Ravinder S. Dahiya’s Post

P(VDF-TrFE) Nanofibers with Ultrathin MoS2 Nanofillers for Improved Energy Harvesting Efficiency! See our new article (https://lnkd.in/eH9Bjwfw) published in IEEE Sensors Letters. This paper demonstrates how the triboelectric nanogenerators (TENGs), developed using electrospun nanofibers of poly(vinylidene fluoridetrifluoroethylene) (P(VDF-TrFE)) and molybdenum sulfide (MoS2) nanofillers, could have more than 6 times jump (from 26 V for TENGs without nanofillers to 162V) in their output voltage. The highest jump in the output voltage was obtained with sample having 0.07wt% of MoS2. The distinctive features of this work include facile synthesis of ultrathin conductive MoS2 using a modified hydrothermal method and the innovative introduction of sulfur vacancies in the nanofibers, which eventually led to significantly higher output voltage. The observed jump in the performance of TENGs underscores the potential of incorporating sulfur vacancy enriched MoS2, as a robust method to improve the usage of wearable energy harvesters. Congratulations Sofia Sandhu et al. Ravinder S. Dahiya Electrical & Computer Engineering Department, Northeastern University Northeastern University College of Engineering Northeastern University #sensors #electronics #energyharvesting #teng #electrospinning #advancedmaterials #advancedmanufacturing #flexibleelectronics #printedelectronics #wearables

If you are interested in learning about synthesizing ultrathin MoS2 nanoflakes via a simple one-step hydrothermal reaction, and understanding how their strategic integration with PVDF-TrFE nanofibers significantly boosts the output of a triboelectric nanogenerator (from 26 V in TENGs without nanofillers to 162 V), then this study is for you. The remarkable increase in TENG performance highlights the effectiveness of incorporating sulfur vacancy-enriched MoS2 as a powerful approach to enhance the efficiency of wearable energy harvesters. My contribution to this work involved the electrospinning of the fibers, their characterization, and the fabrication and testing of the devices. #sensors #electronics #energyharvesting #teng #electrospinning #advancedmaterials #advancedmanufacturing #flexibleelectronics #printedelectronics #wearables

In a recently published paper, EPFL scientists Giulia Tagliabue and Tarique Anwar report a #nanodevice that can be used to harvest electricity from evaporating tap or seawater, contradicting the idea that highly purified water is required to produce #hydrovoltaic #energy. And because hydrovoltaic devices could theoretically be operated anywhere there is liquid – or even moisture, like sweat – they could also be used to power sensors for connected devices. Read more: https://lnkd.in/eTXNVNhS

🌟Excited to share that my latest research paper titled "Enhanced Optoelectronic Traits of Monolayer h-BAs for Augmented NOx (NO and NO2) Gas Sensing" has been published in the prestigious IEEE Sensors Journal! I would like to express my deepest gratitude to my supervisors, Prof. Avirup Dasgupta and Prof. Amit Agarwal, for their invaluable support and guidance throughout this work. 📝 This research focuses on the effects of NOx (NO and NO2) gas molecules on the electronics and optical characteristics of hexagonal Boron Arsenide (h-BAs) monolayers. 📝We observe that Hexagonal Boron Arsenide is a good fit for sensing applications. This inference is drawn by a thorough analysis of the absorption spectrum (α), dielectric constant (ϵ1, ϵ2), band structure, charge transfer (QT), total density of states (TDOS), and adsorption energy (Eads) presented in this study. Thanks to all the co-authors NEHA MISHRA and Prof. Santosh Kumar. Link:- https://lnkd.in/gsKH7FmW DiRac Lab ECE Department IIT Roorkee Indian Institute of Technology, Roorkee IEEE SENSORS #2D #sensors #optoelectronics #DFT #abinitio

Did you know? Carbon Rivers manufactures pristine graphene (PG) that is inert, defect free, and semi-transparent for photovoltaic cells and sensors. This advanced graphene has a large surface area which allows for very fast transmission and detection of information in a sensor. In addition, the mechanical properties of this graphene have the ability to promote flexible sensors under high stress strain and pressure. As a result, the applications are endless for many global industries, including biomedical, agricultural, manufacturing, food packaging, and aerospace. Learn more about Carbon Rivers advanced pristine graphene for structural and specialized foams, sensors, and other graphene-based materials at: www.carbonrivers.com. #CarbonRivers #CR #CRNano #pristinegraphene #PG #advancedgraphene #graphene #nanoflakes #sensors #graphenesensors #sensordevices #applications #fuelcells #energystorage #detection #responsetime #globalproducts #globalsolutions #advancedtechnologies #advancedsolutions #sustainablesolutions #sustainability #circulareconomy

I am excited to share with you that our research paper entitled "Forward-Based DC-DC Converter With Eliminated Leakage Inductance Problem" has been published as early access on IEEE Transactions on Industrial Electronics . The paper is co-authored by me, Oleksandr Husev, Hossein Afshari, Enrique Romero-Cadaval and Carlos Roncero-Clemente. The paper presents the novel forward-based converter for low-power solar applications which provides an efficient performance in a wide range of the input voltage with low component count. The proposed dc-dc converter has an advanced forward dc-dc converters with an additional clamped output capacitor, which eliminates the leakage inductance problem. The paper also shows the experimental prototype of the proposed forward-based dc-dc converter along with experimental results of the dc grid connection system. This research was executed in frames of the postdoctoral Estonia Research Grant (financed by ETAG - Estonian Research Council) PUTJD1209. The paper is available here: https://lnkd.in/dxx-WNfn.

DAY 34 : PERC Solar Cells: The Future of High-Efficiency Solar Technology ☀️ The PERC (Passivated Emitter and Rear Cell) solar cell is rapidly becoming the industry standard due to its enhanced efficiency and innovative technology. 🏭 Key innovations that make PERC cells a game-changer include: 🔹 Dielectric Rear Passivation: The introduction of an aluminum oxide layer, developed by Eindhoven University of Technology and IMEC, provides superior passivation, improving the performance of p-type silicon cells. 🔹 Localized Contact Openings: Using high-powered lasers, local contacts are formed efficiently during high-volume manufacturing. 🔹 Simplified Local Doping : Aluminum alloying, replacing boron diffusion, simplifies the process and ensures better localized contacts. 🔹 LID Elimination: The industry’s shift to gallium doping has negated the need for additional steps to mitigate Light-Induced Degradation (LID), ensuring the long-term stability of solar cells. With these advancements, the PERC solar cell is poised to dominate the industry in the coming years, offering higher efficiency and cost-effective manufacturing solutions. 🌞 #SolarEnergy #PERC #RenewableEnergy #SolarTechnology #Efficiency #Sustainability Bibhudatta Mishra

♻️🌍 Thermally activated delayed fluorescence (TADF) materials based on transition metal complexes are gaining attention for their technological potential. These materials are used in optoelectronics such as #OLEDs and #LECs, as well as in photocatalysis, sensing, and X-ray scintillators. Earth-abundant metals are preferred over rarer ones, reducing cost and toxicity without compromising performance. A review by Cluster Postdoctoral Researcher Valentina Ferraro, PI Stefan Braese, as well as Claudia Bizzarri highlights the use of these metals in #TADF materials and shows that they can compete with expensive complexes. Although these complexes achieve up to 100% internal quantum efficiency (IQE), they are expensive and cause environmental risks due to their rarity and disposal issues. In contrast, earth-abundant metals offer efficient emission and broad applications, making them a promising alternative for sustainable lighting and display technologies. They improve production costs, device lifetime and operational stability while achieving high quantum efficiency. This makes them ideal for the development of next-generation environmentally friendly light sources. In addition, the adaptability of #TMCs allows for different emission wavelengths covering the entire visible spectrum and supports both neutral and charged complexes for various applications. By focusing on the TADF properties of earth-abundant metals, it could lead to the design of new materials and architectures for efficient and stable OLEDs and LECs, thereby advancing environmentally friendly lighting and display technologies. ♻️🌱 👉https://lnkd.in/eRQJE7AR #paper #Sustainability #Innovation #GreenTech #MaterialsScience #Lighting #DisplayTech

Researchers led by Ankur Gupta at the University of Colorado Boulder have discovered how tiny charged particles, known as ions, move within a complex network of minuscule pores. This breakthrough, highlighted by Gupta, an assistant professor of chemical and biological engineering, could pave the way for the development of more efficient energy storage devices, such as supercapacitors. While various chemical engineering techniques are employed to analyze flow within porous materials like oil reservoirs and water filtration systems, their application in certain energy storage systems remains underexplored. Thus, the study introduces a model to predict electrolyte transport in complex networks of slender pores. The framework accelerates numerical computations by six orders of magnitude without compromising accuracy. This model is then used to investigate the influence of connections and pore size distribution on the charging time scale of electrical double layers and to predict structure-property relationships. The discovery is important not just for storing energy in vehicles and electronic devices but also for power grids. In these grids, where energy demand changes, efficient storage is needed to prevent waste during low-demand times and ensure quick supply during high-demand times. #energy #storage #efficiency #chemistry #supercapacitors #discovery https://lnkd.in/gtzPQADD

🌟 Exploring the Main Characteristics of Nanocrystalline Soft Magnetic Materials! #NanoMaterials 🧲 Superior Magnetic Properties Nanocrystalline soft magnetic materials are renowned for their exceptional magnetic properties. Despite their tiny size, these materials exhibit high magnetic permeability and low coercivity. This makes them ideal for applications where efficient energy conversion and minimal energy loss are crucial, such as in transformers and inductors. 🔬 Microstructure Advantages The microstructure of nanocrystalline materials, characterized by fine-grained crystals with grain sizes in the nanometer range, contributes significantly to their magnetic behavior. This structure allows for reduced eddy current losses and improved magnetic saturation compared to conventional magnetic materials. ⚙️ High Frequency Applications Due to their low magnetic losses and excellent high-frequency properties, nanocrystalline soft magnetic materials are extensively used in the telecommunications, electronics, and power electronics industries. They enable the development of compact and efficient devices for high-frequency applications, including magnetic cores in power supplies and electromagnetic shielding materials. 🌐 Environmental and Efficiency Benefits Using nanocrystalline soft magnetic materials can lead to energy savings and reduced environmental impact. Their high efficiency in energy conversion and transmission contributes to sustainable development goals by lowering overall power consumption and greenhouse gas emissions. 🎯 Cutting-Edge Research and Development Ongoing research and development in nanocrystalline materials focus on enhancing their performance, durability, and cost-effectiveness. Innovations in material synthesis and processing techniques continue to expand the range of applications and improve the overall performance of these materials. #SoftMagneticMaterials #Nanotechnology #AdvancedMaterials