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D-A structural protean small molecule donor materials for solution-processed organic solar cells

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Chinese Chemical Letters 2017年第11期28卷 2065-2077页

作者： Qiong WU Dan Deng Kun Lu zhi-xiang wei CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China

Under the synergistic effect of molecular design and devices engineering, small molecular organic solar cells have presented an unstoppable tendency for rapid development with putting forward donor- acceptor （D-A） structures. Up to now, the highest power conversion efficiency of small molecules has exceeded 11%, comparable to that of polymers. In this review, we summarize the high performance small molecule donors in various classes of typical donor-acceptor （D-A） structures and discuss their relationships briefly.

关键词： Small molecule donor materials Bulk heterojunction solar cells Donor-acceptor structures Molecule design Power conversion efficiency

A High Energy Density Self-supported and Bendable Organic Electrode for Redox Supercapacitors with a Wide Voltage Window

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Chinese Journal of Polymer Science 2020年第5期38卷 522-530,I0007页

作者： Rashid lqbal Aziz Ahmad Li-Juan Mao Zahid Ali Ghazi Abolhassan Imani Chun-xiang Lu Li-Jing Xie Saad Melhi Fang-Yuan Su Cheng-Meng Chen Lin-Jie zhi zhi-xiang wei Chinese Academy of Sciences(CAS)Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and TechnologyBeijing 100190China CAS Key Laboratory of Carbon Materials Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China University of Chinese Academy of Sciences Beijing 100049China Department of Chemistry College of ScienceUniversity ofBishaBisha 61922Saudi Arabia

Redox-active organic electrode materials are highly desirable in realizing next-generation all-in-one bendable electronic ***,a novel flexible supercapacitors(SCs)electrode is fabricated from poly(anthraquinonyl sulfide)(PAQS)and single-walled carbon nanotubes(SWCNTs)suspension by a simple vacuum filtration and named as *** PAQS-SWCNTs electrode offered an initial capacitance of 223 F·g^-1 and outstanding capacitance retention up to 78.4%after 3×10^4 charge-discharge cycles at 0.5 A·g^-1 current *** a high potential range(0-3 V)and aprotic electrolyte,the PAQS-SWCNTs electrodes in coin cell exhibited an outstanding energy density of 69 Wh·kg^-1 at a power density of 90.6 W·kg^-1,whereas in the fabricated flexible SCs it retained 63.2 Wh·kg^-*** PAQS-SWCNTs electrodes also showed extraordinary performance at a higher current density(20 A·g^-1)and maintained a specific capacitance of 55 and 47 F·g^-1 for coin and flexible SCs,***,the flexible SC is further verified to be able to illuminate up multiple *** futuristic findings showed that the SCs assembled with flexible PAQS-SWCNTs electrodes have potential application in energy-storage devices and make them highly appealing for future redox supercapacitors.

关键词： Redox-active High energy density PAQS SWCNTs Flexible SCs

100 cm^(2) Organic Photovoltaic Cells with 23%Efficiency under Indoor Illumination

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Chinese Journal of Polymer Science 2022年第8期40卷 979-988,I0011页

作者： Yong Cui Hui-Feng Yao Ye Xu Peng-Qing Bi Jian-Qi Zhang Tao Zhang Ling Hong zhi-Hao Chen zhi-xiang wei Xiao-Tao Hao Jian-Hui Hou Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular SciencesCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Beijing100049China CAS key laboratory of nanosystem and hierarchical fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190China School of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJinan250100China

The application of organic photovoltaic(OPV)cells to drive off-grid microelectronic devices under indoor light has attracted broad *** organic semiconductors intrinsically have less ordered intermolecular packing than inorganic materials,the relatively larger energetic disorder is one of the main results that limit the photovoltaic efficiency of the OPV cells at low carrier ***,we optimize the alkyl chains of non-fullerene acceptors to get suppressed energetic *** find the optimal acceptor DTz-R1 with the shortest alkyl chain has the strongest crystalline property and lowest energetic *** a result,over 26%efficiency is recorded for the 1 cm^(2) OPV cells under a light-emitting diode illumination of 500 *** also fabricate a 100 cm^(2) cell device and get a PCE of 23.0%,which is an outstanding value for large-area OPV *** results suggest that modulation of the energetic disorder is of great importance for further improving the efficiency of OPV cells,especially for indoor applications.

关键词： Organic photovoltaic cells Low light intensity Energetic disorder Energy loss Power conversion efficiency

A Simple Building Block with Noncovalently Conformational Locks towards Constructing Low-Cost and High-Performance Nonfused Ring Electron Acceptors

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Chinese Journal of Polymer Science 2023年第4期41卷 556-563,I0008页

作者： Xiao-Bin Gu Jin-Hua Gao Zi-Yang Han Yu-Hao Shi Ya-Nan wei Yin-Cheng Zhang Qian Peng zhi-xiang wei Xin Zhang Hui Huang College of Materials Science and Opto-Electronic Technology Center of Materials Science and Optoelectronics EngineeringCAS Center for Excellence in Topological Quantum ComputationCAS Key Laboratory of Vacuum PhysicsUniversity of Chinese Academy of SciencesBeijing100049China School of Chemical Sciences University of Chinese Academy of SciencesBeijing100049China CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190China

Nonfused ring electron acceptors(NFREAs)have attracted much attention due to their concise synthetic routes and low ***,developing high-performance NFREAs with simple structure remains a great *** this work,a simple building block(POBT)with noncovalently conformational locks(No CLs)was designed and ***-crystal X-ray study indicated the presence of S…O NOCLs in POBT,thus enabling it to possess a coplanar conformation comparable to that of fused-ring *** novel NFREAs based on CPT and POBT were developed,namely TT-CPT and TT-POBT,***,TT-POBT possessed a smaller Stokes shift and a reduced reorganization energy compared with TT-CPT,indicating the introduction of S…O No CLs can enhance the molecular rigidity even if simplifying the molecular *** a result,the TT-POBT-based PSC device afforded an impressive power conversion efficiency of 11.15%,much higher than that of TT-CPT counterpart(7.03%),mainly resulting from the tighterπ-πstacking,improved and balanced charge transport,and more favorable film *** work demonstrates the potential of the simple building block POBT with No CLs towards constructing low-cost and highperformance NFREAs.

关键词： Polymer solar cells Nonfused ring electron acceptors Simple building block Noncovalent conformation locks Reorganization energy

Progress of nanoscience in China

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Frontiers of physics 2014年第3期9卷 257-288页

作者： Yu-Liang Zhao Yan-Lin Song wei-Guo Song wei Liang Xing-Yu Jiang zhi-Yong Tang Hong-Xing Xu zhi-xiang wei Yun-Qi Liu Ming-Hua Liu Lei Jiang Xin-He Bao Li-Jun Wan Chun-Li Bai National Center for Nanoscience and Nanotechnology Beijing 100190 China Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China Institute of Physics Chinese Academy of Sciences Beijing 100190 China Institute of High Energy Physics Chinese Academy of Sciences Beijing 100039 China Institute of Biophysics Chinese Academy of Sciences Beijing 100190 China School of Chemistry and Environment Beijing University of Aeronautics and Astronautics Beijing 100191 China Shenyang Branch Chinese Academy of Seienees Shenyang 110004 China Chinese Academy of Sciences Beijing 100864 China

Fast evolving nanoseienees and nanotechnology in China has made it one of the front countries of nanotechnology development. Ill this review, we summarize some most recent progresses in nanoseienee research and nanotechnology development in China. The topics we selected in this article include llano-fabrication, nanocatalysis, bioinspired nanoteehnology, green printing nanotechnology, nanoplasmonics, nanomedicine, nanomaterials and their applications, energy and environmental nanoteehnology, nano EHS （nanosafety）, etc. Most of them have great potentials in applications or application-related key issues in future.

关键词： nanoscience nanotechnology nanomaterials nanomedicine plasmonics fal)rication catalysis nano EHS (nanosafety)

Theory and application of rock burst prevention using deep hole high pressure hydraulic fracturing

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Journal of Coal Science & Engineering(China) 2013年第2期19卷 136-142页

作者： Shan-Kun ZHAO Jun LIU xiang-zhi wei Chuan-Hong DING Yu-Lei LV Gang-Feng LI China Coal Research Institute Beijing 100013 China State Key Laboratory of Coal Mining and Clean Utilization Beijing 100013 China Yima Coal Group Co. Ltd. Sanmenxia 472300 China

In order to analyze the mechanism of deep hole high pressure hydraulic fracturing, nonlinear dynamic theory, damage mechanics, elastic-plastic mechanics are used, and the law of crack propagation and stress transfer under two deep hole hydraulic fracturing in tectonic stress areas is studied using seepage-stress coupling models with RFPA simulation software. In addition, the effects of rock burst control are tested using multiple methods, either in the stress field or in the energy field. The research findings show that with two deep holes hydraulic fracturing in tectonic stress areas, the direction of the main crack propagation under shear-tensile stress is parallel to the greatest principal stress direction. High-pressure hydraulic fracturing water seepage can result in the destruction of the coal structure, while also weakening the physical and mechanical properties of coal and rock. Therefore the impact of high stress concentration in hazardous areas will level off, which has an effect on rock burst prevention and control in the region.

关键词： rock burst deep hole high pressure hydraulic fracturing seepage-stress coupling models stress concentration factor

Record-breaking bifunctional oxygen electrocatalyst accomplished by a data-driven approach for zinc-air batteries

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Journal of Energy Chemistry 2025年第1期100卷 144-145页

作者： Deviprasath Chinnadurai zhi wei Seh Institute of Materials Research and Engineering (IMRE) Agency for Science Technology and Research (A*STAR)

Rechargeable zinc-air batteries(ZABs) have recently drawn great attention in energy research due to their high theoretical capacity,low costs, and inherently safe nature [1–3]. However, the sluggish cathode reactions necessitate the development of bifunctional oxygen electrocatalysts with lower ΔE indicator values. The ΔE indicator is commonly employed to quantitatively evaluate the electrocatalytic activity of a bifunctional oxygen electrocatalyst,representing the overall overpotential from oxygen reduction reaction(ORR) to oxygen evolution reaction(OER).

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Prospects on mangrove knowledge services in the smart era: From plant atlas to knowledge graphs

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Science China Earth Sciences 2025年第1期68卷 111-127页

作者： zhi-wei HOU Wenlong JING Cheng-zhi QIN Ji YANG Qing XIA Xiaoling YIN Key Laboratory of Guangdong for Utilization of Remote Sensing and Geographical Information System Guangdong Open Laboratory of Geospatial Information Technology and Application Guangzhou Institute of Geography Guangdong Academy of Sciences Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of Sciences College of Resources and Environment University of Chinese Academy of Sciences School of Traffic & Transportation Engineering Changsha University of Science and Technology

Mangroves are crucial to the ecological security of the Earth and human well-being. Their management, conservation, and restoration are of great importance and necessitate the support of spatio-temporal information and multidisciplinary knowledge such as biology and ecology. Traditional knowledge services such as plant atlas provide illustrated textual knowledge of mangroves. However, this kind of service is oriented to information retrieval and is incapable of effectively mining and utilizing fragmented knowledge from multi-source heterogeneous data, facing the problem of “massive data, rare knowledge”. Knowledge graphs are capable of extracting, organizing, and fusing the knowledge contained in massive data into semantic networks that can be understood and computed by computers. They provide a solution for the realization of intelligent knowledge services. Focusing on the urgent need for mangrove knowledge acquisition, formal representation, and intelligent services, this paper proposes a research prospect on mangrove knowledge graphs and knowledge services. We first analyze the similarities and differences between various domain-specific concepts of Tupu. On this basis, we define the mangrove knowledge graph as a large-scale knowledge base that integrates multi-disciplinary knowledge and spatio-temporal information with mangrove ecosystems as the core. Then, we propose a research framework for mangrove knowledge services that can realize the transformation from multi-modal data to intelligent knowledge services, including multiple research levels such as ubiquitous data sensing and aggregation, knowledge organization and graph construction, and intelligent mangrove knowledge services. Subsequently, the methods and workflow for constructing mangrove knowledge graphs are introduced. Finally, we discuss the challenges and possible future directions of mangrove knowledge services in the smart era, including the construction of a mangrove knowledge system that integra

关键词： Mangrove Tupu Knowledge graph Multi-modal Knowledge service

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多通道双混频时差测量系统的实现

计量学报 2009年第6期30卷 -页

作者：张爱敏高小殉宁大愚王伟波苏志强杜向伟冯卫 Ai-min Xiao-xun Da-yu wei-bo zhi-qiang xiang-wei 中国计量科学研究院北京100013 石家庄无线电四厂河北石家庄050011

基于双混频时差技术设计研制了8通道的频率稳定度测量系统,实现了对8路5 MHz或10 MHz频率标准的测量.当频率为10 MHz取样时间为1 s时,系统噪声本底优于2.0 X 10^(-13),取样时间为1000 s时,系统噪声本底优于2.5×10^(-16).不但可以满足... 详细信息

基于双混频时差技术设计研制了8通道的频率稳定度测量系统,实现了对8路5 MHz或10 MHz频率标准的测量.当频率为10 MHz取样时间为1 s时,系统噪声本底优于2.0 X 10^(-13),取样时间为1000 s时,系统噪声本底优于2.5×10^(-16).不但可以满足原子时标基准原子钟组的内部比对,也可实现对一般频率标准的检定和校准.Abstract：Based on the technique of Dual Mixer Time Difference (DMTD), an 8-channel frequency stabilitymeasurement system has been developed. It realized the measurement of 8-channel 5 MHz and 10 MHz frequencystandards. For 10 MHz frequency, the noise floor is better than 2.0 ×10^(-13)/1 s, 2.5× 10^(-16)/1000 s. It can not only satisfy the internal comparison of time scale ensemble, but also can realize the calibration of normal frequency standards.

关键词：多通道混频时差测量系统 Measurement System 系统噪声取样时间频率标准 Time Difference calibration 频率稳定度 time scale comparison 原子时标设计研制本底原子钟 better Mixer Based