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Impact of π–bridge unit in fully nonfused ring electron acceptor on the photovoltaic performance of organic solar cells

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Chemical engineering Journal 2023年第1期473卷

作者： Liu, Wenlong Zheng, Xinming Ran, Guangliu Lu, Hao Xu, Xinjun Yao, Chuang Liu, Yahui Zhang, Wenkai Bo, Zhishan Key Laboratory of Energy Conversion and Storage Materials College of Chemistry Beijing Normal University Beijing100875 China of Chongqing School of Materials Science and Engineering Yangtze Normal University Chongqing408100 China College of Textiles & Clothing State Key Laboratory of Bio-fibers and Eco-textiles Qingdao University Qingdao266071 China College of Materials Science and Engineering Qingdao University Qingdao266071 China Department of Physics and Applied Optics Beijing Area Major Laboratory Center for Advanced Quantum Studies Beijing Normal University Beijing100875 China

Due to the advantages of simple synthesis and low cost, fully nonfused ring electron acceptors (FN-FREAs) have been developed in recent years. Almost all reported FN-FREAs use thiophene derivatives as π-bridging unit, while other π-bridging units have not yet been developed. Here, an FN-FREA M01 with 2,5-bis(alkyloxy)phenylene as the π-bridge unit is designed and synthesized to compare its photovoltaic property with an analogue M05 which uses 3,4-bis(alkyloxy)thiophene as the π-bridge unit. Although the only variation between M01 and M05 is the π-bridge unit, these two FN-FREAs demonstrate significantly different photovoltaic performances. Organic solar cells (OSCs) based on M01 exhibit a high power conversion efficiency of 13.70%, while M05 based one shows a much lower efficiency of 3.96% with a markedly reduced short-circuit current density. Fluorescence, Raman, electron paramagnetic resonance, and femtosecond time-resolved transient absorption spectroscopy prove that M05 tends to be oxidized to form radical cations which aggravates exciton quenching and charge carrier recombination in the active layer, while in M01 such radical cations are absent. All in all, we have demonstrated that the π-bridging unit of FN-FREAs is pivotal to the photovoltaic performance and provided a useful design strategy to low-cost, high-efficiency, and chemically stable acceptor materials. © 2023 Elsevier B.V.

关键词： Costs

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Orbital anomalous Hall effect in the few-layer Weyl semimetal TaIrTe4

arXiv

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arXiv 2024年

作者： Wang, An-Qi Li, Dong Zhao, Tong-Yang Liu, Xing-Yu Zhang, Jiantian Liao, Xin Yin, Qing Pan, Zhen-Cun Yu, Peng Liao, Zhi-Min State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics School of Physics Peking University Beijing100871 China Academy for Advanced Interdisciplinary Studies Peking University Beijing100871 China State Key Laboratory of Optoelectronic Materials and Technologies School of Materials Science and Engineering Sun Yat-sen University Guangzhou510275 China Hefei National Laboratory Hefei230088 China

We report on the observation of the linear anomalous Hall effect (AHE) in the nonmagnetic Weyl semimetal TaIrTe4. This is achieved by applying a direct current Idc and an alternating current Iω (Iω Idc) in TaIrTe4, where the former induces time-reversal symmetry breaking and the latter probes the triggered AHE. The anomalous Hall resistance VHω/Iω shows a linear dependence on Idc and changes sign with the polarity of Idc. In temperature-dependent measurements, VHω/Iω also experiences a sign reversal at ∼100 K, consistent with the temperature-dependent nonlinear Hall effect (NLHE). Furthermore, in measurements involving only dc transport, the dc Hall voltage exhibits a quadratic relationship with Idc. When the Idc direction is reversed, the Hall resistance changes sign, demonstrating a colossal nonreciprocal Hall effect (NRHE). Our theoretical calculations suggest that the observed linear AHE, NLHE, and NRHE all dominantly originate from the current-induced orbital magnetization compared to the minor spin contribution. This work provides deep insights into the orbital magnetoelectric effect and nonlinear Hall response, promising precise electric control of out-of-plane polarized orbit flow. © 2024, CC BY.

关键词： Spin Hall effect

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Organizational Culture's Significance in Technology and Innovation Management 2

Organizational Culture's Significance in Technology and Inno...

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2nd IEEE International Conference on Trends in Quantum Computing and Emerging Business Technologies, TQCEBT 2024

作者： Hari Krishna, Somanchi Fajarini, Ulfah Painoli, Arun Kant Visvesvaran, C. Jahnavi, K.N. Lourens, Melanie Vignana Bharathi Institute of Technology Department of Business Management Ghatkesar Mandal Medchal Malkajigiri Medchal Malkajigiri India Syarif Hidayatullah State Islamic University Faculty of Education Social Science Study Program Jakarta Indonesia Baddi University of Emerging Sciences and Technology School of Management Studies Himachal Pradesh Baddi India Sri Krishna College of Engineering and Technology Coimbatore India SIndhi Institute of Management Bangalore India Durban University of Technology Faculty of Management Sciences South Africa

ISBN: (纸本)9798350384277

Several studies have examined the connection between innovation, technology, and organizational culture in recent years. Management of technology and innovation is crucial to an organization's expansion and success. The development of an innovative organizational culture comes before technology and innovation management. This study's primary goal was to assess how organizational culture affects innovation in the Indian service sector. The study made use of a paradigm for understanding organisational culture created by Cameron and Quinn, which looks at culture as a collection of conflicting values from four angles. A descriptive survey research design was used in the investigation. Employees of service industries made up the study's population. More than twenty IT organizations participated in the survey, and 120 out of 180 respondents returned completed questionnaires. This indicated a response rate of 66%.The collected data was analyzed using inferential data analysis techniques and descriptive statistics. Tables and figures were created after analysis with IBM SPSS software. The results demonstrated that the strongest associations with innovation and technology were found in companies with flexible, collaborative, and employee-friendly cultures. Lastly, the study suggests areas for additional research, such as employing a new organizational culture model for the study or qualitative techniques for data collecting and analysis to reveal deeper cultural features. © 2024 IEEE.

关键词： importance Organisational culture service industry technology and innovation management

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Gradient Design with Low-Tortuosity Overcoming Kinetic Limitations in High-Loading Solid-State Cathodes

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Angewandte Chemie 2025年

作者： Guangzeng Cheng Jinping Yu Yonghui Wang Zhengyu Ju Yue Zhu Weiqian Tian Jingwei Chen Huanlei Wang Jingyi Wu Guihua Yu School of Materials Science and Engineering Ocean University of China Qingdao 266404 China Materials Science and Engineering Program and Walker Department of Mechanical Engineering The University of Texas at Austin Austin Texas 78712 USA

The extensive commercialization of practical solid-state batteries (SSBs) necessitates the development of high-loading solid-state cathodes with fast charging capability. However, electrochemical kinetics are severely delayed in thick cathodes due to tortuous ion transport pathways and slow solid-solid ion diffusion, which limit the achievable capacity of SSBs at high current densities. In this work, we propose a conductivity gradient cathode with low-tortuosity to enable facile ion transport and counterbalance ion concentration gradient, thereby overcoming the kinetic limitations and achieving fast charging capabilities in thick cathodes. The LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathodes deliver a room-temperature (RT) capacities of 147 and 110 mAh g −1 at 5 C and 10 C, respectively, and meanwhile achieve a RT areal capacity of 3.3 mAh cm −2 at 3 C, enabling SSBs simultaneously high energy and power densities. The universality of this strategy is demonstrated in LiFePO 4 cathodes, providing a novel solution for fast charging and large-scale application of high-loading SSBs.

关键词： solid-state battery composite cathode high-loading gradient low-tortuosity

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Enhancing wound healing and adhesion through dopamine-assisted gelatin-silica hybrid dressings

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International Journal of Biological Macromolecules 2024年第Part2期258卷 128845页

作者： Lin, Yu-Chien Wang, Huey-Yuan Tang, Yao-Chun Lin, Wan-Rong Tseng, Ching-Li Hu, Chih-Chien Chung, Ren-Jei Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei10608 Taiwan School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore639798 Singapore Department of Stomatology MacKay Memorial Hospital Taipei104217 Taiwan Graduate Institute of Biomedical Materials and Tissue Engineering College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan International Ph. D. Program in Biomedical Engineering College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Research Center of Biomedical Device College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan International Ph. D. Program in Cell Therapy and Regenerative Medicine College of Medicine Taipei Medical University Taipei11031 Taiwan Bone and Joint Research Center Chang Gung Memorial Hospital Linkou33305 Taiwan Taipei10608 Taiwan

Gelatin, widely employed in hydrogel dressings, faces limitations when used in high fluid environments, hindering effective material adhesion to wound sites and subsequently reducing treatment efficacy. The rapid degradation of conventional hydrogels often results in breakdown before complete wound healing. Thus, there is a pressing need for the development of durable adhesive wound dressings. In this study, 3-glycidoxypropyltrimethoxysilane (GPTMS) was utilized as a coupling agent to create gelatin-silica hybrid (G-H) dressings through the sol-gel method. The coupling reaction established covalent bonds between gelatin and silica networks, enhancing structural stability. Dopamine (DP) was introduced to this hybrid (G-H-D) dressing to further boost adhesiveness. The efficacy of the dressings for wound management was assessed through in-vitro and in-vivo tests, along with ex-vivo bioadhesion testing on pig skin. Tensile bioadhesion tests demonstrated that the G-H-D material exhibited approximately 2.5 times greater adhesion to soft tissue in wet conditions compared to pure gelatin. Moreover, in-vitro and in-vivo wound healing experiments revealed a significant increase in wound healing rates. Consequently, this material shows promise as a viable option for use as a moist wound dressing. © 2023

关键词： Adhesion

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Comparison of CMAS corrosion and sintering induced microstructural characteristics of APS thermal barrier coatings

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Journal of materials science & Technology 2019年第3期35卷 440-447页

作者： Yiyou Wu Hua Luo Canying Cai Yanguo Wang Yichun Zhou Li Yang Guangwen Zhou School of Materials Science and Engineering Xiangtan University Key Laboratory of Low Dimensional Materials & Application Technology of Ministry of Education Xiangtan University Department of Mechanical Engineering & Materials Science and Engineering Program State University of New York at Binghamton

The microstructural features of high-temperature sintered and CaO-MgO-Al_2O_3-SiO_2(CMAS) corroded air plasma sprayed Y_2O_3 stabilized ZrO_2(YSZ) thermal barrier coatings(TBCs) under the thermal gradient condition were comparatively studied. As-sprayed YSZ has a lamellar structure and the lamellae are composed of closely aligned columnar crystals. The sintered and the CMAS corroded YSZ coatings maintain the t'-ZrO_2 phase as the as-sprayed YSZ coating. The sintered YSZ remains the lamellar structure with reduced interlamellar gaps and grains coarsening. After the CMAS corrosion, the top layer of the YSZ coating keeps its lamellar structure consisting of some columnar grains with the CMAS infiltration into the intergrain gaps and the formation of striped Zr_2Y_2 O_7. The typical lamellar structure transforms into more equiaxed grains in the middle and bottom layers of the ceramic coating along with significant infiltration of amorphous CMAS and anorthite formation in the bottom layer owing to the high contents of Ca and Al.

关键词： YSZ thermal barrier coating APS CMAS corrosion Anorthite

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Rheology and 3d Printing of Alginate Bio-Stabilized Earth Concrete

SSRN

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SSRN 2023年

作者： Maierdan, Yierfan Armistead, Samuel J. Mikofsky, Rebecca A. Huang, Qiqi Ben-Alon, Lola Srubar, Wil V. Kawashima, Shiho Columbia University Department of Civil Engineering and Engineering Mechanics New YorkNY10027 United States Columbia University Graduate School of Architecture Planning and Preservation New YorkNY10027 United States University of Colorado Boulder Department of Civil Environmental and Architectural Engineering United States University of Colorado Boulder Materials Science and Engineering Program United States

Driven by the need for sustainable construction solutions, there is renewed interest in earth-based materials. Biopolymer stabilizers can enhance the rheological and structural properties of these materials to facilitate their use in 3D printing. This research examined the influence of sodium alginate on the stability, particle interaction, rheology, and 3D printability of kaolinite, a commonly found clay mineral in soils deemed suitable for construction. Findings revealed that sodium alginate could boost electrostatic interactions to enhance the stability of kaolinite suspensions. This rise in repulsive potential energy also reduced storage modulus and yield stress by orders of magnitude. However, as the alginate content increased beyond its cross-linking concentration (0.12% - 0.6%), a reverse trend was observed, which was attributed to the formation of a three-dimensional polymer network. Furthermore, alginate addition shifted the "printability window" of kaolinite suspensions to mixtures with higher solid contents, which has positive implications on strength and shrinkage. © 2023, The Authors. All rights reserved.

关键词： Biomolecules

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Nonlinear Self-Calibrated Spectrometer with Single GeSe-InSe Heterojunction Device

arXiv

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arXiv 2023年

作者： Darweesh, Rana Yadav, Rajesh Kumar Adler, Elior Poplinger, Michal Levi, Adi Lee, Jea-Jung Leshem, Amir Ramasubramaniam, Ashwin Xia, Fengnian Naveh, Doron Faculty of Engineering Bar-Ilan University Ramat-Gan52900 Israel Institue of Nanotechnology and Advanced Materials Bar-Ilan University Ramat-Gan52900 Israel Department of Electrical Engineering Yale University New HavenCT United States Department of Mechanical and Industrial Engineering University of Massachusetts AmherstMA01003 United States Materials Science and Engineering Graduate Program University of Massachusetts AmherstMA01003 United States

Optical spectroscopy – the measurement of electromagnetic spectra – is fundamental to various scientific domains and serves as the building block of numerous technologies.1–3 Computational spectrometry is an emerging field that employs an array of photodetectors with different spectral responses or a single photodetector device with tunable spectral response, in conjunction with numerical algorithms, for spectroscopic measurements.4–6 Compact single photodetectors made from layered materials are particularly attractive, 7–9 since they eliminate the need for bulky mechanical and optical components used in traditional spectrometers and can easily be engineered as heterostructures to optimize device performance.7,10 However, compact tunable photodetectors are typically nonlinear devices and this adds complexity to extracting optical spectra from the device response. Here, we report on the training of an artificial neural network (ANN) to recover the full nonlinear spectral photoresponse - a nonlinear problem of high dimensionality - of a single GeSe-InSe p-n heterojunction device. We demonstrate the functionality of a calibrated spectrometer in the spectral range of 400-1100 nm, with a small device footprint of ~25 × 25 μm, and we achieve a mean reconstruction error of 2 × 10-4 for the power-spectrum at a spectral resolution of 0.35 nm. Using our device, we demonstrate a solution to metamerism, an apparent matching of colors with different power spectral distributions, which is a fundamental problem in optical *** Codes Nonlinear Self-Calibrated Spectrometer, Artificial neural network, Optical imaging © 2023, CC BY.

关键词： Spectrometers

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Minimizing finite viscosity enhances relative kinetic energy absorption in bistable mechanical metamaterials but only with sufficiently fine discretization: a nonlinear dynamical size effect

arXiv

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arXiv 2024年

作者： Xiu, Haning Fancher, Ryan Frankel, Ian Ziemke, Patrick Fermen-Coker, Müge Begley, Matthew Boechler, Nicholas Department of Mechanical and Aerospace Engineering University of California La Jolla San DiegoCA United States Department of Mechanical Engineering University of California Santa Barbara Santa BarbaraCA United States Materials Department University of California Santa Barbara Santa BarbaraCA United States DEVCOM Army Research Laboratory Aberdeen Proving GroundMD United States Program in Materials Science and Engineering University of California La Jolla San DiegoCA United States

Bistable mechanical metamaterials have shown promise for mitigating the harmful consequences of impact by converting kinetic energy into stored strain energy, offering an alternative and potentially synergistic approach to conventional methods of attenuating energy transmission. In this work, we numerically study the dynamic response of a one-dimensional bistable metamaterial struck by a high speed impactor (where the impactor velocity is commensurate with the sound speed), using the peak kinetic energy experienced at midpoint of the metamaterial compared to that in an otherwise identical linear system as our performance metric. We make five key findings: 1) The bistable material can counter-intuitively perform better (to nearly 103× better than the linear system) as the viscosity decreases (but remains finite), but only when sufficiently fine discretization has been reached (i.e. the system approaches sufficiently close to the continuum limit);2) This discretization threshold is sharp, and depends on the viscosity present;3) The bistable materials can also perform significantly worse than linear systems (for low discretization and viscosity or zero viscosity);4) The dependence on discretization stems from the partition of energy into trains of solitary waves that have pulse lengths proportional to the unit cell size, where, with intersite viscosity, the solitary wave trains induce high velocity gradients and thus enhanced damping compared to linear, and low-unit-cell-number bistable, materials;and 5) When sufficiently fine discretization has been reached at low viscosities, the bistable system outperforms the linear one for a wide range of impactor conditions. The first point is particularly important, as it shows the existence of a nonlinear dynamical "size effect", where, given a protective layer of some thickness and otherwise identical quasi-static mechanical properties and total mass, e.g., a 1 mm thick layer having 200 unit cells of 5 µm thickness is predicte

关键词： Kinetic energy

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Highly sensitive spin-flop transition in antiferromagnetic van der Waals material MPS3 (M=Ni and Mn)

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Physical Review materials 2021年第6期5卷 064413-064413页

作者： Rabindra Basnet Aaron Wegner Krishna Pandey Stephen Storment Jin Hu Department of Physics University of Arkansas Fayetteville Arkansas 72701 USA Materials Science and Engineering Program Institute for Nanoscience and Engineering University of Arkansas Fayetteville Arkansas 72701 USA

Recent developments in two-dimensional (2D) magnetism have motivated the search for van der Waals (vdW) magnetic materials to explore magnetic phenomena in the 2D limit. Metal thiophosphates, MPX3, are a class of magnetic vdW materials with antiferromagnetic ordering persisting down to the atomically thin limit. The magnetism in this material family has been found to be highly dependent on the choice of transition metal M. In this work, we have synthesized the intermediate compounds Ni1−xMnxPS3 (0≤x≤1) and investigated their magnetic properties. Our study reveals that the variation of Ni and Mn content in Ni1−xMnxPS3 can efficiently tune the spin-flop transition, likely due to the modulation of the magnetic anisotropy. Such effective tuning offers a promising candidate to engineer 2D magnetism for future device applications.

关键词： Magnetic anisotropy Magnetic order

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