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Journal of Traditional Chinese Medical Sciences 2020年第4期7卷 375-385页

作者： qin Zhou tianshi Sun Fengzhi Wu Feng Li Yan Liu Weihong Li Ning Dai Libo Tan Tenghui Li Yuehan Song School of Traditional Chinese Medicine Beijing University of Chinese MedicineBeijing102488China Periodicals Publishing Center Beijing University of Chinese MedicineBeijing102488China School of Nursing Beijing University of Chinese MedicineBeijing102488China Fangshan Hospital Beijing University of Chinese Medicine Beijing102499China

Objective:To determine the effect of gut microbiota on a rat model of post-traumatic stress disorder(PTSD)and explore the correlation of gut microbiota with behavior and ***:We established a single prolonged stress(SPS)model to examine the pathogenesis of PTSD on rat behavior,gut microbiota,and neurotransmitter *** were separated into control and model groups,and neurotransmitter levels were measured using enzyme linked immunosorbent ***,16 S rRNA sequencing was used to compare the gut microbiota between the control and model ***:Compared with those in the control group,freezing time significantly increased,while number of standing upright,crossing frequency,time spent in the central arena,and total distance traveled were significantly reduced in the model group after exposure to SPS(all P<.05).Meanwhile,serotonin,or 5-hydroxytryptamine,levels in the brain in the model group were significantly lower than those the control group(P紏.0332).In addition,changes were observed in the gut microbiota diversity and relative abundances of bacterial phyla,orders,families,and genera in the model ***,changes in Firmicutes,Bacteroidetes,Cyanobacteria,and Proteobacteria levels were most pronounced after SPS *** analysis showed that the strongest positive correlation was found between Bacteroidaceae and 5-HT(P?.0009).Moreover,RF32 abundance was the most negatively related to 5-HT(P?.0009),crossing frequency(P?.0007),and total distance(P?.0003).Conclusion:Our results suggest that SPS model rats showed differences in behavior,neurotransmitter levels,and gut microbiota with control ***,Firmicutes,Bacteroidetes,Cyanobacteria,and Proteobacteria were most relevant to the exhibited fear-like and anxiety-like behaviors and significant serotonin content reduction in SPS model rats.

关键词： Post-traumatic stress disorder Single prolonged stress Gut microbiota 5-Hydroxytryptamine Behavior

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高光谱遥感技术及其水利应用进展

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地球信息科学学报 2021年第9期23卷 1646-1661页

作者：冯天时庞治国江威覃湘栋付俊娥中国水利水电科学研究院北京100038 水利部防洪抗旱工程技术研究中心北京100038 中国再保险(集团)股份有限公司博士后工作站北京100033

面向新时期水利行业“补短板”和“强监管”的应用需求,遥感的前沿技术高光谱遥感凭借较高的光谱分辨率和图谱合一等优势,在水生态、水环境等水利行业的应用中发挥了重要作用,同时在水灾害、水资源等层面中也存在着一定的应用潜力。本... 详细信息

面向新时期水利行业“补短板”和“强监管”的应用需求,遥感的前沿技术高光谱遥感凭借较高的光谱分辨率和图谱合一等优势,在水生态、水环境等水利行业的应用中发挥了重要作用,同时在水灾害、水资源等层面中也存在着一定的应用潜力。本文介绍了高光谱遥感的成像原理,回顾了成像光谱仪的发展,列举了目前国内外典型的高光谱载荷。重点介绍了高光谱遥感在水利行业的应用进展,包括水华及水生植物监测、水华和水草精确区分、叶绿素浓度反演、悬浮物浓度和泥沙含量定量估算等具体工作。指出高光谱遥感在实时大范围洪涝灾害应急监测、陆表水文参数定量反演等工作存在一定的发展潜力。最后对高光谱遥感在水利行业的应用存在的瓶颈问题进行总结分析并提出展望:多平台高光谱水利要素立体监测与集成技术研发;水利典型地物要素标准波谱数据库构建;水利高光谱遥感信息智能挖掘的理论方法研究。为拓宽高光谱遥感在水利应用中的研究提供参考。

关键词：高光谱遥感水利遥感光谱分辨率水环境水生态水质水灾害遥感反演

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土壤水分微波反演方法进展和发展趋势

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地球信息科学学报 2021年第10期23卷 1728-1742页

作者：覃湘栋庞治国江威冯天时付俊娥中国水利水电科学研究院北京100038 水利部防洪抗旱减灾工程技术研究中心北京100038 中国再保险(集团)股份有限公司博士后工作站北京100033

土壤水分是连接地表水循环和能量循环的关键参量,精确获取该参量对于理解气候变化、地表水文过程、地气间能量交换机理等具有重要意义。微波遥感由于其较为合适的探测深度和坚实的理论基础在观测地表浅层土壤水分上具有很大优势,结合反... 详细信息

土壤水分是连接地表水循环和能量循环的关键参量,精确获取该参量对于理解气候变化、地表水文过程、地气间能量交换机理等具有重要意义。微波遥感由于其较为合适的探测深度和坚实的理论基础在观测地表浅层土壤水分上具有很大优势,结合反演方法可以获取空间连续的土壤水分含量,有助于更加客观认知土壤水分的时空演变机理。随着微波遥感数据的不断丰富,多种微波遥感土壤水分反演方法相继涌现,为了更好地了解其发展和趋势,本文总结了当前土壤水分微波反演常用的卫星遥感数据并分析其发展趋势,后从主动微波反演、被动微波反演和多源协同反演3个方面梳理了各类土壤水分微波反演方法的原理、发展和优缺点,最终总结出目前微波遥感土壤水分反演方法的发展趋势:即土壤水分微波反演方法的时空普适性逐渐增强、面向高时空分辨率的土壤水分微波协同反演方法快速发展以及土壤水分微波反演方法的智能化水平不断提高。

关键词：土壤水分微波遥感遥感数据反演模型辐射传输协同反演降尺度人工智能算法

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从睡虎地秦简看秦朝奴隶与唐代奴婢的异同

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中国经济史研究 2005年第3期 132-140页

作者：李天石南京师大社会发展学院 200097

本文通过对睡虎地秦简与唐律的比较研究,说明唐律中有关奴婢的许多律文、亦即中古良贱身份制度的许多律文,源自于秦律中关于奴隶的规定。这与史书所载唐律源自于魏晋之律,魏晋之律源自于秦汉之律的记载,完全吻合。另一方面,中古社会与... 详细信息

本文通过对睡虎地秦简与唐律的比较研究,说明唐律中有关奴婢的许多律文、亦即中古良贱身份制度的许多律文,源自于秦律中关于奴隶的规定。这与史书所载唐律源自于魏晋之律,魏晋之律源自于秦汉之律的记载,完全吻合。另一方面,中古社会与秦朝社会相比,历史条件毕竟发生了很大变化,其身份等级系统与秦朝相比亦不相同,因而两个时期的奴隶、奴婢制度也有着相当的差异。

关键词：秦朝唐朝奴婢比较睡虎地秦简奴隶异同唐代身份制度历史条件

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高校招生地区配额政策的民众回应和媒体调节

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江苏高教 2020年第1期 38-46页

作者：秦晓蕾 Ross Buchanan 胡天石南京师范大学公共管理学院南京210023 美国德州大学奥斯汀分校政治系南京外国语学校高中部南京210008

高校招生地区配额政策是让民众通过高考实现向上流动时均衡地区资源差异的重要制度,是体现教育公平、缓解各地区教育不均衡发展矛盾、让社会阶层重构的调整平台,具有广泛政治意义和社会意义。研究通过对31个省份数据的实证分析,发现在... 详细信息

高校招生地区配额政策是让民众通过高考实现向上流动时均衡地区资源差异的重要制度,是体现教育公平、缓解各地区教育不均衡发展矛盾、让社会阶层重构的调整平台,具有广泛政治意义和社会意义。研究通过对31个省份数据的实证分析,发现在高校招生地区配额政策问题上,民众意愿对政策变化回应强烈。民众通过百度搜索密切关注高校招生政策变化,通过社交媒体渠道表达他们对政策变化的期望,通过高考移民、送孩子出国读大学等行为规避政策变化带来的影响。在高校招生地区配额政策问题上,学术媒体对高校招生地区配额政策与民众意愿有正向调节作用。学者们通过学术论文讨论政策弊端,呼吁政策改革,在一定程度上推动了高校招生地区配额制度改革进入政府议程。文章最后对深化改革高校招生地区配额政策,促进教育公平的阻力、推动力及路径进行了讨论。

关键词：高校招生配额制度民众意愿政策改革媒体调节

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