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crystallization Modulation and Holistic Passivation Enables Efficient Two‑Terminal Perovskite/cuIn(Ga)Se_(2)Tandem Solar cells

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Nano-Micro Letters 2025年第1期17卷 205-215页

作者： c.ng geng Kuanxiang Zhang changhua Wang chung Hsien Wu Jiwen Jiang Fei Long Liyuan Han Qifeng Han Yi‑Bing cheng Yong Peng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People’s Republic of China Triumph Photovoltaic Materials co. Ltd.No.1001 Yannan AvenueHigh‑Tech Development DistrictBengbuAnhui 233000People’s Republic of China college of Materials Science and Engineering Guilin University of TechnologyGuilin 541004People’s Republic of China State Key Laboratory of Metal Matrix composites Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Two-terminal(2-T)perovskite(PVK)/cuIn(Ga)Se_(2)(cIGS)tandem solar cells(TScs)have been considered as an ideal tandem cell because of their best bandgap matching regarding to Shockley–Queisser(S–Q)***,the nature of the irregular rough morphology of commercial cIGS prevents people from improving tandem device *** this paper,D-homoserine lactone hydrochloride is proven to improve coverage of PVK materials on irregular rough cIGS surfaces and also passivate bulk defects by modulating the growth of PVK *** addition,the minority carriers near the PVK/c60 interface and the incompletely passivated trap states caused interface recombination.A surface reconstruction with 2-thiopheneethylammonium iodide and N,N-dimethylformamide assisted passivates the defect sites located at the surface and grain ***,LiF is used to create this field effect,repelling hole carriers away from the PVK and c60 interface and thus reduc.ng *** a result,a 2-T PVK/cIGS tandem yielded a power conversion efficiency of 24.6%(0.16 cm^(2)),one of the highest results for 2-T PVK/cIGS TScs to our *** validation underscores the potential of our methodology in achieving superior performance in PVK/cIGS tandem solar cells.

关键词： PVK/cIGS TScs Irregular rough surfaces Modulating the growth PVK/c60 interface recombination

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A Flexible Smart Healthcare Platform conjugated with Artificial Epidermis Assembled by Three‑Dimensionally conductive MOF Network for Gas and Pressure Sensing

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Nano-Micro Letters 2025年第2期17卷 601-620页

作者： Qingqing Zhou Qihang Ding Zixun geng chencheng Hu Long Yang Zitong Kan Biao Dong Miae Won Hongwei Song Lin Xu Jong Seung Kim State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012People’s Republic of China Department of chemistry Korea UniversitySeoul 02841Republic of Korea Theranochem Incorporation Seoul 02856Republic of Korea

The rising flexible and intelligent electronics greatly facilitate the noninvasive and timely tracking of physiological information in telemedicine *** building bionic-sensitive moieties is vital for designing efficient electronic skin with advanced cognitive functionalities to pluralistically capture external ***,realistic mimesis,both in the skin’s three-dimensional interlocked hierarchical structures and synchronous encoding multistimuli information capacities,remains a challenging yet vital need for simplifying the design of flexible logic ***,we construct an artificial epidermal device by in situ growing cu_(3)(HHTP)_(2) particles onto the hollow spherical Ti_(3)c_(2)T_(x) surface,aiming to concurrently emulate the spinous and granular layers of the skin’s *** bionic Ti_(3)c_(2)T_(x)@cu_(3)(HHTP)_(2) exhibits independent NO_(2) and pressure response,as well as novel functionalities such as acoustic signature perception and Morse code-encrypted message ***,a wearable alarming system with a mobile application terminal is self-developed by integrating the bimodular senor into flexible printed *** system can assess risk factors related with asthmatic,such as stimulation of external NO_(2) gas,abnormal expiratory behavior and exertion degrees of fingers,achieving a recognition accuracy of 97.6%as assisted by a machine learning *** work provides a feasible routine to develop intelligent multifunctional healthcare equipment for burgeoning transformative telemedicine diagnosis.

关键词： Ti_(3)c_(2)T_(x)@cu_(3)(HHTP)_(2)composites NO_(2)/pressure flexible sensors Health-monitoring Machine learning

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石墨烯褶皱结构对双电层储能性能的理论研究

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原子与分子物理学报 2025年第6期42卷 89-100页

作者：张倩蒋更平武汉科技大学理学院应用物理系武汉430081

石墨烯因其出色的比表面积和单层结构而被广泛认为是一种理想的电极材料.然而,实验制备的石墨烯常因官能团、缺陷和位错的引入而出现褶皱和变形.针对这一问题,本文构建了一系列具有不同幅度褶皱(a=0~6.6?)的石墨烯片,并运用分子动力学... 详细信息

石墨烯因其出色的比表面积和单层结构而被广泛认为是一种理想的电极材料.然而,实验制备的石墨烯常因官能团、缺陷和位错的引入而出现褶皱和变形.针对这一问题,本文构建了一系列具有不同幅度褶皱(a=0~6.6?)的石墨烯片,并运用分子动力学模拟来研究这些褶皱石墨烯表面的双电层结构.本研究旨在探讨不同褶皱高度和充电状态下双电层的变化规律,及其与超级电容器储能性能之间的关系.研究发现,褶皱石墨烯模型内部的离子浓度随电压的增加呈现多峰层状分布,而表面离子浓度与施加的电压正相关.此外,石墨烯的褶皱结构能够减少离子和水对电极电压响应的敏感性.在不同电压条件下,褶皱型石墨烯结构的面积比电容(c_A)始终高于其平面对应区域,突出了其在提升双电层储能性能上的优势.本研究揭示了石墨烯褶皱结构在调节离子分布、降低电压敏感性,以及增强电化学储能性能方面的特有作用机制.

关键词：双电层石墨烯褶皱恒电势模拟方法

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DNA Damage Response Inhibitor and Anti-PD-L1 Therapy for Prostate cancer: Development of Predictive Biomarkers

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Engineering 2022年第5期8卷 12-15页

作者： chuandong geng Timothy c.Thompson Department of Genitourinary Medical Oncology The University of Texas MD Anderson Cancer CenterHoustonTX 77030USA

*** Although androgen receptor biosynthesis and signaling inhibi-tors have significantly improved outcomes in patients with castra-tion-resistant prostate cancer(cRPc),there is still a dearth of effective treatment op... 详细信息

关键词： cancer Therapy patients

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Origin of extension twinning-mediated static recrystallization and unique parallel alignment of(0001) poles to transverse direction in Mg-3Al-0.4Mn(mass%) alloy sheet

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Journal of Magnesium and Alloys 2023年第9期11卷 3200-3213页

作者： T.Nakata c.Xu L.geng S.Kamado Nagaoka University of Technology 1603-1KamitomiokaNagaoka 940-2188Japan School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001China

The origin of unique parallel alignment of(0001) poles to transverse direction(TD) was investigated using Mg-3Al-0.4Mn(mass%)alloy sheets rolled with different process conditions. When rolling was performed with intermediate reheating, the alloy showed a sluggish static recrystallization(SRX) behavior during post-annealing, facilitating the nucleation and growth of statically recrystallized grains from extension twins. This resulted in the apparent texture component with the parallel alignment of the(0001) poles to the TD, and the sheet exhibited good ductility for both the rolling direction(RD) and TD. In contrast, continuous rolling without intermediate reheating led to the formation of severely deformed regions near double twins. SRX was promoted at such regions, forming a typical basal textural feature with weak RD-split of the(0001) poles. Although extension twins were formed after the continuous rolling, SRX was facilitated at the severely deformed regions with double twins, and the formation of the unique alignment of the(0001) poles to the TD was suppressed. The RD-split texture led to the large elongation to failure along the RD, while it along the TD decreased owing to the narrow distribution of the(0001)poles toward the TD, resulting in the in-plane anisotropy in ductility.

关键词： Magnesium Rolling Twinning Static recrystallization Texture

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Preparation of ultramicro molybdenum carbide powders and study on wear properties of their coating

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Rare Metals 2011年第3期30卷 262-266页

作者： AN geng LIU Gaojie Technical center Jinduicheng Molybdenum Co. Ltd Xi＇an 710077 China School of Material Science and Engineering Xi＇an Jiaotong University Xi＇an 710049 China

Using specially designed mechanochemical ball-mill equipment, ultramicro molybdenum carbide （Moc） powders were prepared by high-energy ball milling from pure molybdenum powders in civil coal gas atmosphere at room temperature. The structure and the particle size of the powders were investigated by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, and Transmission Electron micros-copy （TEM）. The results showed that after milling for 30 h, the Moc powders of hexagonal structure were obtained, and their average parti-cle size was around 100 nm. It was found that chemisorption of cO in coal gas onto the fresh molybdenum surfaces created by milling was the predominant processes during the solid-gas reaction, and the energy input due to the introduction of highly dense grain boundaries and lattice defects provided the activation energy for the transition from Mo-c chemisorption to Moc. A coating was formed on the 40cr steel base using plasma spray by mixing Ni60 alloy powders and ultramicro Moc powders of 5 wt.%, 10 wt.%, and 15 wt.%, respectively. coat-ing abrasion tests under the condition of dry-grinding, 2 h wear time, and 300 N load showed that the wear resistance property of the coating added with ultramicro Moc powders could be improved greatly, and the wear resistance property of the coating increased with the increase of ultramicro Moc content. The wear mechanisms of ultramicro Moc coating is mainly plough wear and flaking wear assisted. In the abra-sion process, the evenly distributed ultramicro Moc particles play a dispersion strengthening and self-lubricating role in the coating.

关键词： powders molybdenum carbide coatings wear resistance ball milling

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Technologies for Efficient Use of Irrigation Water and Energy in china

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Journal of Integrative Agriculture 2013年第8期12卷 1363-1370页

作者： ZHAng Qing-tao XIA Qing clark c K Liu Shu geng Key Laboratory for Urban Habitat Environmental Science and Technology School of Environment and EnergyPeking University Shenzhen Graduate School Department of civil and Environmental Engineering University of Hawaii at Manoa Department of Plant Sciences University of California

While the shortage of water and energy is a well-recognized worldwide natural resources issue, little attention has been given to irrigation energy efficiency. In this paper, we examine the potential energy savings that can be achieved by implementing improved irrigation technologies in china. The use of improved irrigation management measures such as a flow meter, irrigation scheduling, and/or regular maintenance and upgrades, typically reduces the amount of water pumped over the course of a growing season. The total energy saved by applying these improved measures could reach 20%, as compared with traditional irrigation methods. Two methods of irrigation water conveyance by traditional earth canal and low pressure pipeline irrigation （LPPI） were also evaluated. Our study indicated that LPPI could save 6.48x 109 kWh yr1 when applied to 11 chinese provinces. Also, the cOz emission was reduced by 6.72 metric tons per year. Among these 11 surveyed provinces, the energy saving potential for two provinces, Hebei and Shandong, could reach 1.45 x 109 kWh yr^-1. Using LPPI, potential energy saved and cO2 emissions reduced in the other 20 chinese provinces were estimated at about 2.97×109 kWh yr-1 and 2.69 metric tons per year, respectively. The energy saving potential for Heilongjiang, a major agriculture province, could reach 1.77× 109 kWh yr-1, which is the largest in all provinces. If LPPI is applied to the entire country, average annual energy saving of more than 9 billion kWh and average annual cO2 emission reduction of more than 9.0 metric tons could be realized. Rice is one of the largest users of the world＇s fresh water resources. compared with continuous flooding irrigation, intermittent irrigation （ITI） can improve yield and water-use efficiency in paddy fields. The total increments of net output energy and yield by ITI in paddy fields across china could reach 2.5× 1016 calories and l07 tons, respectively. So far only a small part of agricultural land in china ha

关键词： water and energy efficiency irrigation management low pressure pipeline irrigation energy saving potential,intermittent irrigation

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Large m asymptotics for minimal partitions of the Dirichlet eigenvalue

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Science china Mathematics 2022年第1期65卷 1-8页

作者： Zhiyuan geng Fanghua Lin courant Institute of Mathematical Sciences New York UniversityNew YorkNY 10012USA

In this paper,we study large m asymptotics of the l 1 minimal m-partition problem for the Dirichlet *** any smooth domainΩ⊂R^(n)such that|Ω|=1,we prove that the limit lim_(m→∞)l^(1)_(m)(Ω)=c 0 exists,and the constant c 0 is independent of the shape ofΩ.Here,l^(1)_(m)(Ω)denotes the minimal value of the normalized sum of the first Laplacian eigenvalues for any m-partition ofΩ.

关键词： Dirichlet eigenvalue l1 minimal partition problem large m asymptotics

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NOx Emission Reduction Technology for Marine Engine Based on Tier-Ⅲ:A Review

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Journal of Thermal Science 2020年第5期29卷 1242-1268页

作者： LU Xiuwei geng Peng cHEN Yunyue Merchant Marine college Shanghai Maritime UniversityShanghai 201306China Tianjin Research Institute of Water Transport Engineering Tianjin 300456China

The development of maritime trade has greatly promoted the development of diesel ***,with the increasingly serious environmental problems,more and more attention has been paid to the exhaust emissions of high-power marine diesel *** restrictions on SOx have been implemented globally,and the limitation of the NO,will be the next *** paper illustrates(a)Principle and research progress of NOx emissions-reduction technology of marine diesel engine;(b)Summary of advantages and disadvantages among various reduction technologies and their reduction effects;(c)The application effect of mainstream technology on ***,since exhaust gas recirculation(EGR)can achieve Tier-Ⅲ directly from Tier-Ⅰ without considering the increased fuel *** is deemed as the most promising technology to reduce emissions by controlling combustion ***,EGR has shortcomings of excessive increase in ftiel consumption and generation of waste water,which need to be solved ***,selective catalytic reduction(ScR)is the most effective and straightforward means to achieve Tier-Ⅲ.Despite of the continuous optimization of ScR unit volume,the problem of scrap catalyst seriously limits its wide *** to match the supercharger more efficiently is a key factor in choosing between high and low pressure ***,nature gas(ng)engines are capable of achieving a reduction in NOx,but in order to meet the requirements of Tier-Ⅲ,it still needs to be assisted by other *** emissions of hydrocarbon(Hc)and cO in ng engines are huge defects that must be ***,technologies such as the Miller cycle,Two-stage supercharging and mixed-water combustion can also reduce emissions but were rarely used *** technologies can be combined with EGR,ScR and ng engines to optimize the enginesJ economy and emission characteristics.

关键词： marine engine NOx emission Tier-Ill exhaust gas recirculation(EGR) selective catalytic reduction(ScR) dual-fuel

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cRAcK GROWTH BEHAVIOR AND FRAcTURE FEATURE OF GH2132 UNDER cREEP-FATIGUE cONDITIONS

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Acta Metallurgica Sinica(English Letters) 1997年第6期10卷 495-500页

作者： geng, M.F. Luoyang Ship Material Research Inst Luoyang China

The superalloy GH2132 is equivalent to A286. The tests were carried out at 550°c under various cyclic frequencies (hold time) and load levels, and the fracture surfaces were examined by using a scanning electron microscope. It was shown that the fracture mode of creep-fatigue and the effect of cyclic loading on crack growth change with the growth of crack and the increase of net-section stress, and both are reversed when the net-section stress is up to the yield stress of material. When σn0.2, cracking is predominantly cyclic-dependent transgranular and cyclic loading accelerates creep crack growth, whereas when σn>σ0.2, the case is reversed.

关键词： chromium alloys crack propagation creep Fracture Nickel alloys Rotating disks Superalloys

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