Articles tagged with Perovskites
Researchers have discovered a phenomenon where certain oxides oscillate when exposed to water vapor, generating oxygen gas and exhibiting flexibility unlike expected. The exact frequency of the oscillations can be precisely tuned, which could have practical applications in battery materials and water-splitting devices.
Recent perovskite research by Ames Laboratory scientist Javier Vela reveals enhanced thermal and moisture stability, as well as tunable light absorption, in mixed-halide perovskites. This breakthrough may lead to more efficient solar cells and LEDs.
Scientists at NREL found that perovskites could have great potential for optoelectronic applications beyond photovoltaics, including in quantum computing. The discovery was made by accident while investigating excitons in perovskites and demonstrates the optical Stark effect's promise as an ultrafast optical switch.
Researchers at NREL and Shanghai Jiao Tong University develop a method to treat perovskite films with MABr solution, repairing defects and improving efficiency. The new approach boosts the efficiency of perovskite solar cells to up to 19% and demonstrates improved reproducibility.
University of Groningen scientists discovered that removing air from perovskite crystals can deactivate 'traps' that reduce solar cell efficiency, allowing for more efficient solar cells. Researchers also found that oxygen and water vapor can be used to create new gas sensors for detecting seal breaks in food packaging.
Researchers found that moisture in the air enhances perovskite solar cells' performance by redistributing a dopant, increasing electric properties. However, prolonged exposure to moisture can be detrimental.
Researchers have made significant breakthroughs in perovskite solar cells by developing a hydrophobic conducting polymer that improves efficiency and stability without additives. The new cells retain high performance over two months in humid conditions, paving the way for commercialization.
Researchers from the University of Houston have reported a critical step toward large-scale manufacture of better and less-expensive solar panels. They discovered how perovskite thin films change structure upon gentle heating, crucial for designing a manufacturing process that can consistently produce high-efficiency solar panels.
Researchers have developed a new type of two-dimensional layered perovskite with outstanding stability and more than triple the material's previous power conversion efficiency. The breakthrough involves flipping crystals during casting, eliminating a gap in electron flow that previously reduced efficiency.
Scientists at Berkeley Lab have discovered a possible secret to dramatically boosting the efficiency of perovskite solar cells, potentially increasing conversion rates up to 31 percent. The discovery involves exploiting the unique properties of facets on individual grains in the crystalline material.
Researchers discovered that charge carriers in perovskites are polarons, moving coherently as one unit. This finding could help progress perovskite research projects and large-scale applications.
Researchers at UC Santa Cruz developed a new capping strategy to stabilize perovskite nanocrystals, overcoming instability issues with organometal-halide materials. The approach uses unique branched ligands to control particle size and improve photoluminescence quantum yield.
Researchers at Northwestern University discovered that layered perovskite ferroelectrics can completely lose their polarization when subjected to too much strain. This unexpected finding opens up new avenues for developing more efficient logic devices and memory elements.
Researchers have developed perovskite solar cells with an average efficiency of 19.6% and a record-breaking aperture area of 1 cm2, overcoming scalability limitations. The new technique eliminates impurities and grain boundaries, resulting in highly oriented crystalline films.
EPFL researchers have achieved the highest performance ever measured for larger-size perovskite solar cells, reaching over 20% efficiency. This breakthrough could lead to increased efficiency in hybrid solar panels that combine perovskites with silicon, potentially exceeding 30% efficiency.
Researchers at MIT have discovered a process to remove defects in new solar cell materials using intense light, improving their efficiency and consistency. The technique, called photo-induced cleaning, uses illumination to migrate ions that sweep away most of the defects in the material.
Researchers design a perovskite nanoparticle that changes color when interacting with ions and small molecules during chemical reactions. This allows for qualitative monitoring of reactions with the naked eye and quantitative analysis with simple instrumentation.
Researchers at Los Alamos National Laboratory found that perovskite solar cells degrade due to accumulated charge carriers and self-heal when exposed to darkness. Temperature control can stabilize device performance by reducing degradation mechanisms.
Researchers at Brown University have developed a new method to convert one type of perovskite into another, improving thermal stability and light absorption. The technique uses gas-based methods to flip the chemical switch, preserving the microstructure and morphology of the material.
Researchers found that compression changes bandgaps, allowing scientists to tailor absorbed light wavelength and increase voltage. Pressure also significantly increases electronic conductivity of perovskites.
ORNL researchers have found a potential path to improve solar cell efficiency by understanding the competition among halogen atoms during perovskite synthesis. The study reveals that bromine, chlorine, and iodine ions facilitate growth but only iodine gets into the final crystal structure.
Researchers at Stanford University found that applying pressure can increase the voltages of perovskite solar cells and enhance their electronic conductivity. This discovery holds promise for advancing low-cost tandem solar cells.
Scientists have discovered that hybrid lead halide perovskites can recycle light, a finding that could lead to large gains in solar cell efficiency. This process creates a concentration effect inside the cell, enhancing energy efficiency and potentially reaching efficiencies well beyond current silicon-based cells.
Researchers used DFT to calculate electronic, elastic, and vibrational properties of BiAlO3. The study explores its crystal structure, space group R3c, and lattice parameter a = b = c = 5.338?A.
EPFL scientists have engineered a molecularly engineered hole-transporting material for perovskite solar cells, achieving competitive power-conversion efficiency of 20.2%. The new material is significantly cheaper to synthesize and purify than existing alternatives.
Researchers from Warsaw University of Technology develop a mechanochemical process to synthesize perovskites, which can be used in high-efficiency solar cells. The new method is environmentally friendly and produces higher-quality materials than traditional methods.
Researchers have developed a hybrid silicon/perovskite tandem solar cell with an optimum band gap of 1.75eV, achieving a significant increase in efficiency due to improved light absorption and stability. This breakthrough could lead to the development of high-efficiency solar modules with increased theoretical maximum efficiency.
Okinawa Institute of Science and Technology (OIST) researchers conduct the first atomic resolution study of organic-inorganic perovskites used in next generation solar cells. The study reveals positions and orientations of atoms and molecules, providing detailed information on structural defects.
Researchers added cesium to perovskite solar cells, increasing thermal and photostability while maintaining high efficiency. The modified cells showed a boost in efficiency when layered on top of silicon photovoltaics, potentially achieving over 25% efficiency.
Water molecules on the surface of perovskites exhibit unusual behavior, where they split into two parts but continue to interact through weak hydrogen bonds. This interaction causes the OH group to circle the hydrogen atom like a dancer spinning on a pole, a phenomenon predicted by theory and confirmed through experiments.
Researchers at EMPA have developed tandem solar cells that convert a larger portion of light energy into electricity, using polycrystalline thin films and semi-transparent perovskite film. The new process enables large area low-cost processing and flexible plastic or metal foils as substrates.
Scientists at NREL have discovered a way to increase the efficiency of perovskite solar cells by reducing energy lost to heat. By utilizing hot-carrier solar cells, the potential efficiency limit increases from 33% to 66%. Perovskites are a class of materials with various technological applications.
Researchers from Florida State University have created a new type of high-performing LED using organometal halide perovskites, which outshines traditional LEDs by about 25 times. The material is also quick and easy to produce, reducing production costs.
A new monolithic tandem solar cell has been developed, combining perovskite and silicon materials to achieve an efficiency of 18%, nearly 20% higher than individual cells. The device's design includes a protective layer and a textured wafer, which could further increase efficiency up to 30%.
Researchers have identified silver corrosion as a major issue in perovskite solar cells, which absorb light across almost all visible wavelengths and exceed 20% power conversion efficiency. A solution-based method using silver electrodes can reduce costs but may lead to short lifetimes.
Researchers at Brown University have developed a new fabrication method to attain better than 15-percent energy conversion efficiency from perovskite solar cells larger than one square centimeter area. The process, which involves growing ultra-smooth films of perovskite crystals, reduces defects and increases efficiency.
Researchers have developed a process to cover fragile perovskite layers with graphene, resulting in an ideal front contact. The graphene layer enhances transparency and reduces open-circuit voltage losses, increasing overall conversion efficiency.
Researchers successfully grew atomically thin 2D sheets of organic-inorganic hybrid perovskites from solution, exhibiting efficient photoluminescence, color-tunability, and unique structural relaxation. The ultrathin sheets have square-shaped geometry, high quality crystallinity, and large size, facilitating their integration into futu...
A team of physicists has discovered stable ferroelectricity in a few nanometers thick strontium titanate film, contradicting expected behavior. This finding could lead to new materials for nanotechnology devices.
Researchers at Case Western Reserve University have developed a system that directly charges lithium-ion batteries with solar cells, achieving an efficiency of 7.8%, the most efficient reported to date.
A Brown University-led team has received a $4 million grant to study perovskite solar cells, aiming to improve efficiency and scalability. The researchers will focus on understanding the basic science behind these solar cells, developing new technologies, and investigating lead-free compositions.
A new study by Northwestern University and the U.S. Department of Energy's Argonne National Laboratory found that perovskite solar modules have a significantly shorter energy payback time than existing options, with some models returning energy investment in just two to three months. The researchers also analyzed the environmental impa...
Researchers at the University of Toronto have successfully combined two promising solar cell materials, perovskite and colloidal quantum dots, to create a new platform for LED technology. The resulting hybrid crystal enables hyper-efficient lighting with minimal loss or capture by defects.
Researchers have found that chlorine is depleted from the surface of perovskite absorber layers during processing, while its concentration near the interface with a titanium dioxide layer is higher. This distribution could help mitigate recombination and provide a template for growing the film.
Scientists at OIST eliminated problematic pinholes in perovskite solar cells, significantly improving their lifetime and reducing thickness. The breakthrough enables more efficient energy conversion, with improved durability and potential cost-effectiveness.
Researchers have developed tandem photovoltaics that combine perovskite and silicon solar cells to achieve higher energy conversion efficiencies. This innovative design could give a boost to industrial solar cell efficiencies and provide a promising alternative to traditional silicon solar cells.
Researchers have developed a new tandem solar cell that combines two types of photovoltaic material to harvest a broader range of the sun's energy. The new cell achieves an efficiency of 13.7 percent, which could be improved to over 30 percent with low-cost modifications.
Researchers at the University of Utah have uncovered the secrets behind hybrid perovskite solar cell performance, enabling rapid testing using magnetic fields. The study confirms a new mechanism that explains the material's high efficiency, shedding light on its behavior and potential for optimization.
A new method for making perovskite solar cells has been developed by researchers at Brown University, which involves a room-temperature solvent bath to create perovskite crystals. The technique produces high-quality crystalline films with precise control over thickness across large areas.
Researchers at OIST discovered that growing Perovskite films in ambient air instead of a nitrogen atmosphere results in larger grain sizes, making solar cells more efficient. The study's findings could significantly reduce costs associated with climate control machinery.
High-performance solar cells with a combination of materials like perovskite and spiro-MeOTAD are plagued by tiny pinholes, allowing water and gases to degrade the material. Researchers at OIST Graduate University believe these minuscule openings could be key to understanding the degradation of perovskite, leading to potential solutions.
Researchers have developed a hot-casting technique to grow large-area perovskite crystals, offering promising routes for low-cost, clean energy solutions. The technique yields highly efficient and reproducible solar cells with efficiencies approaching 18%, surpassing previous challenges in the field.
Researchers grew large, pure perovskite crystals and studied how electrons move through the material as light is converted to electricity. The study identifies the bar for ultimate solar energy-harvesting potential of perovskites and shows that progress is slated to continue without slowing down.
Researchers at the University of Exeter have identified a new material, perovskite, that can efficiently generate photovoltaic energy in various atmospheric conditions. This breakthrough has the potential to significantly reduce the costs of solar energy production.
Researchers at Stanford University have developed a novel perovskite-silicon tandem device that dramatically improves the overall efficiency of conventional silicon solar cells. The device achieves an efficiency boost of nearly 50% with relatively low cost, making it a promising solution for the renewable energy sector.
A UNL researcher has received a $1.2 million grant to improve the efficiency of solar cells using perovskite technology, aiming for at least 30% efficiency. The project seeks to refine silicon-based cells by overlaying them with perovskite, taking advantage of the material's natural abundance and properties.
A system proposed by MIT researchers recycles materials from discarded car batteries to produce long-lasting solar panels, providing emissions-free power. The production process uses a compound called perovskite, which has achieved power-conversion efficiency of over 19 percent.
Researchers at the University of Notre Dame have discovered a new class of hybrid perovskites with exceptional performance in solid-state thin film solar cells. The materials demonstrate high light-to-electricity conversion efficiencies approaching 20% and are easy to process using coating and printing techniques.
A hybrid form of perovskite has been used to make high-brightness LEDs with a simple and scalable process, potentially replacing conventional methods. The results could provide a lot of value to the flat-panel display industry.
A team of scientists in China has developed a new type of perovskite solar cell that does not use a hole-transportation layer, showing high efficiency and stability. The innovation reduces production costs and paves the way for a cost-effective branch of development in this type of solar cell.