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Interface Modification of TiO_(2)Electron Transport Layer with PbCl_(2)for Perovskiote Solar Cells with Carbon Electrode

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Tsinghua Science and technology 2022年第4期27卷 741-750页

作者： Abolfazl Amraeinia Yuhua Zuo Jun Zheng Zhi Liu Guangze Zhang Liping Luo Buwen Cheng Xiaoping Zou Chunbo Li Key Laboratory on Integrated Optoelectronics Institute of SemiconductorChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for SensorMOE Key Laboratory for Modern Measurement and Control TechnologyBeijing Information Science and Technology UniversityBeijing 100101China School of Science Minzu University of ChinaBeijing 100081China

Perovskite Solar Cells(PSCs)have attracted considerable attention because of their unique features and high ***,the stability of perovskite solar cells remains to be *** this study,we modified the TiO_(2)Electron Transport Layer(ETL)interface with PbCl_(2).The efficiency of the perovskite solar cells with carbon electrodes increased from 11.28%to 13.34%,and their stability obviously *** addition of PbCl_(2)had no effect on the morphology,crystal structure,and absorption property of the perovskite absorber ***,it affected the band energy level alignment of the solar cells and accelerated the electron extraction and transfer at the interface between the perovskite layer and the ETL,thus enhancing the overall photovoltaic *** interfacial modification of ETL with PbCl_(2)is a promising way for the potential commercialization of low-cost carbon electrode-based perovskite solar cells.

关键词： Perovskite Solar Cell(PSC) Electron Transport Layer(ETL) electron and hole recombination modification stability

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Isotropic power-law decay indices of LDOS oscillations induced by line defects in monolayer black phosphorus

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Physical Review B 2025年第16期111卷 165419-165419页

作者： Xiaoying Zhou Qianwen Ou Wang Chen Hunan Provincial Key Laboratory of Intelligent Sensors and Advanced Sensor Materials School of Physics and Electronics Science Hunan University of Science and Technology Xiangtan 411201 China Department of Physics Hunan Normal University Changsha 410081 China

Due to its anisotropic crystal structure, the electronic, optical, and thermal properties of two-dimensional black phosphorus (BP) exhibit significant anisotropy. In this study, we investigate the oscillations of the local density of states (LDOS) near a line defect in monolayer BP. Utilizing the two-band effective k·p Hamiltonian, we numerically calculate the LDOS using the transfer matrix method and analytically derive the power-law decay indices of the LDOS oscillation patterns based on the stationary phase approximation. We find that the power-law decay indices of the LDOS oscillation patterns are always −1/2 irrespective of the orientation of the defects, indicating a remarkable isotropic behavior. While, the magnitude and period of the LDOS patterns are highly sensitive to the orientation of the line defect, which serves as a manifestation of the anisotropy inherent in BP. These results highlight a unique aspect of BP and are also applicable to commensurate multilayer BP, as they share a similar Hamiltonian to that of the monolayer.

关键词： Crystal orientation

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Hydrogen sulfide chemiresistive sensor based on swift heavy ion irradiated cerium-based metal–organic framework/graphene oxide composite

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Synthetic Metals 2024年 306卷

作者： More, Mayuri S. Bodkhe, Gajanan A. Singh, Fouran Dole, Babasaheb N. Tsai, Meng-Lin Hianik, Tibor Shirsat, Mahendra D. RUSA Centre for Advanced Sensor Technology Department of Physics Dr Babasaheb Ambedkar Marathwada University MS Aurangabad431004 India Department of Food Science and Technology Yeungnam University Gyeongsan Gyeongsangbuk-do38541 Korea Republic of New Delhi110067 India Department of Materials Science and Engineering National Taiwan University of Science and Technology Taipei10607 Taiwan Department of Nuclear Physics and Biophysics Faculty of Mathematics Physics and Informatics Comenius University Bratislava842 48 Slovakia

Herein, we report ultrahigh sensitive and selective hydrogen sulfide (H2S) chemiresistive sensor using SHI irradiated cerium-based metal–organic framework (MOF)/graphene oxide composite (Ce-BTC/GO). The solvothermal synthesized Ce-BTC/GO coated on an indium tin oxide (ITO) electrode, irradiated by the 100 MeV Au+ ion at the fluence rate 5 × 1010 ions/s, 5 × 1011 ions/s and 5 × 1012 ions/s has been tested for chemiresistive sensing of H2S. As irradiated, Ce-BTC/GO was multi-parametrically tested for XRD, FE-SEM, FTIR spectroscopy, Raman spectroscopy and I-V characteristics for its structural, morphological, spectroscopic and electrical characteristics. The result reveals that the irradiation treatment greatly affects the electric characteristics of the GO, achieving dramatic conductivity modulation in the presence of H2S gas, it also creates the surface sites for the H2S absorption and hence shows excellent real-time sensing performance below the maximum residue limit established by OSHA (Occupational Safety and Health Administration). SHI irradiated Ce-BTC/GO sensor also shows excellent response/recovery time, ultrahigh reproducibility, good repeatability and stability at room temperature. The sensor allows the detection of H2S with a sensitivity of 54.70% in a concentration range of 10–100 ppm with a limit of detection 10 ppm. © 2024 Elsevier B.V.

关键词： Fourier transform infrared spectroscopy

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Experimental and Ab Initio Studies of the Structural and Optoelectronic Properties of Hexagonal Wurtzite Zno1-Xsx Alloys

SSRN

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SSRN 2023年

作者： Lakshmanan, A. Alex, Zachariah C. Meher, Samir Ranjan Department of Physics School of Advanced Sciences Vellore Institute of Technology Vellore632014 India Department of Sensor and Biomedical Technology School of Electronics Engineering Vellore Institute of Technology Vellore632014 India

The structural and optoelectronic properties of ZnO1-xSx alloys were explored experimentally as well as through ab initio calculations. The radiofrequency magnetron sputtering was used to grow ZnO1-xSx alloy thin film... 详细信息

关键词： Thin films

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Bifunctional Supercapacitor and Photocatalytic Properties of Cuboid Ni-TMA MOF Synthesized Using a Facile Hydrothermal Approach

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Journal of Electronic Materials 2024年第1期53卷 16-29页

作者： Narwade, Vijaykiran N. Rahane, Ganesh K. Bogle, Kashinath A. Tsai, Meng-Lin Rondiya, Sachin R. Shirsat, Mahendra D. RUSA Centre for Advanced Sensor Technology Dr. Babasaheb Ambedkar Marathwada University Maharashtra Aurangabad431 004 India Department of Materials Engineering Indian Institute of Science Bangalore560 012 India School of Physical Sciences Swami Ramanand Teerth Marathwada University Maharashtra Nanded431 606 India Department of Materials Science and Engineering National Taiwan University of Science and Technology Taipei10607 Taiwan Department of Nuclear Physics and Biophysics Faculty of Mathematics Physics and Informatics Comenius University Bratislava842 48 Slovakia

Metal–organic frameworks (MOFs) with a substantial surface area and configurable porosity have gained the interest of researchers in energy storage devices and environmental management. Our investigation efficaciously employs a cuboid-shaped nickel and trimesic acid metal–organic framework (Ni-TMA MOF) as a bifunctional high-performance supercapacitor electrode as well as an efficient photocatalyst. The Ni-cuboid-like MOF's structure provides more electroactive sites along with a shorter pathway for electron transfer and electrolyte diffusion, resulting in a high specific capacitance of 236 F g−1 at 1 A g−1. The fabricated electrode exhibits particularly high capacitance retention, with over 98% retention even after 1000 cycles. The photocatalytic activity of the Ni-TMA MOF for the degradation of rhodamine 6G dye was investigated, which revealed that 90% of the dye was degraded in nearly 40 min, which follows the modified Freundlich process. The development of multifunctional materials to address emerging problems is of paramount importance, and this work ensures this possibility, with results showing improved energy storage and photocatalytic capability. Graphical Abstract: [Figure not available: see fulltext.] © 2023, The Minerals, Metals & Materials Society.

关键词： Supercapacitor

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Development of an ultrafast photo-switch device using surface passivated nanocrystalline CdS thin film

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Materials Today: Proceedings 2023年 92卷 856-858页

作者： Halge D.I. Khanzode P.M. Kaawash N.M.S. Thabit M.Y.H. Narwade V.N. Dahiwale S.S. Bogle K.A. Thin Film and Devices Laboratory School of Physical Sciences Swami Ramanand Teerth Marathwada University Nanded 431606 India RUSA Centre for Advanced Sensor Technology Dr. Babasaheb Ambedkar Marathwada University Aurangabad 431 004 India Department of Physics Savitribai Phule Pune University Pune 411007 India

The development of an ultrafast optical switch is demonstrated in this work using a surface passivated nanocrystalline cadmium sulfide (CdS) thin film. The optical switching ratio of the Ag/CdS/Ag device, after surface passivation with nitrocellulose, is 2.1 × 104 in just 0.4 ms under a constant bias of 10 V and blue light (380 nm) of intensity ∼7.4 mW/cm2, which is 100 times higher than the native device. This is because the surface sulphur vacancy defects are suppressed, increasing the concentration of photo-generated free carriers. © 2023

关键词： CdS-thin-film Nano-crystalline Photo-switch Quick responsive Surface modification

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Improved Particle Swarm Optimization Algorithm for EIT Image Reconstruction 20

Improved Particle Swarm Optimization Algorithm for EIT Image...

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20th International Multi-Conference on Systems, Signals and Devices, SSD 2023

作者： Kahouli, Oumayma Hafsa, Mariem Hellara, Hiba Bennour, Imed Eddine Essoukri Ben Amarax, Najoua Kanoun, Olfa University of Sousse National Engineering School of Sousse Department of Computer Science Sousse4023 Tunisia National Engineering School of Sousse Laboratory of Advanced Technology and Intelligent Systems Tunisia Technische Universität Chemnitz Laboratory of Measurement and Sensor Technology Chemnitz Germany University of Sfax Laboratory of Signals Systems Artificial Intelligence and Networks Digital Research Center of Sfax Tunisia

ISBN: (纸本)9798350332568

Electrical Impedance Tomography (EIT) is a clinical imaging technique that gained a lot of attention because it is a non-invasive and radiation-free method. To obtain an inner image of the domain under study, a specific number of electrodes is attached to the surface of the object, then through a pair of electrodes, a low alternative current is injected. Potentials produced by this injection are measured with the remaining electrodes. Based on these boundary voltages measurements, the inner conductivity can be inferred, thus the image is reconstructed. The focus of this paper is to overcome the major weakness of the EIT image reconstruction technique, which is the low spatial resolution of the reconstructed images caused by the non-linearity of EIT inverse problem. This paper considers this problem, an optimization problem that is solved using the Particle Swarm Optimization (PSO) meta-heuristic. A variant of the standard PSO is proposed and validated, first on a circular mesh composed of 686 triangles then on a lung mesh composed of 2707 triangles. © 2023 IEEE.

关键词： Electrodes

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Electrical Impedance Tomography Image Reconstruction with apriori Knowledge for Gesture Recognition 19

Electrical Impedance Tomography Image Reconstruction with ap...

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19th IEEE International Multi-Conference on Systems, Signals and Devices, SSD 2022

作者： Alasasfeh, Hayat Hafsa, Mariem Bader, Oumaima Ibbini, Mohammed Hasan, Sameer Kanoun, Olfa Jordan University of Science and Technology Biomedical Engineering Department Irbid Jordan Université de Sousse Ecole Nationale d'Ingénieurs de Sousse LATIS- Laboratory of Advanced Technology and Intelligent Systems Sousse4023 Tunisia Measurement and Sensor Technology Technische Universität Chemnitz Chemnitz Germany

ISBN: (数字)9781665471084

ISBN: (纸本)9781665471084

Electrical impedance tomography (EIT) reconstructs the conductivity images of an object based on the voltages and the currents at the surface of the object. Among the clinical applications of EIT thorax imaging, brain function monitoring and breast cancer screening. However, EIT suffers from a poor signal-to-noise ratio and spatial resolution. To improve the quality of reconstructed images and provide clear information about the structure, the paper proposes to include prior knowledge about the structure from MRI. The proposed techniques could be very promising with more work. To illustrate this technique in this paper, eight electrodes with the adjacent current pattern were employed in this research. For each gesture, forty data points are recorded. The Gauss-Newton and Back-Projection algorithms are used for image reconstruction with prior knowledge of the human forearm from MRI images. The resultant contours of the Forearm, Ulna, and Radius have been used to build the mesh. In the Gauss-Newton algorithm, the results reveal that structural information improves image quality and conductivity distribution, particularly in the region of two bones. In addition, the reconstructed images using the Gauss-Newton algorithm performed better than images reconstructed using the back-projection algorithm. © 2022 IEEE.

关键词： Image reconstruction

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Confined cobalt single-atom catalysts with strong electronic metal-support interactions based on a biomimetic self-assembly strategy

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Carbon Energy 2024年第9期6卷 156-171页

作者： Bowen Guo Zekun Wang Lei Zheng Guang Mo Hongjun Zhou Dan Luo State Key Laboratory of Heavy Oil Processing Beijing Key Laboratory of Biogas Upgrading UtilizationCollege of New Energy and MaterialsChina University of Petroleum(Beijing)BeijingChina Beijing Key Laboratory of Micro-Nano Energy and Sensor CAS Center for Excellence in NanoscienceBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijingChina School of Chemical Engineering Shandong Institute of Petroleum and Chemical TechnologyDongyingShandongChina School of Chemistry Beijing Advanced Innovation Center for Biomedical EngineeringBeihang UniversityBeijingChina Institute of High Energy Physics Chinese Academy of SciencesBeijingChina

Designing high-performance and low-cost electrocatalysts for oxygen evolu-tion reaction(OER)is critical for the conversion and storage of sustainable energy *** by the biomineralization process,we utilized the phosphorylation sites of collagen molecules to combine with cobalt-based mononuclear precursors at the molecular level and built a three-dimensional(3D)porous hierarchical material through a bottom-up biomimetic self-assembly strategy to obtain single-atom catalysts confined on carbonized biomimetic self-assembled carriers(Co SACs/cBSC)after subsequent high-temperature *** this strategy,the biomolecule improved the anchoring efficiency of the metal precursor through precise functional groups;meanwhile,the binding-then-assembling strategy also effectively suppressed the nonspecific adsorption of metal ions,ultimately preventing atomic agglomeration and achieving strong electronic metal-support interactions(EMSIs).Experimental characterizations confirm that binding forms between cobalt metal and carbonized self-assembled substrate(Co–O_(4)–P).Theoretical calculations disclose that the local environment changes significantly tailored the Co d-band center,and optimized the binding energy of oxygenated intermediates and the energy barrier of oxygen *** a result,the obtained Co SACs/cBSC catalyst can achieve remarkable OER activity and 24 h durability in 1 M KOH(η_(10) at 288 mV;Tafel slope of 44 mV dec^(-1)),better than other transition metal-based catalysts and commercial IrO_(2).Overall,we presented a self-assembly strategy to prepare transition metal SACs with strong EMSIs,providing a new avenue for the preparation of efficient catalysts with fine atomic structures.

关键词： biomimetic self-assembly support electronic metal-support interactions oxygen evolution reaction single atoms catalysts

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Towards Efficient Gait Analysis Using Gyroscope: Preliminary Results and Insights

Towards Efficient Gait Analysis Using Gyroscope: Preliminary...

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International Conference on Smart sensors and Application (ICSSA)

作者： Thenmoli Manogar Ahmad Shakaff Ali Yeon Mohd Nor Fakhzan Mohd Kazim Shuhaida Yahud Centre of Excellence for Advanced Sensor Technology University Malaysia Perlis (UniMAP) Arau Perlis Faculty of Electrical Engineering Technology University Malaysia Perlis (UniMAP) Arau Perlis Faculty of Electronic Engineering and Technology University Malaysia Perlis (UniMAP) Arau Perlis

ISBN: (数字)9798350354294

ISBN: (纸本)9798350354300

Wearable sensor technology, combined with smartphone capabilities, has become a powerful and costeffective solution for gait analysis, offering real-time monitoring of human movements. This study introduces a sensor-based gait event detection system using gyroscope data from the publicly available MotionSense dataset to analyze walking and jogging. The dataset, which includes six subjects of varying demographics, provides a broader understanding of gait patterns. Gyroscope data from the X-axis was used to detect key biomechanical events, such as heel strikes, toe-offs, and mid-swings, as these align with the sagittal plane and are critical in understanding walking dynamics. The gait event detection algorithm The detection algorithm, developed in Python, incorporates advanced signal processing techniques like the Savitzky-Golay filter, to reduce noise while preserving key data. By using a threshold-based and sliding window methods, the system identifies gait events accurately and calculates key gait parameters such as cadence, stance time, swing time, and phase distributions. The results show significant differences between walking and jogging, with jogging exhibiting a higher cadence (82.71-90.23 steps/min) and shorter stance times (0.37-0.46 seconds) compared to walking (52.63-60.15 steps/min, stance time 0.61-0.85 seconds). This research demonstrates that wearable sensor technology offers precise and scalable alternatives to expensive, complex traditional gait analysis systems. The findings show the system's potential for clinical monitoring, rehabilitation, sports science, and smart wearable device development.

关键词： Legged locomotion Event detection Heuristic algorithms Signal processing algorithms Gain measurement Gyroscopes Wearable sensors Monitoring Intelligent sensors Sports

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