Articles tagged with Perovskites
Researchers from EPFL have solved the puzzle of negative capacitance in perovskite solar cells by identifying a slow modification of current passing through contact, regulated by mobile ionic charge. This discovery sheds light on interaction between photovoltaic effect and ionic conductivity.
Scientists have created high-performance perovskite light-emitting diodes by rational molecular passivation, achieving a record-high 21.6% external quantum efficiency. The discovery overcomes defects in perovskites, allowing for efficient emission of near-infrared light.
Researchers at Waseda University have finally cracked the code on magnetism-driven negative thermal expansion (NTE), a phenomenon that can make materials less heat-sensitive. The study reveals that antiferromagnets with competing direct and indirect exchange paths are potential candidates for exhibiting NTE.
Researchers found that perovskite solar cells are stable up to 300 Gy of γ-radiation but suffer a rapid drop in efficiency with further increases in dose. The study aims to find more stable materials, which could make perovskite solar cells suitable for use in space
University of Groningen scientists have successfully produced high-quality solar cells using a novel 'doctor-blade' technique. The technique enables the production of large-scale, stable and efficient perovskite solar cells with improved photoluminescence and stability.
Researchers at North Carolina State University have developed a microfluidic system that can synthesize perovskite quantum dots across the entire spectrum of visible light. The system drastically reduces manufacturing costs and allows for real-time process monitoring to ensure quality control, enabling mass production of high-quality QDs.
Researchers have created a new method to synthesize miniature light sources using optically active halide perovskites. The process produces millions of nanolasers in a few minutes and offers good control over synthesis, making it suitable for industrial adaptation.
Researchers tested large-area perovskite solar cells in near space at an altitude of 35 km, demonstrating their ability to retain power conversion efficiency despite extreme conditions. The study found that a device based on FA0.81MA0.10Cs0.04PbI2.55Br0.40 retained 95.19% of its initial efficiency.
Researchers at Rutgers University have developed a new way to control the light emitted by hybrid crystal semiconductors, which could lead to more efficient solar cells and other electronic devices. By adjusting voltage applied to an electrode, they can increase the intensity of light emitted up to 100 times.
A team of researchers from Kanazawa University has made a breakthrough in improving the efficiency of metal halide perovskite-type solar cells by layering different mineral forms of titanium oxide. The new approach, which combines anatase and brookite layers, enhances electron transport and reduces recombination, leading to increased s...
A team of engineers found that certain defects in lead-halide perovskite semiconductors can improve their performance, increasing efficiency and stability. The discoveries could pave the way for the development of more efficient and environmentally friendly solar cells and LEDs.
Researchers at CityU developed an efficient fabrication method to create smooth perovskite films with enhanced performance and stability. This led to the production of highly efficient and stable green LEDs with a record operational lifetime.
A team of Florida State University physicists has discovered a way to stabilize the color of light emitted from halide perovskites, a promising class of materials for optoelectronic technologies. The research, published in Nature Communications, uses a unique nanostructure to turn unstable materials into stable ones.
Researchers have discovered a 'sweet spot' where adding certain additives enhances perovskite solar cell performance, but beyond that point, further additions degrade it. The findings provide clues for improving the material's efficiency and longevity, which currently lags behind conventional silicon cells.
Perovskite-based solar cells have shown promise in recent years due to their simplicity, flexibility, and energy efficiency approaching those of traditional silicon-based cells. Researchers at Georgia Tech, UC San Diego, and MIT have reported new findings that could lead to devices with improved performance and longer lifetimes.
Researchers at UNIST have developed a new generation of solar cells using lead-free perovskites, showcasing enhanced efficiency and stability. The study demonstrates that the surface state of Cs2SnI6 is highly redox active, facilitating charge transfer through it.
Researchers developed new materials to adjust transport layer properties, suppressing recombination and enhancing charge extraction. The study showed that permittivity and doping density of transport layers significantly impact PSCs' performance.
Physicists at the University of Utah have built two devices using perovskite to demonstrate its potential in spintronics. The materials' properties bring the dream of a spintronic transistor one step closer to reality.
Researchers from Chinese Academy of Sciences improve PSCs by removing van der Waals gaps in Ruddlesden-Popper phase 2D layered perovskites. The newly developed materials exhibit outstanding stability under harsh testing conditions.
Scientists developed a technique to integrate single-crystal hybrid perovskites into electronics, enabling flexible devices with reduced manufacturing costs. The advance opens new research avenues for applications in solar cells, LEDs, and photodetectors.
Researchers from Kaunas University of Technology (KTU) and Helmholtz Zentrum Berlin (HZB) developed a novel approach to form selective contact layers in perovskite solar cells using self-assembling monolayers. This method achieves extremely low material consumption and high efficiency, outperforming traditional methods.
Researchers have developed a novel 3D imaging technique called COBRA that visualizes the atomic and electron density structure of complex perovskite crystal structures. This breakthrough enables the study of materials with unique properties, such as ferroelectricity and superconductivity.
Researchers have created a single material that produces white light with high efficiency, potentially replacing current phosphors and saving energy. The new material combines a lead-free double perovskite with sodium, emitting stable and efficient warm-white light.
Researchers have developed a new approach to improve the efficiency of perovskite-silicon tandem solar cells by using textures and a polymer light management foil. This design achieved an efficiency of 25.5%, outperforming previous records, and has the potential to reach up to 32.5% with further improvements.
Researchers at Martin Luther University Halle-Wittenberg develop a method to produce stable perovskite layers, which could lead to high-performance solar cells. The approach uses an industry-wide process to control layer growth, resulting in homogenous and controlled crystals that can withstand elevated temperatures.
Perovskite LEDs have achieved close to 100% internal luminescence efficiency, opening up applications in displays, lighting, and communications. The devices outperform conventional OLEDs in terms of light-emission efficiency due to a composite layer of perovskites with an insulating polymer.
Researchers have developed inorganic perovskite-based photodetectors that transfer both text and music, offering a promising material for future rapid optical communication. The new materials have rapid response times, are simple to manufacture, and are extremely stable.
A new catalyst has been developed to improve Solid Oxide Fuel Cell (SOFC) performance by forming a self-assembled alloy at the surface. The catalyst was tested using methane gas directly, operating stably for over 500 hours with four times higher reaction efficiency than previous catalysts.
Researchers at Osaka University have discovered carrier multiplication in certain perovskites, increasing efficiency up to 44% compared to traditional solar cells. This breakthrough has significant implications for the development of more efficient photodetectors and solar cells.
Perovskite nanoparticles are capable of emitting different colors depending on the internal halogen element. Researchers at UNIST developed a simple method to replace certain elements via solution process, allowing for the creation of red, blue, and green LEDs with high luminous efficiency.
Swansea University researchers have developed a perovskite solar module six times bigger than the previous largest, with efficiencies of up to 6.3% PCE and 11% PCE at low light levels. The technology uses simple and low-cost printing techniques, paving the way for industrial production.
Scientists at OIST have developed a method to fabricate low-cost high-efficiency perovskite solar cells, boasting an efficiency comparable to crystalline silicon cells. The technique uses a gas-solid reaction-based method to produce uniform panels with improved stability and production costs.
Researchers at Penn State discover unique properties of halide perovskites that enable efficient conversion of sunlight into electricity, guiding the development of next-generation solar cells. The study's findings provide insights into how to improve the performance and stability of these materials.
FAU researchers find that incoming light causes electrons to rotate, influencing current flow and improving the efficiency of perovskite crystals. Heating perovskites to room temperature reveals a link between electron spin and current flow.
Scientists at ITMO University have developed a new material using silicon nanoparticles to improve perovskite solar cells' efficiency. The nanoparticles trap light of various wavelengths near the cell's active layer, maintaining stability and increasing absorption. This breakthrough could lead to more efficient and stable solar cells.
Scientists have identified key defects in perovskite solar cells that limit their efficiency. The most harmful defects are found at the interfaces between the perovskite layer and charge transport layers, leading to recombination of charge carriers and energy losses.
Scientists at the University of Washington have developed a method to improve the performance of perovskite solar cells by surface passivation, which significantly boosts their efficiency. This breakthrough could lead to thinner and more flexible solar cells with higher power conversion efficiency.
Scientists at Lomonosov MSU developed a new method to produce high-quality perovskite films from gamma-butyrolactone, surpassing previous solvents and achieving an efficiency of 23.2% for thin-film solar cells.
Researchers at Tokyo Institute of Technology have developed a ruthenium-based perovskite catalyst that exhibits high performance even at low temperatures and is recyclable. The new catalyst overcomes classic limitations, including the need for additives and high reaction temperatures.
Researchers have developed a family of metal-free ferroelectric perovskites offering non-toxic and mechanically flexible properties for future soft robotic and biomedical devices. One organic compound exhibits ferroelectric traits similar to inorganic BTO, enabling environmentally friendly applications.
The University of Surrey's Advanced Technology Institute has created a new technique to reduce energy loss in perovskite solar cells, increasing voltage and efficiency. The Solution-Process Secondary growth (SSG) method achieved a PCE of 20.9%, the highest certified for inverted cells.
Scientists have developed a new method to grow organic-inorganic hybrid perovskite nanocrystals on metal sulfide nanosheets using a wet-chemical process, enabling scalable production of solution-processible heterostructures. This approach improves light absorption and energy transfer in optoelectronic devices.
A new scalable means of applying an electron transport layer in perovskite cells has been developed, resulting in a 30 percent efficiency gain. This breakthrough could make perovskite solar cells more commercially viable and pave the way for record-breaking p-i-n perovskite solar cells.
Researchers have discovered a new class of materials that can harness sunlight to split water into hydrogen and oxygen. Cs2BiAgCl6 and Cs2BiAgBr6 are promising photocatalytic materials due to their ability to absorb visible light and generate sufficient energy to split water.
Recent improvements in perovskite alternatives are moving tandem devices closer to market with efficiencies similar to commercial silicon modules. Researchers have achieved lab device efficiencies up to 26.4 percent by tinkering with material composition and encapsulating cells in protective coatings.
Research teams have developed an economically competitive solution to create solar cells that combine the benefits of silicon and perovskite materials. The new technology achieves a record efficiency of 25.2% while maintaining compatibility with existing industrial expertise.
Researchers at Rice University and Los Alamos National Laboratory developed a scale to measure exciton binding energy in perovskite quantum wells, enabling the design of efficient optoelectronic devices. This breakthrough could impact solar cells, LEDs, and other technologies.
A KAIST research team has developed a novel perovskite material, Cs2Au2I6, which exhibits high efficiency and stability compared to conventional organic-inorganic hybrid perovskites. The new material is expected to overcome the limitations of previous perovskite materials, including toxicity issues.
Researchers have developed a facile wet-chemical method to directly grow organic-inorganic hybrid perovskite nanocrystals on dispersible MoS2 nanosheets. This enables the scalable production of solution-processible heterostructures, which exhibit improved light absorption and energy transfer due to their epitaxial interface. The use of...
Scientists from Lobachevsky University study Aurivillius phases for potential non-volatile memory chips. They determine operating temperature ranges and structural features, finding that linear dimensions increase more evenly throughout the material during transition to paraelectric state.
Scientists at OIST have developed stable and efficient perovskite solar cells that could revolutionize the solar industry. The new material is made of inorganic components, making it more heat-stable than previous versions.
Researchers used neutron scattering to study the microscopic structure and optoelectronic properties of hybrid perovskite materials. The study found that hydrogen bonding plays a key role in the material's performance, enabling manufacturers to design solar cells with increased efficiency.
Researchers at NREL have made progress in scaling up perovskite solar cell production, but issues persist, including the non-uniform coating of chemicals and inactive zones between cells. To address these challenges, scientists are exploring various scalable deposition methods.
A joint research program aims to create a stable network of researchers working on perovskite semiconductors. The material has shown potential as a highly efficient and processable solar cell technology, with the goal of improving its defect tolerance.
Researchers at Linköping University have developed high-quality lead-free double perovskite films with long electron-hole diffusion length, a necessary property for efficient solar cells. The power conversion efficiency of these solar cells is still low, but the team has taken a major step towards increasing efficiency in the near future.
Researchers relax perovskite crystal to reduce strain and improve power conversion efficiency, achieving 20.5% efficiency with negligible degradation over 1,500 hours of operation.
Researchers have designed molecular perovskite-based energetic materials with improved explosive performances, including high detonation heat, velocity, and pressure. The new materials also exhibit increased thermal stability and low impact sensitivity, making them suitable for military devices and civil industry.
Researchers at the University of Cambridge have discovered a simple potassium solution that can boost the efficiency of next-generation solar cells by up to 21.5%. The addition of potassium iodide 'heals' defects and immobilises ion movement, making the material more stable and efficient at converting sunlight into electricity.
Researchers have discovered a diamond containing the fourth most abundant mineral in Earth, calcuim silicate perovskite, at the surface. This finding suggests that oceanic crust is recycled into the lower mantle, with potential implications for our understanding of Earth's core.
A new approach to making highly-efficient solar cells has been developed using a novel perovskite material. The researchers achieved a power conversion efficiency of 19.10% and demonstrated air-stability in their device, which could lead to more efficient solar energy applications.