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CsPb(I_(x)Br_(1-x))_(3) solar cells

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Science Bulletin 2019年第20期64卷 1532-1539页

作者： Xue Jia Chuantian Zuo Shuxia Tao Kuan Sun Yixin Zhao Shangfeng yang Ming cheng Mingkui Wang Yongbo Yuan Junliang yang Feng Gao Guichuan Xing Zhanhua wei Lijun Zhang Hin-Lap Yip Mingzhen Liu Qing Shen Longwei Yin Liyuan Han Shengzhong Liu Lianzhou Wang Jingshan Luo Hairen Tan Zhiwen Jin Liming Ding Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing100190China University of Chinese Academy of Sciences Beijing100049China CSIRO Manufacturing Bag10Clayton SouthVictoria3169Australia Center for Computational Energy Research Department of Applied PhysicsEindhoven University of Technology5600MB EindhovenThe Netherlands MOE Key Laboratory of Low-grade Energy Utilization Technologies and Systems Chongqing UniversityChongqing400044China School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai200240China Department of Materials Science and Engineering University of Science and Technology of ChinaHefei230026China Institute for Energy Research Jiangsu UniversityZhenjiang212013China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan430074China School of Physics and Electronics Central South UniversityChangsha410083China Department of Physics Chemistry and BiologyLinkoping UniversitySE-58183 LinkopingSweden Institute of Applied Physics and Materials Engineering University of MacaoMacao999078China College of Materials Science&Engineering Huaqiao UniversityXiamen361021China College of Materials Science and Engineering Jilin UniversityChangchun130012China State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou510640China Center for Applied Chemistry School of Materials and EnergyUniversity of Electronic Science and Technology of ChinaChengdu611731China Faculty of Informatics and Engineering The University of Electro-CommunicationsTokyo182-8585Japan School of Materials Science and Engineering Shandong UniversityJinan250061China State Key Laboratory of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai200240China Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Normal UniversityXi’an710119China

Owing to its nice performance, low cost, and simple solution-processing, organic-inorganic hybrid perovskite solar cell(PSC) becomes a promising candidate for next-generation high-efficiency solar *** power conversion efficiency(PCE) has boosted from 3.8% to 25.2% over the past ten years. Despite the rapid progress in PCE, the device stability is a key issue that impedes the commercialization of PSCs. Recently, all-inorganic cesium lead halide perovskites have attracted much attention due to their better stability compared with their organic-inorganic counterpart. In this progress report, we summarize the properties of CsPb(IxBr1-x)3 and their applications in solar cells. The current challenges and corresponding solutions are discussed. Finally, we share our perspectives on CsPb(IxBr1-x)3 solar cells and outline possible directions to further improve the device performance.

关键词： Perovskite solar cells Cesium lead halide perovskites Power conversion efficiency Stability

Two-carrier transport in SrMnBi2 thin films

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Frontiers of physics 2017年第3期12卷 61-72页

作者： Xiao Yan cheng Zhang Shan-Shan Liu Yan-Wen Liu David wei Zhang Fa-Xian Xiu Peng Zhou State Key Laboratory of ASIC and System School of Microelectronics Fudan University Shanghai 200433 China State Key Laboratory of Surface Physics and Department of Physics Fudan University Shanghai 200433 China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093 China

Monocrystalline SrMnBi2 thin films were grown by molecular beam epitaxy （MBE）, and their transport properties were investigated. A high and unsaturated linear magnetoresistance （MR） was observed, which exhibited a transition from a semi-classical weak-field B2 dependence to a high-field linear dependence. An unusual nonlinear Hall resistance was also observed because of the anisotropic Dirac fermions. The two-carrier model was adopted to analyze the unusual Hall resistance quantitatively. The fitting results yielded carrier densities and mobilities of 3.75×10^14 cm^-2 and 850 cm^2·V^-1·s^-1, respectively, for holes, and 1.468×10^13 cm^-2, 4118 cm^2·V^-1·s^-1, respectively, for electrons, with a hole-dominant conduction at 2.5 K. Hence, an effective mobility can be achieved, which is in reasonable agreement with the effective hole mobility of 1800 cm^2·V^-1·s^-1, extracted from the MR. Further, the angle-dependent MR, proportional to cos 0, where 0 is the angle between the external magnetic field and the perpendicular orientation of the sample plane, also implies a high anisotropy of the Fermi surface. Our results about SrMnBi2 thin films, as one of a new class of AEMnBi2 and AEMnSb2 （AE = Ca, Sr, Ba, Yb, Eu） materials, suggest that they have a lot of exotic transport properties to be investigated, and that their high mobility might facilitate electronic device applications.

关键词： SrMnBi2 thin films magnetoresistance two carriers anisotropic Dirac fermions

1990~2019年中国和全球归因于Ω-3多不饱和脂肪酸摄入不足的缺血性心脏病疾病负担分析

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中国循证心血管医学杂志 2024年第6期16卷 681-685页

作者：郑资辉魏成徐瑶张记收王梦龙武汉大学人民医院心内科武汉430060 武汉大学心血管病研究所武汉430060 心血管病湖北省重点实验室武汉430060

目的分析1990~2019年中国和全球居民归因于Ω-3多不饱和脂肪酸(Ω3-PUFA)摄入不足的缺血性心脏病(IHD)疾病负担及变化情况。方法利用2019年全球疾病负担数据,选取年龄标化死亡率、标化伤残调整寿命年(DALY)率和平均年度百分比变化率(AA... 详细信息

目的分析1990~2019年中国和全球居民归因于Ω-3多不饱和脂肪酸(Ω3-PUFA)摄入不足的缺血性心脏病(IHD)疾病负担及变化情况。方法利用2019年全球疾病负担数据,选取年龄标化死亡率、标化伤残调整寿命年(DALY)率和平均年度百分比变化率(AAPC)等指标,对1990~2019年中国和全球居民归因疾病负担状况及变化趋势进行分析。结果2019年中国居民归因于Ω3-PUFA摄入不足的IHD标化死亡率为4.32/10万,标化DALY率为75.93/10万;而全球归因标化死亡率和DALY率分别为4.32/10万和90.65/10万。与1990年相比,2019年中国归因于Ω3-PUFA摄入不足的IHD标化死亡率升高12.88%,DALY率降低3.58%;而全球归因标化死亡率和DALYs率均较1990年下降,分别降低31.10%和28.74%。2019年中国归因标化死亡率和DALY率均表现为男性高于女性(5.77/10万vs.3.36/10万、102.10/10万vs.53.52/10万),且均随年龄增长而升高。1990~2019年,中国归因疾病负担整体呈先上升后下降趋势,归因标化死亡率AAPC为0.4%(95%CI:0.2%~0.6%,P<0.05),而DALY率AAPC为-0.1%(95%CI:-0.3%~0%,P<0.05)。结论在全球Ω3-PUFA摄入不足所致IHD疾病负担明显下降的背景下,中国在控制相关疾病负担方面仍有不足。适当补充Ω3-PUFA可能改善IHD疾病负担。

关键词： Ω-3多不饱和脂肪酸死亡率伤残调整寿命年疾病负担疾病预防

Combined DFT and experiment:Stabilizing the electrochemical interfaces via boron Lewis acids

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Journal of Energy Chemistry 2021年第8期30卷 100-107,I0004页

作者： Zhe-Fan Wang Zonglin Yi Aziz Ahmad Lijing Xie Jing-Peng Chen Qingqiang Kong Fangyuan Su Da-wei Wang cheng-Meng Chen CAS Key Laboratory of Carbon Materials Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences100049 BeijingChina University of Chinese Academy of Sciences 100049 BeijingChina School of Chemical Engineering The University of New South WalesSydney 2052Australia

The incorporation of boron into carbon material can significantly enhance its capacity ***,the origin of the promotion effect of boron doping on electrochemical performances is still unclear,in part due to the inadequate exposure of boron configurations resulting from the complexity of traditional carbon *** overcome this issue,herein,a series of boron-doped graphene with highly-exposed boron configurations are prepared by tuning annealing *** the correlation between boron configurations and the electrochemical performances is *** combination of density-functional theory(DFT)computation and NH3-TPD/Py-FTIR indicates that the BCO_(2)configuration formed on the surface of graphene is easier to accept lone-pair electrons than BC_(2)O and BC_(3)configurations due to the stronger Lewis *** an electronic structure can effectively reduce the number of unstable electron donors and stabilize the electrochemical interface,which is proved by NMR,and critical for improving the electrochemical *** experiments confirm that the optimized BG800 with the largest amount of BCO_(2)configuration presents ultralow leak current,improved cyclic stability,and better rate performance in SBPBF4/*** work would provide an insight into the design of high-performance boron-doped carbon materials towards energy storage.

关键词： Boron doped graphene Lewis acid Electrochemical interfaces DFT

Reductive kinetics of Panzhihua ilmenite with hydrogen

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Transactions of Nonferrous Metals Society of China 2016年第12期26卷 3266-3273页

作者： Chang-yuan LU Xing-li ZOU Xiong-gang LU Xue-liang XIE Kai ZHENG wei XIAO Hong-wei cheng Guang-shi LI School of Materials Science and Engineering Shanghai University Shanghai 200072 China State Key Laboratory of Advanced Special Steel Shanghai University Shanghai 200072 China Shanghai Key Laboratory of Advanced Ferrometallurgy Shanghai University Shanghai 200072 China Shanghai Shanshan Tech. Co. Ltd. Shanghai 201209 China

The hydrogen reduction of Panzhihua ilmenite concentrate in the temperature range of 900?1050 °C was systematicallyinvestigated by thermogravimetric analysis (TG), X-ray diffraction (XRD) and scanning electron microscopy (SEM) methods. It wasshown that the products of the Panzhihua ilmenite reduced at 900 °C were metallic iron and rutile. Above 1000 °C, ferrouspseudobrookite solid solution was generated. During the reduction process, element Mg gradually concentrated to form Mg-rich zonewhich can influence the metallization process. The reduction reaction proceeded topochemically and its related reduction kineticswere also discussed. The kinetics of the reduction indicated that the rate-controlling step was the diffusion process. The apparentactivation energy of the hydrogen reduction of Panzhihua ilmenite was calculated to be 117.56 kJ/mol, which was larger than that ofsynthetic ilmenite under the same reduction condition.

关键词： Panzhihua ilmenite synthetic ilmenite hydrogen reduction kinetics rate-controlling step magnesium migration

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研究生学术创新影响因素及提升策略研究

创新创业理论研究与实践 2024年第5期7卷 10-12,57页

作者：卢凡静韦诚罗明凯陆增辉陈艳宁右江民族医学院广西百色533000

该文探讨了研究生学术创新能力的影响因素及提升策略,以培养更为专业、高端、实用型创新人才为目标,从个人、科研环境、课程与教学3个维度分析,构建“三阶段阶梯式”培养模式,从个人能力提升、改善科研环境、教学改革创新入手,贯穿研究... 详细信息

该文探讨了研究生学术创新能力的影响因素及提升策略,以培养更为专业、高端、实用型创新人才为目标,从个人、科研环境、课程与教学3个维度分析,构建“三阶段阶梯式”培养模式,从个人能力提升、改善科研环境、教学改革创新入手,贯穿研究生学术规划全过程,推进研究生学术创新,为更好地实现高校研究生人才培养目标提供策略研究。

关键词：硕士研究生学术创新能力研究效能创新思维教学方法人才培养

多层螺旋CT轴位与两种图像后处理技术在肋骨骨折诊断的准确性分析

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罕少疾病杂志 2024年第9期31卷 111-112页

作者：谢宇飞赵宏伟刘志春徐来成联勤保障部队第990医院医学影像科河南驻马店463000

目的分析层螺旋CT轴位与两种图像后处理技术在肋骨骨折诊断的准确性。方法收集2020年8月至2021年8月期间我院入住且符合本研究纳入标准的肋骨骨折患者80例,以随机数表法将患者进行分组,组别设为对照组(40例)、观察组(40例),对照组使... 详细信息

目的分析层螺旋CT轴位与两种图像后处理技术在肋骨骨折诊断的准确性。方法收集2020年8月至2021年8月期间我院入住且符合本研究纳入标准的肋骨骨折患者80例,以随机数表法将患者进行分组,组别设为对照组(40例)、观察组(40例),对照组使用多层螺旋CT轴位检查,观察组在多层螺旋CT轴位检查的基础上加入图像后处理技术,对比两组检验准确率以及检验各项指标。结果以手术病理诊断作为金标准,观察组检验准确率100.00%显著高于对照组90.00%,P0.05;观察组合并其他损伤检出率为87.50%,较对照组检出率55.56%得到显著提升,P0.05。观察组诊断图像处理时间、诊断费用高于对照组,P<0.05。结论肋骨骨折诊断的过程中使用多层螺旋CT轴位检查具有较高的检验准确率,可以对骨折类型进行判断,但是对于隐匿性骨折检验的准确率不足,因此加入两种图像后处理技术,通过VR、SSD三维重建,对图像进行更加科学的处理,提升诊断质量,值得临床推广普及。

关键词：多层螺旋CT 轴位扫描图像后处理技术肋骨骨折准确性

蓝莓黑尖现象的影响因素及在栽培技术中的应用

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北方果树 2024年第3期 27-29,33页

作者：王兴东魏鑫徐艺格郭丹刘成田帅辽宁省果树科学研究所辽宁熊岳115009 绥中县农业综合行政执法队辽宁绥中125200

蓝莓是杜鹃花科越橘属植物,作者从事蓝莓栽培技术研究时发现,黑尖是蓝莓新梢生长发育过程中特有的生理现象,在生产栽培中非常重要。该文阐述了蓝莓黑尖特性、影响因素及在生产栽培技术中的应用。

关键词：蓝莓黑尖特性影响因素栽培应用

Broadband angular momentum cascade via a multifocal graphene vortex generator

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Chinese Optics Letters 2022年第10期20卷 91-95页

作者： Zhongwei Jin Guiyuan Cao Hongtao Wang Han Lin Baohua Jia cheng-wei Qiu College of Optical and Electronic Technology China Jiliang UniversityHangzhou 310018China Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore Centre of Translational Atomaterials(CTAM) Faculty of ScienceEngineering and TechnologySwinburne University of TechnologyHawthornVIC 3122Australia School of Science RMIT UniversityMelbourneVIC 3000Australia The Australian Research Council(ARC)Industrial Transformation Training Centre in Surface Engineering for Advanced Materials(SEAM) Swinburne University of TechnologyHawthornVIC 3122Australia

Light beams carrying orbital angular momentum(OAM)have inspired various advanced applications,and such abundant practical applications in turn demand complex generation and manipulation of optical ***,we propose a multifocal graphene vortex generator,which can produce broadband angular momentum cascade containing continuous integer non-diffracting vortex *** device naturally embodies a continuous spiral slit vortex generator and a zone plate,which enables the generation of high-quality continuous vortex modes with deep depths of ***,the generated vortex modes can be simultaneously tuned through incident wavelength and position of the focal *** elegant structure of the device largely improves the design efficiency and can be fabricated by laser nanofabrication in a single ***,the outstanding property of graphene may enable new possibilities in enormous practical applications,even in some harsh environments,such as aerospace.

关键词： optical vortex multifocus broadband wavelength tunability graphene