Articles tagged with Perovskites
Researchers have solved the mystery of chlorine's role in perovskite solar cells by imaging atoms at the surface. The team found that chlorine is incorporated into the material through grain boundaries, increasing stability and efficiency. An optimal concentration of chlorine was discovered to deliver high stability.
A study from KAUST found that interface and bandgap engineering can significantly slow down the relaxation of 'hot' electrons in semiconductors, increasing their lifetimes. This innovation has potential applications in solar cells, which could improve efficiency by reducing heat loss.
Researchers have developed a stable perovskite nanocrystal material for LEDs, enabling bright and long-lasting light sources. The new material is made using a metal-organic framework structure, which keeps the nanocrystals separate and prevents degradation.
Researchers developed a new memory device that uses perovskite to store and visually transmit data, achieving parallel and synchronous reading of data through electrical and optical methods. The device has the potential for numerous applications in next-generation technologies.
Researchers have developed a new structure and materials for tandem solar cells, enabling more light to be captured and energy converted effectively. The n-i-p configuration achieved a significant improvement in power-conversion efficiency, exceeding 27%, surpassing previous best values.
Researchers at HZB developed a method to quantify charge extraction at buried interfaces in perovskite solar cells. Time-resolved surface photovoltage technique facilitates design of ideal charge-selective contacts and improves efficiency.
KAUST researchers have developed a multifunctional molecule, phenformin hydrochloride, to plug various atomic-scale defects in perovskite solar materials. This innovation significantly improves the longevity and electrical output of perovskite solar cells, with boosted power conversion efficiencies reaching up to 20.5%.
Researchers pair metal halide perovskites with conventional silicon to create a more powerful solar cell, overcoming the 26% practical efficiency limit. The technology has the potential to rapidly scale up solar energy production and help meet ambitious climate change targets.
Researchers found a solution to overcome ion interference in perovskite transistors, enabling room-temperature operation. The breakthrough uses ferroelectric materials to mitigate ion transport, promising applications in low-cost electronics.
Researchers found that tin fluoride additive traps oxidized tin in solution, reducing instability. Fluoride also improves colloid stability, leading to more homogeneous crystal growth.
Researchers provide a systematic overview of printing technologies for scaling up perovskite solar cells, highlighting the key role of ink engineering in achieving high-quality thin films. The study also discusses the technical feasibility of printing additional layers and presents progress on roll-to-roll printing and stability issues.
Researchers have developed a new method to capture and recycle lead from perovskite solar cells, addressing the environmental and health hazards associated with their use. The transparent phosphate salt solution prevents lead ions from leaching into the soil, rendering perovskite devices safer for large-scale commercialization.
University of Arizona engineers harness the power of perovskites to create ultra-thin and flexible solar cells with high efficiency rates. The new process, called RAPID, aims to reduce grain boundaries by 90% and improve stability, leading to significant impacts on perovskite production.
The Perovskite Photovoltaic Accelerator for Commercializing Technologies Center aims to overcome challenges in perovskite-based photovoltaic technologies. The center will test at least 30 perovskite modules outside and eventually expand performance testing to 50 kilowatts.
High-quality nickel oxide films for perovskite solar cells can be created at low temperatures without expensive thermal annealing, enabling large-scale, low-cost manufacturing. The new process achieved power-conversion efficiencies of 17.9% and demonstrated stability over extensive testing.
A new recycling strategy for perovskite solar panels has been developed, which could reduce the carbon footprint of these panels by up to 72.6%. The recycling process could also lower the primary energy consumption of perovskite solar cells.
Researchers at Pohang University of Science & Technology developed halide perovskite-based memory with fast switching speed, overcoming slow speed limitations. The new technology uses lead-free materials and offers a step towards practical applications.
Researchers at OIST Graduate University have developed a new method to synthesize crystalline powder necessary for perovskites, resulting in higher quality and stable solar cells. The newly created perovskite-based solar cells achieved conversion efficiencies of over 23% and lifespan of more than 2000 hours.
Rice University engineers have developed a method to grow remarkably uniform 2D perovskite crystals using microscopic seeds. This breakthrough addresses production issues and enables the creation of highly efficient photovoltaic devices with stable performance.
Researchers from North Carolina State University have discovered that a commonly studied perovskite can superfluoresce at practical temperatures and timescales, indicating this characteristic may be widespread in the class of materials. This phenomenon could prove useful for quantum computing applications.
Researchers found a correlation between intragrain planar defects and reduced solar cell performance in perovskite materials. Tuning the chemical composition of these films controlled the presence of defects, leading to improved solar cell efficiency.
The study reveals an intricate connection between composition, light-induced lattice dynamics, and stability of the materials. It also found that energy transfer between vibrational modes in iodine-based perovskite nanocrystals is more pronounced than in bromine-based ones.
Researchers develop new methodology to study lead halide perovskites' photophysics, revealing the limitations of existing theories. The method provides a complete representation of the material's photophysical processes, allowing for the examination of theory validity and exploration of new explanations.
Researchers at NYU Tandon have developed a method to speed up the doping process of perovskite solar cells using carbon dioxide, increasing efficiency by 100 times. This process also captures CO2, making it a potential solution for reducing greenhouse gas emissions in commercial solar cell production.
Researchers have developed semitransparent perovskite solar cells with high efficiency, enabling the creation of tandem devices that boost performance. The breakthrough could lead to transparent solar cells on windows, generating electricity from sunlight.
A team of researchers has developed a new method to combine perovskite nanocubes with spherical nanoparticles to form structured, multi-part nanocrystals. These materials display fundamental new properties such as superfluorescence, which can be harnessed for practical uses like ultrabright quantum light sources.
Researchers at McGill University have gained new insight into the workings of perovskites, a semiconductor material that shows great promise for making high-efficiency, low-cost solar cells. They discovered a phenomenon known as quantum confinement occurs within bulk perovskite crystals, leading to the formation of 'quantum drops', whi...
Researchers at the ARC Centre of Excellence in Exciton Science have discovered a 'sandwich' structure in 2D perovskite films used in solar cells. This layout encourages excitons to move from the central layer to both surfaces, helping to result in more efficient solar energy generation. Prototype devices have demonstrated 13% efficiency.
Scientists at Argonne National Laboratory discovered that liquid-like motion in perovskites could prevent recombination, increasing the efficiency of solar cells. The study reveals a two-dimensional pattern of molecular oscillations, which helps to explain the material's promising photovoltaic properties.
Scientists have identified a mechanism that causes perovskite solar cells to degrade, but also found a potential solution by selecting a crucial layer within the material. This new approach aims to increase stability and efficiency of next-generation solar cells.
A combined molecular dynamics and experimental study reveals a two-step process that enables the formation of phase-pure α-FAPbI3 at lower temperatures. The researchers used metadynamics to simulate the transformation from PbI2 to perovskite, which was confirmed by in situ x-ray and thin-film experiments.
A team from Brown University has made a significant breakthrough in improving the long-term reliability of perovskite solar cells by creating a molecular glue that strengthens key interfaces. The treatment increases cells' stability, reliability, and efficiency, setting the stage for widespread adoption of clean energy technology.
Scientists at KAUST have created a new absorber layer for perovskite solar cells using single crystals with a mixture of organic cations. This improvement increases the absorption range and enhances device performance, reaching an efficiency of 22.8 percent.
Scientists create a 2D/3D hybrid perovskite heterostructure crystal, achieving high polarization sensitivity in photodetection. The device surpasses reported perovskite-based devices and is competitive with conventional inorganic heterostructure-based photodetectors.
Researchers at the University of California - Santa Barbara have identified a major cause of limitations to efficiency in hybrid perovskite solar cells. A study found that missing hydrogen atoms in the organic molecules can cause massive efficiency losses due to unwanted energy dissipation, resulting in lower photovoltaic performance.
Researchers at Argonne National Laboratory found that tuning the surface of lanthanum cobalt oxide perovskites with strontium enhances their activity and stability for the oxygen evolution reaction. This breakthrough could lead to more efficient and cost-effective methods for producing hydrogen fuel.
Researchers at Queensland University of Technology have developed carbon dots from human hair waste to enhance perovskite solar cell performance. The carbon nanodots form a wave-like layer surrounding the perovskite crystals, protecting them from environmental factors and improving power conversion efficiency.
Researchers have developed a novel method to improve photovoltaic performance in perovskite solar cells by modifying grain boundaries with 2D materials. The modifications lead to enhanced carrier mobility and stability, even under certain conditions where grain boundaries are favorable for device performance.
Kanazawa University researchers have fabricated a highly efficient perovskite solar cell with nearly the energy conversion efficiency of commercial silicon-based solar cells. The development has the potential to increase the competitiveness of solar cells as a sustainable energy source.
Researchers found two distinct magnetic phase transitions in PbFeO3, including a continuous spin reorientation at 418K and a weak ferromagnetic transition at 600K, which could enable the development of faster and more efficient spintronic devices.
The study reveals that fundamental processes during perovskite film formation strongly impact reproducibility, and optimizing the antisolvent step can significantly widen the processibility window of perovskite photovoltaic devices.
Quasi-2D perovskites offer self-assembled multi-quantum-well structures and large exciton binding energy, enabling high carrier density and efficient radiative recombination. Researchers are exploring composition and structure engineering to achieve pure red and blue LEDs with improved performance.
A new fabrication method for stable perovskite solar cells has been developed, enabling easy production, low cost and high performance. The sulfolane-additive process extends the processing window, forming highly crystalline layers over a large area with extended operational lifetimes.
Researchers at NREL and University of Utah developed a spin-polarized LED using metal-halide perovskites, enabling room-temperature operation without magnets. This breakthrough has broad implications for applications like quantum computing and bioencoding.
Halide perovskites' twisting motion creates desirable renewable energy properties, helping materials scientists tailor chemical recipes for environmentally friendly applications. The study's findings apply to a wide range of halide perovskites, including hybrid organic-inorganic and lead-free variants.
Scientists from KIT's Institute of Microstructure Technology and Light Technology Institute have developed a new model to calculate photoluminescence quantum efficiency of perovskite films. The results reveal that the actual efficiency is significantly lower than previously estimated, with an estimated 78% compared to predicted 90%. Th...
A new class of nanomaterials made from perovskite have improved the efficiency of quantum dots, allowing for brighter displays and more efficient electronics. By analyzing the interactions between bright and dark states, researchers were able to verify energy alignment and make discoveries regarding electron behavior.
The research team used laser spectroscopy to define the physics of trapped carriers in organic metal halide perovskite films. By analyzing the photocurrent, they identified defects that reduce efficiency, ultimately leading to increased performance and lower costs for solar cells and other devices.
Researchers developed a new type of LED that utilizes spintronics to produce circularly polarized light emission. The technology uses chiral molecules to self-assemble into standing arrays, which actively spin-polarize injected electrons and emit circularly polarized light.
Researchers at the University of Surrey have developed a new analysis of 2D perovskites, which could improve the stability of next-generation solar cells and LEDs. By combining lead with tin, they were able to reduce toxic lead quantities and tune key properties, leading to enhanced performance in photovoltaics and light-emitting diodes.
A novel technique has been developed to explore the fine structure of barium titanate, a perovskite titanate that could potentially replace lead titanate in sensors. The study found similar orbital hybridization between titanium and oxygen, as well as between barium and titanium electrons, contributing to polarization reversal.
Researchers at KAUST have developed a new solar cell material combination that surpasses the performance of traditional silicon-based panels. By optimizing perovskite materials and device architecture, they achieved efficiencies beyond commercial silicon solar cells.
Researchers at City University of Hong Kong have created a new type of LED using 2D perovskite materials, which can be processed at room temperature and offer improved efficiency. The team discovered that adding a simple organic molecule enhances the electro-luminescence performance of the material.
The study of Cs2PbI2Cl2 reveals a threefold increase in photoconductivity at 2 GPa, comparable to 3D halide perovskites. Pressure regulation modifies excitonic features, reducing exciton binding energy and facilitating carrier dissociation.
Materials scientists have created a method to incorporate diverse perovskite materials into silicon-based semiconductor platforms using microfluidic pumping technology. This innovation enables the creation of complex optoelectronic devices on a single chip, offering potential applications in fields like lab-on-a-chip technology.
The Helmholtz-Zentrum Berlin team has developed a scalable method for coating larger surfaces using slot-die coating. They found that the optimal amount of dimethyl sulfoxide (DMSO) in the material ink is critical for crystal growth, with too little or too much reducing performance.
Researchers have developed a novel method for producing highly efficient X-ray detectors using 3D aerosol jet-printing, enabling improved performance of medical imaging devices. The new detectors utilize perovskites and graphene, resulting in record sensitivity and a four-fold improvement over existing technology.
Researchers developed a method to suppress phase segregation in large perovskite single crystals, yielding state-of-the-art devices with long carrier lifetime and high charge mobility. The resulting photodetectors exhibited high responsivity, photoconductive gain, and fast response speed, paving the way for novel imaging applications.
Researchers at NUST MISIS developed a new structure for perovskite solar cells using MXenes, increasing power conversion efficiency to over 19%. The modified cells show superior performance and improved stabilized power output compared to reference devices.
Researchers at UCLA have discovered a new molecular component in perovskites that can enhance their electronic performance. The study, published in Science, shows that properly designed organic molecules can contribute to the materials' electronic properties, leading to improved efficiency in solar cells and LEDs.