检索结果-南通市图书馆

Efficient and 1,8-diiodooctane-free ternary organic solar cells fabricated via nanoscale morphology tuning using small-molecule dye additive

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2017年第11期10卷 3765-3774页

作者： Shuhua zhang Muhammad Naeem Shah Feng Liu zhongqiang zhang Qin Hu Thomas P. Russell Minmin Shi Chang-Zhi Li Hongzheng Chen MOE Key Laboratory of Macromolecular Synthesis and Functionalization State Key Laboratory of Silicon Materials Department of Polymer Science amp Engineering Zhejiang University Hangzhou 310027 China Department of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240 China Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA

The ternary strategy for incorporating multiple photon-sensitive components into a single junction has emerged as an effective method for optimizing the nanoscale morphology and improving the device performance of organic solar cells （OSCs）.In this study,efficient and stable ternary OSCs were achieved by introducing the small-molecule dye （5E,5＆#39;E）-5,5＆#39;-（4＆#39;,4″-（1,2-diphenylethene-1,2-diyl）bis（biphenyl-4＆#39;,4-diyl））bis（methan-1-yl-1-ylidene）bis（3-ethyl-2-thioxothia zolidin-4-one）（BTPERn） into poly[4,8-bis（5-（2-ethylhexyl）thiophen-2-yl）benzo[1,2-b：4,5-b＆#39;]dithiopheneco-3-fluorothieno[3,4-b]thiophene-2-carboxylate] （PTB7-Th）：[6,6]-phenyl C71 butyric acid methyl ester （PC71BM） blend films processed using a 1,8-diiodooctane （DIO）-free *** incorporation of BTPE-Rn enhanced the short-circuit current density and fill factor of the ternary OSCs compared with those of binary *** investigation of the optical,electronic,and morphological properties of the ternary blends indicated that the third component of BTPE-Rn not only promoted the photon utilization of blends through the energy-transfer process but also improved the electron mobility of the blends owing to the fullerene-rich nanophase *** importantly,this ternary strategy of utilizing a small-molecule dye to replace the photounstable DIO additive enhanced the operational stability of the OSCs.

关键词： ternary organic solar cell energy transfer mobility 1 8-diiodooctane (DIO)-free

Donor-acceptor(D-A)terpolymers based on alkyl-DPP and t-BocDPP moieties for polymer solar cells

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2017年第12期28卷 2223-2226页

作者： Fateh Ullah Sun Qian Weitao Yang Muhammad Naeem Shah zhongqiang zhang Hongzheng Chen Chang-Zhi Li MOE Key Laboratory of Macromolecular Synthesis and Functionalization State Key Laboratory of Silicon MaterialsDepartment of Polymer Science andEngineeringZhejiang UniversityHangzhou 310027China

A series of low band gap terpolymers based on 4,8-bis（5-（2-ethylhexyl）thiophen-2-yl）benzo[l,2-b：4,5- b＇]dithiophene （BDTr） and diketopyrrolopyrrole （DPP） with varied solubilizing groups （i.e., tert- butoxycarbonyl, t-Boc and 2-octyldodecyl） are developed as electron donors for bulk heterojunction （BHJ） polymer solar cells （PSCs）. The results reveal that the one with 50% t-Boc concentration （P3） performs better than the other terpolymers used in this study in conventional PSC devices with a power conversion efficiency of 2.92%.

关键词： Conjugated polymerOrganic semiconductorPolymer solar cellsBulk heterojunctionDiketopyrrolopyrrole

Application of Fractal Theory in Brick-Concrete Structural Health Monitoring

在线全文

学校读者我要写书评

暂无评论

Engineering（科研） 2016年第9期8卷 646-656页

作者： Changmin Yang Xia Zhao Yanfang Yao zhongqiang zhang Architectural Engineering Institute Hebei University Baoding China Hebei College of Science and Technology Baoding China

In order to monitor and forecast the deformation of the brick-concrete building, by taking a brick-concrete building as research object, fiber grating sensors were used to collect the monitoring data and double logarithmic curve of limit value characteristic and monitoring data were obtained based on the fractal theory. Constant dimension fractal method cannot be used to analyze the data directly. With the method of variable dimension fractal, we accumulate data, and the double logarithmic curve is smooth. Piecewise fractal dimensions are close. The outer interpolation method is used to calculate the fractal dimension of the next point and then back calculate the vertical displacement. The relative errors are calculated by comparing the forecast values and monitoring values, and the maximum relative error is 5.76%. The result shows that the fractal theory is suitable to use in the forecast of the deformation and the accuracy is good.

关键词： Brick-Concrete Building Real-Time Monitoring Fiber Grating Sensors Constant Di-mension Fractal Variable Dimension Fractal Log-Log Line Prediction

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

线性离子源反应离子刻蚀多晶硅绒面结构

化学工程 2023年第9期51卷 7-13页

作者：孙涛张忠强林本才上官泉元江苏大学机械工程学院江苏镇江212000 常州大学材料科学与工程学院江苏常州213000 常州比太科技有限公司江苏常州213000

为探究硅片绒面结构受RIE(反应离子刻蚀)工艺参数的影响规律,采用二维流体力学漂移扩散有限元方法建立了矩形腔室电容耦合等离子体放电模型,研究射频功率和压强对等离子放电特性的影响规律,并通过实验研究不同功率(1500、1750、1900 W)... 详细信息

为探究硅片绒面结构受RIE(反应离子刻蚀)工艺参数的影响规律,采用二维流体力学漂移扩散有限元方法建立了矩形腔室电容耦合等离子体放电模型,研究射频功率和压强对等离子放电特性的影响规律,并通过实验研究不同功率(1500、1750、1900 W)和压强(22—30 Pa)工艺参数下,多晶硅片经刻蚀后其表面纳米结构特征。结果表明:通过采用Cl_(2)、O_(2)和SF_(6)作为反应气体刻蚀形成的纳米绒面结构宽度在196—480 nm、深度在120—280 nm。射频功率的增加使得中性活性物质数密度增加,刻蚀宽度随之增加,离子数密度以及电场强度增强使得刻蚀深度增加,刻蚀速率得到提高;压强的增加只增加刻蚀宽度,对刻蚀深度几乎无影响。该方法和结论可为RIE工艺参数控制和绒面结构调控提供参考。

关键词：反应离子刻蚀线性离子源多晶硅电容耦合放电绒面结构

钢铁厂余热电站发电机中性点接地方式的选择及计算

在线全文

学校读者我要写书评

暂无评论

自动化与仪器仪表 2022年第7期 321-324页

作者：张忠强重庆赛迪热工环保工程技术有限公司重庆401122

河南某钢厂炼焦余热电站发电机与钢厂配电网并网运行,余热电站发电机中性点接地方式要与全厂配电网匹配,满足接地电流允许值要求。依据国内发电机接地故障电流允许值要求,介绍了几种不同发电机中性点接地方式的选择及其适用原则,并进行... 详细信息

河南某钢厂炼焦余热电站发电机与钢厂配电网并网运行,余热电站发电机中性点接地方式要与全厂配电网匹配,满足接地电流允许值要求。依据国内发电机接地故障电流允许值要求,介绍了几种不同发电机中性点接地方式的选择及其适用原则,并进行了分析、计算。通过算例阐述了该余热电站发电机中性点接地方式的选择和计算方法。

关键词：余热电站发电机中性点接地方式高电阻

石墨烯纳米通道中富勒烯纳米流体的压力驱动流动特性

在线全文

学校读者我要写书评

暂无评论

化工学报 2018年第5期69卷 1892-1899页

作者：刘珍张忠强江苏科技大学船舶与海洋工程学院江苏镇江212003 江苏大学微纳米科学技术研究中心江苏镇江212013 大连理工大学工业装备结构分析国家重点实验室辽宁大连116024

采用分子动力学方法探索了水-富勒烯纳米流体在石墨烯纳米孔隙中Poiseuille流动特性。从富勒烯的微观运动及团簇行为的角度出发,考虑了驱动作用力、富勒烯体积分数和电场强度对纳米流体流动特性的影响机理。发现较大的压力驱动作用可以... 详细信息

采用分子动力学方法探索了水-富勒烯纳米流体在石墨烯纳米孔隙中Poiseuille流动特性。从富勒烯的微观运动及团簇行为的角度出发,考虑了驱动作用力、富勒烯体积分数和电场强度对纳米流体流动特性的影响机理。发现较大的压力驱动作用可以弱化纳米流体中富勒烯分子的团簇效应;富勒烯体积分数的增加会提高纳米流体剪切黏性,并促进富勒烯分子发生团簇,还会导致纳米流体边界滑移速度的增加;石墨烯壁面上的电场强度的增大,会使富勒烯纳米流体的边界滑移速度先减小后增大,阐明了电场强度对纳米流体边界滑移的影响是石墨烯-流体界面作用强度变化、疏水单分子层的形成和富勒烯团簇的运动行为三者协同作用的结果。

关键词：石墨烯纳米粒子纳米流体团聚计算机模拟

在线全文

学校读者我要写书评

暂无评论

选煤厂生产系统提质增效工艺

洁净煤技术 2023年第S2期29卷 696-701页

作者：王宇辉关海涛张忠强国家能源集团神东煤炭集团有限责任公司陕西榆林719315

选煤厂生产系统主要生产工艺为200~13 mm块煤重介浅槽分选,<13 mm末煤不分选。13~6 mm原煤占比高,灰分较低,不分选与末精煤直接作为电煤使用。此工艺存在资源浪费、入选率较低及产品品种单一等问题,极大降低了企业经济效益。本次改造通... 详细信息

选煤厂生产系统主要生产工艺为200~13 mm块煤重介浅槽分选,<13 mm末煤不分选。13~6 mm原煤占比高,灰分较低,不分选与末精煤直接作为电煤使用。此工艺存在资源浪费、入选率较低及产品品种单一等问题,极大降低了企业经济效益。本次改造通过煤质分析和技术经济对比,提出工艺改造方案:矿井来煤经6 mm分级筛筛分,筛上物进入重介浅槽分选机,筛下粉煤不分选,粗煤泥由煤泥离心机回收,细煤泥采用加压过滤机回收。主要产品为200~25 mm块精煤、<25 mm末精煤及弛张筛下<6 mm、粗煤泥和细煤泥混合后的混煤产品。本次改造通过降低浅槽分选机入选下限,提高了原煤入选率,稳定了产品质量;通过新增末精煤产品,直接提高了企业的经济效益,达到提质增效的目的。

关键词：提质增效弛张筛重介浅槽分选机入选率

N-doped graphene quantum dot-decorated N-TiO2/P-doped porous hollow g-C_(3)N_(4) nanotube composite photocatalysts for antibiotic photodegradation and H2 production

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2024年第1期31卷 165-178页

作者： Jingshu Yuan Yao zhang Xiaoyan zhang Junjie zhang Shen’gen zhang Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China Xi’an Fanyi University Xi’an 710105China Shunde Graduate School of University of Science and Technology Beijing Foshan 528399China State Key Laboratory of Lunar and Planetary Sciences Macao University of Science and TechnologyMacao SAR 820000China

Exclusive responsiveness to ultraviolet light (~3.2 eV) and high photogenerated charge recombination rate are the two primary drawbacks of pure TiO_(2). We combined N-doped graphene quantum dots (N-GQDs), morphology regulation, and heterojunction construction strategies to synthesize N-GQD/N-doped TiO_(2)/P-doped porous hollow g-C_(3)N_(4) nanotube (PCN) composite photocatalysts (denoted as G-TPCN). The optimal sample (G-TPCN doped with 0.1wt% N-GQD, denoted as 0.1% G-TPCN) exhibits significantly enhanced photoabsorption, which is attributed to the change in bandgap caused by elemental doping (P and N), the improved light-harvesting resulting from the tube structure, and the upconversion effect of N-GQDs. In addition, the internal charge separation and transfer capability of0.1% G-TPCN are dramatically boosted, and its carrier concentration is 3.7, 2.3, and 1.9 times that of N-TiO_(2), PCN, and N-TiO_(2)/PCN(TPCN-1), respectively. This phenomenon is attributed to the formation of Z-scheme heterojunction between N-TiO_(2) and PCNs, the excellent electron conduction ability of N-GQDs, and the short transfer distance caused by the porous nanotube structure. Compared with those of N-TiO_(2), PCNs, and TPCN-1, the H2 production activity of 0.1%G-TPCN under visible light is enhanced by 12.4, 2.3, and 1.4times, respectively, and its ciprofloxacin (CIP) degradation rate is increased by 7.9, 5.7, and 2.9 times, respectively. The optimized performance benefits from excellent photoresponsiveness and improved carrier separation and migration efficiencies. Finally, the photocatalytic mechanism of 0.1% G-TPCN and five possible degradation pathways of CIP are proposed. This study clarifies the mechanism of multiple modification strategies to synergistically improve the photocatalytic performance of 0.1% G-TPCN and provides a potential strategy for rationally designing novel photocatalysts for environmental remediation and solar energy conversion.

关键词： N-doped TiO_(2) N-doped graphene quantum dots P-doped g-C_(3)N_(4) porous hollow nanotube heterojunction photocatalysis

Reversing free-electron transfer of sulfide cocatalyst for exceptional photocatalytic H_(2)evolution

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2024年第4期171卷 147-149页

作者： Yanfeng zhang Zhenyi zhang National Experimental Chemistry Teaching Center Hebei Key Laboratory of Inorganic Nano-materialsCollege of Chemistry and Materials ScienceHebei Normal UniversityShijiazhuang 050024China Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission Key Laboratory of Photosensitive Materials and Devices of Liaoning ProvinceSchool of Physics and Materials EngineeringDalian Minzu UniversityDalian 116600China

Recently,Yu and co-workers deeply explore the potential impact of free electron transfer between co-catalysts and photocatalyst carriers on H_(2)evolution efficiency of active sites over MoS_(2+x).They pro-pose an electron-reversal tactics to evade the unexpected electron transfer and synchronously regulate the above transfer in a beneficial orientation for weakening hydrogen adsorption on S ***,this highlight not only discusses and summarizes the essences of electron reversal and the optimized H ad-sorption/desorption mechanism,but also emphasizes the significance of femtosecond transient absorp-tion spectroscopy(fs-TAS)and in-situ irradiated X-ray photoelectron spectroscopy(ISI-XPS)for revealing charge transfer dynamics and *** anticipate that this highlight can disseminate a new per-spective on the roles of photocatalyst carriers in improving cocatalytic H_(2)-production kinetics.

关键词： Photocatalysis Cocatalyst Electron reversal Antibonding-orbital occupancy S–H bonds