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A Non-Halogenated Polymer Donor Based on Imide Unit for Organic Solar Cells with efficiency Nearly 16%

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Chinese Journal of Chemistry 2023年第17期41卷 2095-2102页

作者： Liu Zhang Zhiliang Zhang Haiyan Liang Xia Guo Maojie Zhang Laboratory of Advanced Optoelectronic Materials Suzhou Key Laboratory of Novel Semiconductor-optoelectronics Materials and DevicesCollegeof ChemistryChemical Engineeringand Materials ScienceSoochow UniversitySuzhouJiangsu 215123China National Engineering Research Center for Colloidal Materials School of Chemistry&Chemical EngineeringShandong UniversityJinanShandong 250100China

Comprehensive Summary,Non-halogenated polymers have great potential in the commercialization of organic solar cells(OSCs)due to their advantages in the manufacturing ***,high-performance donor polymers are limited to a small amount of building ***,we utilize as building block 4H-dithieno[3,2-e:2',3'-g]isoindole-4,6(5H)-dione(DTID)to design and synthesize a relevant non-halogenated polymer PBTID for active layers in *** exhibits a strong absorption in the wavelength range of 400—600 nm with a distinctly wide optical bandgap of 2.06 eV,a low-lying highest occupied molecular orbital(HOMO)energy level of−5.53 *** addition,this polymer has a very strong aggregation effect in solution and could form nanoscale fibrils in the neat ***,when blended with the non-fullerene acceptor Y6,the devices achieve a prominent PCE of 15.8%with a high Voc of 0.87 *** Voc and PCE values are one of the highest values in the non-halogenated polymer donor-based OSCs reported to date.

关键词： Dithienophthalimide Non-halogenated polymer donor Building blocks high efficiency Organic solar cells Aggregation

highly efficient conversion of mouse fibroblasts into functional hepatic cells under chemical induction

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Journal of Molecular Cell Biology 2023年第11期15卷 43-57页

作者： Zhi Zhong Jiangchuan Du Xiangjie Zhu Lingting Guan Yanyu Hu Peilin Zhang Hongyang Wang Fudan University Shanghai Cancer Center Department of OncologyShanghai Medical CollegeFudan UniversityShanghai 200032China National Center for Liver Cancer Naval Medical UniversityShanghai 201805China Institute of Metabolism and Integrative Biology Fudan UniversityShanghai 200438China

Previous studies have shown that hepatocyte-like cells can be generated from fibroblasts using either lineage-specific transcription factors or chemical induction ***,these methods have their own deficiencies that restrict the therapeutic applications of such induced *** this study,we present a transgene-free,highly efficient chemical-induced direct reprogramming approach to generate hepatocyte-like cells from mouse embryonic fibroblasts(MEFs).Using a small molecule cocktail(SMC)as an inducer,MEFs can be directly reprogrammed into hepatocyte-like cells,bypassing the intermediate stages of pluripotent and immature *** chemical-induced hepatocyte-like cells(ciHeps)closely resemble mature primary hepatocytes in terms of morphology,biological behavior,gene expression patterns,marker expression levels,and hepatic ***,transplanted ciHeps can integrate into the liver,promote liver regeneration,and improve survival rates in mice with acute liver *** can also ameliorate liver fibrosis caused by chronic injuries and enhance liver ***,ciHeps exhibit no tumorigenic potential either in vitro or in ***,SMC-induced mesenchymal-to-epithelial transition and suppression of SNAI1 contribute to the fate conversion of fibroblasts into *** results indicate that this transgene-free,chemical-induced direct reprogramming technique has the potential to serve as a valuable means of producing alternative hepatocytes for both research and therapeutic ***,this method also sheds light on the direct reprogramming of other cell types under chemical induction.

关键词： direct cell reprogramming chemicals fibroblasts hepatocyte-like cells high efficiency regenerative medicine

Si/SiC Hybrid 5-level Active NPC Inverter for Electric Aircraft Propulsion Drive Applications

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Chinese Journal of Electrical Engineering 2020年第4期6卷 63-76页

作者： Majid T.Fard Mostafa Abarzadeh Kiavash A.Noghani Jiangbiao He Kamal Al-Haddad Department of Electrical and Computer Engineering University of KentuckyLexingtonKY 40506USA Department of Electrical and Computer Engineering Marquette UniversityMilwaukeeWI 53233USA Department of Electrical Engineering Ecole de Technologie Superieure(ÉTS)MontrealH3C 1K3Canada

Medium voltage DC(MVDC)system is considered as a promising technology to improve the efficiency and power density of electric aircraft propulsion(EAP)*** adapt to the MVDC voltage level and achieve high drive performance,a five-level active neutral point clamped(5L-ANPC)inverter consisting of three-level ANPC and flying capacitor circuits is investigated,which possesses higher voltage capability,lower output harmonics,as well as mitigated dv/dt and common-mode *** fulfill the requirements of high-speed operation and pursue further enhanced efficiency and power density of the inverter for the next-generation EAP drives,Silicon Carbide(SiC)semiconductor devices are considered for implementing the 5L-ANPC ***,the large commutation loops associated with certain switching states of the inverter lessen the benefits of configuring all the switches as SiC *** a result,a hybrid Si/SiC 5L-ANPC inverter is developed with a synchronous optimal pulse(SOP)width modulation strategy for controlling the switches in cell 2 and finite-control-set model predictive controller(FCS-MPC)for those in cell 3 of the ***,in the proposed topology,the SiC devices are merely used for the high-frequency switches in cell 3 and the rest of the low-frequency switches are configured with Si *** Si/SiC hybrid ANPC inverter concurrently provides high efficiency and low implementation cost at high-speed operation *** and experimental results are provided to verify the effectiveness of the proposed hybrid inverter.

关键词： Five-level ANPC flying capacitor SOP FCS-MPC carrier-based modulation high efficiency MVDC electric aircraft propulsion

Emerging drug design strategies in anti-influenza drug discovery

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Acta Pharmaceutica Sinica B 2023年第12期13卷 4715-4732页

作者： Chuanfeng Liu Lide Hu Guanyu Dong Ying Zhang Edeildo Ferreira da Silva-Jinior Xinyong Liu Luis Menendez-Arias Peng Zhan Department of Medicinal Chemistry Key Laboratory of Chemical Biology(Ministry of Education)School of Pharmaceutical SciencesShandong UniversityJinan 250012China Laboratory of Medicinal Chemistry Institute of Pharmaceutical SciencesFederal University of AlagoasMaceio 57072-970AlagoasBrazil Centro de Biologia Molecular“Severo Ochoa”(Consejo Superior de Investigaciones Cientificas&Universidad Autonoma de Madrid) Madrid 28049Spain

Influenza is an acute respiratory infection caused by influenza viruses(IFV),According to the World Health Organization(WHO),seasonal IFV epidemics result in approximately 3-5 million cases of severe illness,leading to about half a million deaths worldwide,along with severe economic losses and social ***,frequent mutations in IFV lead to a certain lag in vaccine development as well as resistance to existing antiviral ***,it is of great importance to develop anti-IFV drugs with high efficiency against wild-type and resistant strains,needed in the fight against current and future outbreaks caused by different IFV *** this review,we summarize general strategies used for the discovery and development of antiviral agents targeting multiple IFV strains(including those resistant to available drugs).Structure-based drug design,mechanism-based drug design,multivalent interaction-based drug design and drug repurposing are amongst the most relevant strategies that provide a framework for the development of antiviral drugs targeting IFV.

关键词： Influenza virus Drug design strategies Anti-drugresistance high efficiency Broad spectrum

Recent progress towards fluorinated copolymers for efficient photovoltaic applications

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Chinese Chemical Letters 2016年第8期27卷 1241-1249,1467页

作者： Xiao-Peng Xu Ying Li Mei-Ming Luo Qiang Peng Key Laboratory of Green Chemistry and Technology of Ministry of Education College of Chemistryand State Key Laboratory of Polymer Materials EngineeringSichuan University

This review paper summarizes the recent progress of highly efficient copolymers with the fluorination strategy for photovoltaic *** first present a brief introduction of the fundamental principles of polymer solar cells,and then the functions of fluorine atoms on the polymer donor ***,we review the research progress of the reported copolymers by classification of the fluorinated acceptor units and donor units,*** resulting structure-property correlations of these copolymers are also discussed which shall certainly facilitate widespread utilization of this strategy for constructing high-performance photovoltaic copolymers in the future.

关键词： Polymer solar cells Fluorination Acceptor units Donor units high efficiency

The effect of InAs quantum-dot size and interdot distance on GaInP/GaAs/GaInAs/Ge multi-junction tandem solar cells

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Journal of Semiconductors 2013年第6期34卷 11-15页

作者：屈晓声张思思包鸿音熊丽玲 School of Electronic and Information Engineering Beihang University

A metamorphic GaInP/GaAs/GaInAs/Ge multi-junction solar cell with InAs quantum dots is investigated, and the analytical expression of the energy conversion efficiency on the multi-junction tandem solar cell is derived using the detailed balance principle and the Kronig-Penney *** influences of interdot distance, quantum-dot size and the intermediate band location on the energy conversion efficiency are *** shows that the maximum efficiency,as a function of quantum-dot size and distance,is about 60.15%under the maximum concentration for only one InAs/GaAs subcell,and is even up to 39.69%for the overall *** addition,other efficiency factors such as current mismatch,the formation of a quasicontinuum conduction band and concentrated light are examined.

关键词： multi-junction solar cell Kronig-Penney model quantum dot intermediate band high efficiency

A Fast Vision-inertial Odometer Based on Line Midpoint Descriptor

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International Journal of Automation and computing 2021年第4期18卷 667-679页

作者： Wen-Kuan Li Hao-Yuan Cai Sheng-Lin Zhao Ya-Qian Liu Chun-Xiu Liu State Key Laboratory of Transducer Technology Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100190China

Visual simultaneous localization and mapping(VSLAM) are essential technologies to realize the autonomous movement of vehicles. Visual-inertial odometry(VIO) is often used as the front-end of VSLAM because of its rich information, lightweight, and robustness. This article proposes the FPL-VIO, an optimization-based fast vision-inertial odometer with points and lines. Traditional VIO mostly uses points as landmarks;meanwhile, most of the geometrical structure information is ignored. Therefore, the accuracy will be jeopardized under motion blur and texture-less area. Some researchers improve accuracy by adding lines as landmarks in the ***, almost all of them use line segment detector(LSD) and line band descriptor(LBD) in line processing, which is very time-consuming. This article first proposes a fast line feature description and matching method based on the midpoint and compares the three line detection algorithms of LSD, fast line detector(FLD), and edge drawing lines(EDLines). Then, the measurement model of the line is introduced in detail. Finally, FPL-VIO is proposed by adding the above method to monocular visual-inertial state estimator(VINSMono), an optimization-based fast vision-inertial odometer with lines described by midpoint and points. Compared with VIO using points and lines(PL-VIO), the line processing efficiency of FPL-VIO is increased by 3-4 times while ensuring the same accuracy.

关键词： high efficiency visual-inertial odometry(VIO) non-linear optimization points and lines sliding window

An experimental research on single discharge machining of insulating ceramics efficiently with high energy capacitor

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Science China(Technological Sciences) 2011年第6期54卷 1537-1545页

作者： JI RenJie LIU YongHong ZHANG YanZhen ZHANG HaiFeng LI XiaoPeng DONG Xin College of Electromechanical Engineering China University of Petroleum Dongying 257061 China

Insulating ceramics are applied to modern manufacturing industries for their improved material *** they are the difficult-to-machine materials because of their high rigidity,high brittleness and non-electrical conductivity.A new method which employs a high energy capacitor for electric discharge machining of insulating ceramics efficiently is presented in this paper,and the single discharge experiments have been carried *** process uses the high voltage,large capacitor and high discharge energy,it is able to effectively machine insulating ceramics,and the single discharge crater volume of insulating ceramics can reach 17.63 *** effects of polarity,peak voltage,capacitance,current-limiting resistance,tool electrode feed,tool electrode section area and assisting electrode thickness on the process performance such as the single discharge crater volume,the tool wear ratio and the assisting electrode wear ratio have been *** microstructure of the discharge crater is examined with a scanning electron microscope(SEM).The results show that the discharge craters have sputtering appearance,the insulating ceramic materials are mostly removed by spalling,in the center region of the discharge some materials are removed by melting and vaporization,and the material removal is enhanced with the machining parameters increasing.

关键词： EDM insulating ceramics single pulse high energy high efficiency

Design of a Compact Monopole Antenna for UWB Applications

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Computers, Materials & Continua 2021年第1期66卷 35-44页

作者： Naeem Ahmad Jan Saad Hassan Kiani Daniyal Ali Sehrai Muhammad Rizwan Anjum Amjad Iqbal Mujeeb Abdullah Sunghwan Kim Department of Electrical Engineering Iqra National UniversityPeshawar25000Pakistan Department of Electrical Engineering City University of Science and Information TechnologyPeshawar25000Pakistan Department of Electronic Engineering The Islamia University of BahawalpurBahawalpur63100Pakistan Department of Electrical Engineering Multimedia UniversityCyberjaya63100Malaysia Department of Computer Science Bacha Khan UniversityCharsadda24420Pakistan School of Electrical Engineering University of UlsanUlsan44610Korea

In this paper,a low cost,highly efficient and low profile monopole antenna for ultra-wideband(UWB)applications is presented.A new inverted triangular-shape structure possessing meander lines is designed to achieve a wideband response and high *** design the proposed structure,three steps are utilized to achieve an UWB *** bandwidth of the proposed antenna is improved with changing meander lines parameters,miniaturization of the ground width and optimization of the feeding *** measured and simulated frequency band ranges from 3.2 to 12 GHz,while the radiation patterns are measured at 4,5.3,6 and 8 GHz frequency *** overall volume of the proposed antenna is 26×25×1.6 mm^(3);whereas the FR4 material is used as a substrate with a relative permittivity and loss tangent of 4.3 and 0.025,*** peak gain of 4 dB is achieved with a radiation efficiency of 80 to 98%for the entire *** modelling of proposed antenna is performed in ANSYS HFSS 13 software.A decent consistency between the simulated and measured results is accomplished which shows that the proposed antenna is a potential candidate for the UWB applications.

关键词： Ultra-wideband(UWB) meander lines monopole antenna high efficiency high gain ANSYS HFSS