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Chinese Journal of Electrical Engineering 2020年第3期6卷 46-55页

作者： xuning zhang Gin Sheh Littelfuse Inc.Round Rock TX 78681USA

An auxiliary power supply(Aux-PS)has become an essential component of electronic equipment for many industrial applications,such as in motor drives,photovoltaic(PV)inverters,uninterruptible power supply(UPS)systems and modular multilevel *** introduction of 1700 V silicon carbide(SiC)metal oxide semiconductor field effect transistors(MOSFETs)is useful for such applications,providing benefits with respect to a low on-state resistance,smaller package,low switching loss and single-switching implementation.A single end flyback Aux-PS is designed for industrial applications with a wide input voltage range using 1.7 kV SiC *** special design tradeoffs involved in the usage of SiC MOSFETs are discussed in detail,such as those with regard to gate driving voltage selection,isolation transformer design considerations,and clamping circuit design details.A 60 W demonstration hardware is developed and tested under different working *** results verify the higher efficiency and better thermal performance of the proposed hardware relative to those of traditional Si solutions.

关键词： Silicon carbide MOSFET wide input range auxiliary power supply

On the Understandings of Dielectric Constant and Its Impacts on the Photovoltaic Efficiency in Organic Solar Cells

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Chinese Journal of Chemistry 2021年第2期39卷 381-390页

作者： Zihao Fu xuning zhang Hong zhang Yanxun Li Huiqiong Zhou Yuan zhang School of Chemistry Beijing Advanced Innovation Center for Biomedical EngineeringBeihang UniversityNo.37 Xueyuan RoadBeijing100191 China Key Laboratory of Nanosystem and Hierachical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190 China

Dielectric constant(ε)is an important parameter affecting the power conversion efficiency of organic solar cells(OSC).Increasingεof bulk heterojunctions in general can benefit the performance of OSCs,as an increasedεwill reduce the influence of Coulomb interaction between weakly bound electron-hole pairs on charge-transfer states or bimolecular recombination involving mobile carriers to reduce geminate and nongeminate *** this review,we overview the current understandings on dielectric constant and its impacts on exciton dissociation and voltage losses in OSCs and summarize recent efforts attempting to modify the dielectric properties of OSC materials through synthetic *** further discuss the commonly adopted techniques for determining the parameter ofεwith stressing the testing conditions that may affect the accuracy of *** last,we suggest that novel experimental methods to improve the dielectric constant and resultant physical processes in OSCs will be appreciated,which helps enrich the existing strategy reservoir toward enhancement of photovoltaic efficiencies.

关键词： Amorphous materials Donor-acceptor systems Energy conversion Nanostructures Photolysis

Bio-inspired manufacturing of superwetting surfaces for fog collection and anti-icing applications

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Science China(Technological Sciences) 2022年第9期65卷 1975-1994页

作者： zhang xuning GAN Lang SUN Bo LIU ZhiYong LIAO GuangLan SHI TieLin State key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China

As a century-old concept,superwettability has aroused the interest of researchers in the past decades,attributed to the discoveries of the mechanisms of special wetting phenomena in ***-inspired manufacturing of superwetting surfaces for fog collection and anti-icing applications has become mainstream research,potentially alleviating the problem of water shortage and ice *** surfaces for fog collection and anti-icing applications involve a reverse process,in which the former gathers water spontaneously,while the latter repels *** analysis of the two is essential for the comprehensive understanding of superhydrophilic/superhydrophobic surfaces and boosting their ***,wetting theories and basic mechanisms for fog collection and anti-icing are briefly ***,manufacturing methods of bionic structures and surfaces are systematically reviewed after discussing the typical organisms with ***,conclusions are drawn and prospects for future development are proposed.

关键词： bionic manufacturing superwettability fog collection anti-icing

Review on flexible perovskite photodetector:processing and

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Frontiers of Mechanical Engineering 2023年第2期18卷 1-31页

作者： xuning zhang Xingyue LIU Yifan HUANG Bo SUN Zhiyong LIU Guanglan LIAO Tielin SHI State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China School of Mechanical Engineering and Electronic Information China University of Geoscience(Wuhan)Wuhan 430074China School of Aerospace Engineering Huazhong University of Science and TechnologyWuhan 430074China Shenzhen Huazhong University of Science and Technology Research Institute Shenzhen 518100China

Next-generation optoelectronics should possess lightweight and flexible characteristics,thus conforming to various types of surfaces or human skins for portable and wearable *** photodetectors as fundamental devices have been receiving increasing attention owing to their potential applications in artificial intelligence,aerospace industry,and wise information technology of 120,among which perovskite is a promising candidate as the light-harvesting material for its outstanding optical and electrical properties,remarkable mechanical flexibility,low-cost and low-temperature processing *** date,most of the reports have demonstrated the fabrication methods of the perovskite materials,materials engineering,applications in solar cells,light-emitting diodes,lasers,and photodetectors,strategies for device performance enhancement,few can be seen with a focus on the processing strategies of perovskite-based flexible photodetectors,which we will give a comprehensive summary,*** begin with,a brief introduction to the fabrication methods of perovskite(solution and vapor-based methods),device configurations(photovoltaic,photoconductor,and phototransistor),and performance parameters of the perovskite-based photodetectors are first ***,processing strategies for photodetectors are presented following,including flexible substrates(i.e.,polymer,carbon cloth,fiber,paper,etc.),soft electrodes(i.e.,metal-based conductive networks,carbon-based conductive materials,and two-dimensional(2D)conductive materials,etc.),conformal encapsulation(single-layer and multilayer stacked encapsulation),low-dimensional perovskites(0D,1D,and 2D nanostructures),and elaborate device *** applications of perovskite-based flexible photodetectors such as optical communication,image sensing,and health monitoring are further exhibited to learn the flexible photodetectors on a deeper *** and future research directions of perovskite-based fl

关键词： photodetector perovskite flexible processing application

Molecular dispersion enhances photovoltaic efficiency and thermal stability in quasi-bilayer organic solar cells

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Science China Chemistry 2021年第1期64卷 116-126页

作者： xuning zhang Yanxun Li Dongyang zhang Guangbao Wu Hong zhang Jiyu Zhou Xing Li Saud-uz-Zafar Jianqi zhang Zhixiang Wei Huiqiong Zhou Yuan zhang School of Chemistry\Beijing Advanced Innovation Center fo r Biomedical Engineering.Beihang University Beijing 100191China CAS Key Laboratory of Nanosvstem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China

In comparison to widely adopted bulk heterojunction(BHJ)structures for organic solar cells(OSC),exploiting the sequential deposition to form planar heterojunction(PHJ)structures enables to realize the favorable vertical phase separation to facilitate charge extraction and reduce charge recombination in ***,effective tunings on the power conversion efficiency(PCE)in PHJ-OSCs are still restrained by the currently available *** on a polymeric donor PBDBT-2 F(PBDBT=Poly[[4,8-bis[5-(2-ethylhexyl)-4-fluoro-2-thienyl]benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl]-2,5-thiophenediyl[5,7-bis(2-ethylhexyl)-4,8-dioxo-4 H,8 H-benzo[1,2-c:4,5-c′]dithiophene-1,3-diyl]-2,5-thiophenediyl])and a non-fullerene(NF)acceptor Y6,we proposed a strategy to improve the properties of photovoltaic performances in PHJ-based OSCs through dilute dispersions of the PBDBT-2 F donor into the acceptor-dominant phase with the sequential film *** the control of donor dispersions,the charge transport balance in the PHJ-OSCs is improved,leading to the expedited photocarrier sweep-out with reduced bimolecular charge *** a result,a PCE of 15.4%is achieved in the ***,the PHJ solar cells with donor dispersions exhibit better thermal stability than corresponding BHJ devices,which is related to the better film morphology robustness and less affected charge sweep-out during the thermal aging.

关键词： diluted donor dispersion sequential film deposition vertical phase separation thermal stability

An emerging terpolymeric nanoparticle pore former as an internal recrystallization inhibitor of celecoxib in controlled release amorphous solid dispersion beads:Experimental studies and molecular dynamics analysis

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Acta Pharmaceutica Sinica B 2024年第6期14卷 2669-2684页

作者： Jamie Anne Lugtu-Pe xuning zhang Sako Mirzaie Hao Han R.Chang Nour AL-Mousawi Kuan Chen Yongqiang Li Anil Kane Daniel Bar-Shalom Xiao Yu Wu Advanced Pharmaceutics and Drug Delivery Laboratory Leslie Dan Faculty of PharmacyUniversity of TorontoToronto M5S 3M2Canada Candoo Pharmatech Company Inc. Mississauga L5N 5M1Canada Department of Pharmacy University of CopenhagenCopenhagen DK-2100Denmark Patheon by Thermo Fisher Scientific Toronto Region Operations(TRO)Mississauga L5N 3X4Canada

Solid oral controlled release formulations feature numerous clinical advantages for drug candidates with adequate solubility and dissolution ***,most new chemical entities exhibit poor water solubility,and hence are exempt from such *** combining drug amorphization with controlled release formulation is promising to elevate drug solubility,like other supersaturating systems,the problem of drug recrystallization has yet to be resolved,particularly within the dosage ***,we explored the potential of an emerging,non-leachable terpolymer nanoparticle(TPN)pore former as an internal recrystallization inhibitor within controlled release amorphous solid dispersion(CRASD)beads comprising a poorly soluble drug(celecoxib)reservoir and insoluble polymer(ethylcellulose)*** to conventional pore former,polyvinylpyrrolidone(PVP),TPN-containing membranes exhibited superior structural integrity,less crystal formation at the CRASD bead surface,and greater extent of celecoxib ***-atom molecular dynamics analyses revealed that in the presence of TPN,intra-molecular bonding,crystal formation tendency,diffusion coefficient,and molecular flexibility of celecoxib were reduced,while intermolecular H-bonding was increased as compared to *** work suggests that selection of a pore former that promotes prolonged molecular separation within a nanoporous controlled release membrane structure may serve as an effective strategy to enhance amorphicity preservation inside CRASD.

关键词： Controlled release amorphous solid dispersion Poorly soluble drug Internal recrystallization Membrane-reservoir coated beads Molecular dynamics simulation Effect of pore formers Terpolymer nanogel Drug-polymer interactions

Organic Passivation of Deep Defects in Cu(In,Ga)Se_(2) Film for Geometry-Simplified Compound Solar Cells

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Research 2023年第4期2023卷 425-435页

作者： Jingwei Chen Xuan Chang Jianxin Guo Qing Gao xuning zhang Chenxu Liu Xueliang Yang Xin Zhou Bingbing Chen Feng Li Jianming Wang Xiaobing Yan Dengyuan Song Han Li Benjamin S.Flavel Shufang Wang Jianhui Chen Advanced Passivation Technology Lab College of Physics Science and TechnologyHebei UniversityBaoding071002China State Key Laboratory of Photovoltaic Materials&Technology Yingli Green Energy Holding Co.Ltd.Baoding 071051China Das Solar Co. Ltd.No 43 Bailing South RoadQuzhou Green Industry Clustering ZoneQuzhouZhejiang Province324022China Institute of Nanotechnology Karlsruhe Institute of TechnologyHermann-von-Helmholtz-Platz 1EggensteinLeopoldshafen76344Germany.

Diverse defects in copper indium gallium diselenide solar cells cause nonradiative recombination losses and impair device ***,an organic passivation scheme for surface and grain boundary defects is reported,which employs an organic passivation agent to infiltrate the copper indium gallium diselenide thin films.A transparent conductive passivating(TCP)film is then developed by incorporating metal nanowires into the organic polymer and used in solar *** TCP films have a transmittance of more than 90%in the visible and nearinfrared spectra and a sheet resistance of~10.5Ω/*** leads to improvements in the open-circuit voltage and the efficiency of the organic passivated solar cells compared with control cells and paves the way for novel approaches to copper indium gallium diselenide defect passivation and possibly other compound solar cells.

关键词： copper visible Defects

Indium-doped perovskite-related cesium copper halide scintillator films for high-performance X-ray imaging

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Photonics Research 2024年第2期12卷 369-376页

作者： RUI LIU ZHIYONG LIU CHENGXU LIN GUANGDA NIU xuning zhang BO SUN TIELIN SHI GUANGLAN LIAO State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China School of Aerospace Engineering Huazhong University of Science and TechnologyWuhan 430074China

Scintillators are widely utilized in high-energy radiation detection in view of their high light yield and short fluorescence decay ***,constrained by their current shortcomings,such as complex fabrication procedures,high temperature,and difficulty in the large scale,it is difficult to meet the increasing demand for costeffective,flexible,and environment-friendly X-ray detection using traditional ***-related cesium copper halide scintillators have recently received multitudinous research due to their tunable emission wavelength,high photoluminescence quantum yield(PLQY),and excellent optical ***,we demonstrated a facile solution-synthesis route for indium-doped all-inorganic cesium copper iodide(Cs_(3)Cu_(2)I_(5))powders and a high scintillation yield flexible film utilizing indium-doped Cs_(3)Cu_(2)I_(5)*** large area flexible films achieved a PLQY as high as 90.2%by appropriately adjusting the indium doping concentration,much higher than the undoped one(73.9%).Moreover,benefiting from low self-absorption and high PLQY,the Cs_(3)Cu_(2)I_(5):In films exhibited ultralow detection limit of 56.2 n Gy/s,high spatial resolution up to 11.3 lp/mm,and marvelous relative light output with strong stability,facilitating that Cs_(3)Cu_(2)I_(5):In films are excellent candidates for X-ray medical *** work provides an effective strategy for developing environment-friendly,low-cost,and efficient scintillator films,showing great potential in the application of highperformance X-ray imaging.

关键词： properties copper halide

Edge Passivation:Considerable Improvement in Photovoltaic Performance of Perovskite/Silicon Tandem Solar Cells

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Edge Passivation:Considerable Improvement in Photovoltaic Pe...

第十一届新型太阳能材料科学与技术学术研讨会

作者： Bingbing Chen Mengnan Cui Xinru Wang Hao Meng Yuhua Bai Wenheng Li Xiao Wang xuning zhang Jianhui Chen Advanced Passivation Technology Lab College of Physics Science and TechnologyHebei University

Edge recombination is considered hard to avoid entirely in silicon（Si） solar cells as well as Si-base solar cells,hindering their future commercialization. However,such an important issue in perovskite/silicon（PK/Si） tandem solar cells have not attracted much ***,a low-temperature,non-vacuum liquid-based edge passivation strategy（LEPS） to improve the power conversion efficiency（PCE） of PK/Si tandem solar cells is proposed. The minority carrier lifetime(τ) of the PK/Si tandem sample with 495.8 μs significantly enhances to 739.7 μs after passivating the Si sub-cell edge *** open circuit voltage(V) of the PK/Si tandem solar cell increases by up to +3.8% abs from the initial state after LEPS treatment due to edge passivation,leading to the PCE of the PK/Si tandem solar cell increases by up to +1.2%***,a monolithic PK/Si tandem cell with a PCE of 29.48% was achieved by further utilizing the LEPS,which opened up a simple and effective avenue for enhancing the PCE of PK/Si tandem solar cells and further promoting a higher photovoltaic output power of tandem modules.

关键词： Passivating edge Perovskite/silicon tandem solar cells lateral surface

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元宇宙国潮文化的虚拟数字人设计与应用研究

鞋类工艺与设计 2024年第22期4卷 174-178页

作者：张栩宁河北大学中央兰开夏传媒与创意学院河北保定071002

元宇宙发展热潮为当下传播创造了新的空间和发展可能性,虚拟数字人作为实现元宇宙建设基础的构成要素对我国文化传播与国际竞争有着重要作用。本文通过对现有虚拟数字人产业调研分析,以及从动画人物形象发展为源头,引出现今国内虚拟数... 详细信息

元宇宙发展热潮为当下传播创造了新的空间和发展可能性,虚拟数字人作为实现元宇宙建设基础的构成要素对我国文化传播与国际竞争有着重要作用。本文通过对现有虚拟数字人产业调研分析,以及从动画人物形象发展为源头,引出现今国内虚拟数字人所面临的问题;其次以国潮文化的兴起为切入点,介绍发展国潮虚拟数字人在元宇宙背景下的重要性。从中国历史元素与现有优秀国潮虚拟数字人为案例,对国潮虚拟数字人构成要素进行美学思考;最后引申国潮虚拟数字人在新媒体时代下的应用场景以及应用价值,为后续国内虚拟数字人发展、实践应用引发思考和提供借鉴。

关键词：国潮数字人元宇宙虚拟美学