Yue-Wen FANG on LinkedIn: Colossal Ferroelectric Photovoltaic Effect in Inequivalent… (2024)

Are you delving into the intricacies of scaling up #Perovskite Solar Cells? In our latest Fluxim´s Science Shorts video Dr. Antonio Cabas Vidani will help navigate you through the challenges utilizing the advanced simulation software, Laoss. 🌞👇 Insights You'll Garner:The ideology of monolithic module design for solar cells.The repercussion of electrical resistance on solar cell efficiency.The function of interconnection gaps in solar cell design.Proficiency in employing Laoss simulation software for augmenting solar cell performance.The effect of Transparent Conductive Oxide (TCO) sheet resistance on Fill Factor (FF).https://lnkd.in/efrf-KK4Swansea

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It's giving me immense pleasure to share our new article published in ‘ACS Applied Energy Materials'; entitled as "CuBiS2 Ternary Quantum Dots: Tuning the Deposition Technique for Enhanced Photovoltaic Performance"This research focuses on the generation of cleaner and more affordable energy using CuBiS2 photoabsorbers in solar cells. One major obstacle impeding advancement of cell efficiency is the low quantum dot (QD) loading volume. The degree of QDs loaded onto the surfaces of the TiO2 has an impact on the device’s capacity to capture light and the interfacial charge recombination, and it controls the performance of QD solar cells. The cells are made using the SILAR process, making the device protocol extremely feasible, practically robust, and reliable. A detailed investigation on material characteristics as well as deposition methods paved the way for the highest PCE (power conversion efficiency) obtained for CuBiS2 QDs so far. The importance of Cu compounds (CuBiS2) in tuning the PCE is also demonstrated. Moreover, a series of inexpensive inorganic and solid-state hole transport materials are investigated to address the issues with liquid electrolyte in these devices. Charge carrier dynamics across the interface between the photoabsorber and the hole transport layer are studied in detail using electron impedance spectroscopy. An investigation on the relationships between processing, structure, properties, and performances allowed a precise analysis of the device.

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Shaded cells of a PV module operate in reverse bias. This damages the cells. I thought perovskite had no chance against it.At large reverse bias, the cell reaches the breakdown voltage. The device becomes conductive. But in the opposite polarity than the normal operating conditions. Surpassing the breakdown voltage damages the device.Perovskites have a small breakdown voltage. Just a few volts. Silicon solar cells have a very large breakdown voltage. Up to -20V. They are more resilient against the reverse bias caused by shading.Connect perovskite and silicon devices in series - 2-terminal tandem configuration - and the silicon subcell protects the perovskite solar cell against reverse bias. The Si solar cell will undergo most of the reverse bias. How so? At large reverse bias, perovskite is more conductive - it has lower resistance - than silicon, due to the small breakdown voltage. A device with low resistance will have a small voltage drop. That's Ohm's law. It is challenging to measure the voltage applied on the single subcells. Electrical simulations support the experimental observation. Very nice study!#perovskite #stability #reversebias

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New paper about reverse bias stability of perovskite/silicon tandems with Barry Rand and colleagues at Princeton University, just published in Joule. Reverse biasing is a situation that may happen when unintentionally shading any PV module, for instance due to a leaf.The strong resilience we find for monolithic perovskite/silicon tandems, thanks to the silicon bottom cell which protects the perovskite top cell, gives this technology a further boost as the frontrunner towards practical applications of perovskite PV.

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Just published in "ACS Applied Energy Materials" journal our latest study: https://lnkd.in/ddpaZuitThe efficient conversion of both light and heat deriving from the absorption of concentrated sunlight into electricity is a recently introduced objective within the #solar #energy field.Photon-enhanced thermionic energy converters (PETECs) accomplish this aim by combining both #photovoltaic and thermionic mechanisms to maximize the energy available for the power conversion, thus overcoming the respective limitations of both types of technologies (i.e., Schockley−Queisser and Carnot limit, respectively).In a PETEC, a #semiconductor cathode is illuminated with concentrated #sunlight generating photoexcited electrons in the conduction band, which thermalize and are subsequently thermionically emitted from its surface. PETECs can achieve higher conversion efficiencies than traditional photovoltaic solar cells through the exploitation of the thermalization energy which increases the cathodic temperature.By correlating Raman measurements, Kelvin Probe Force Microscopy (KPFM) maps, and electrical characterization under concentrated solar radiation, our paper shows that heterostructures made of Chemical Vapor Deposition (#CVD) #nanocrystalline #diamond (NCD) films grown on p-type Si(100) substrates act as photon-enhanced thermionic emitter (PETE) cathodes with an electron affinity as low as ∼0.4 eV. Moreover, our experimental findings indicate that sp²-carbon rich NCD grain boundaries play an extremely important role in the emission of electrons, increasing the probability of electronic transfer toward the emitting surface.#sustainability#materials#research#chemistry#MaterialScience #Innovation#solar_energy

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Happy to share that our review article " The Prospective Applications of arising Nanostructured Dielectric Materials in Storage of Energy: A Comprehensive Review" published in Micro and NanoSystem, Bentham Science.

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"Exciting news to share! Today, we celebrated thesis presentation by Yaniv Dror, a talented master's student in our research group (Eran Edri). His research on close-spaced sublimation technique for the synthesis of BixSb2-XSe3 thin films for short wavelength infrared solar cells has bought us one step closer to harnessing solar energy more efficiently. His research has been published in the reputed Journal of materials chemistry C. The research article can be accessed through the following link for those interested. https://lnkd.in/dyuBhdzWBut that's not all—the journey continues for Yaniv. He will be joining the research team at Appollo Solar Power Company. I am sure that with his experience and passion for solar energy, he is poised to contribute significantly to innovation and advancement in the field.Witnessing the growth and success of young researchers like Yaniv is always fulfilling. Congratulations once again, Yaniv, on these well-deserved accomplishments! Wishing you continued success and fulfillment in your future endeavors. #SolarEnergy #Research #Publication #CareerMilestone #Congratulations"

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The theoretical results obtained in my previous studies highly motivated me to carry outa systematic computational investigationusing this methodologyontheessentialfundamentalparameters for solar energy conversionof a series of large, medium and smallselected (covalent, binary and ternary)materials widely utilised in fuel cells, photocatalysis, optoelectronics, photovoltaics and dye-sensitized solar devices. Thecomputed band gap energy values revealed high accuracy in reproducing the experimental datathanks toprecise electronic structure calculations, confirming once again the good reliability of this methodology, as shown in this Figure (ref 1).#references(1)Moussab Harb and co-worker, Toward the Design of New Suitable Materials for Solar Water Splitting Using Density Functional Theory. ACS Omega2018,3, 18117−18123.

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Congratulations on this study comparing the reverse-bias stability of perovskite single-junction, silicon single-junction, and monolithic perovskite/silicon #tandem solar cells. Perovskites enable high-efficiency photovoltaics but degrade under reverse bias, problematic for module integration where shading can induce reverse bias. The team from 美國普林斯頓大學 and KAUST (King Abdullah University of Science and Technology) shows monolithic perovskite/silicon tandems exhibit superior reverse-bias resilience versus perovskite single-junctions in biasing tests and shading tests. The silicon subcell drops over 95% of the reverse voltage due to its low reverse current, protecting the perovskite subcell from degradation. In summary, the silicon subcell in monolithic perovskite/silicon tandems provides highly effective reverse-bias protection for the perovskite subcell, enabling greatly improved stability against shading compared to #perovskite single-junction solar cells. This highlights a crucial advantage of perovskite/silicon tandems for commercialization.

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Fantastic to see this published! Lesly did an amazing study on the interaction between plasmonic metal nanoparticles and 2D metal oxides using EELS. #ozchem #nanotechnology #chemistry #nanoscience

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