Articles tagged with Perovskites
Researchers at the University of Surrey have made a breakthrough in producing more efficient solar panels by focusing on the chemistry of perovskite materials. The new method, developed in collaboration with other institutions, increases efficiency and stabilizes energy deficiency over time.
Scientists at NREL have developed a tin-lead perovskite cell with a 25.5% efficiency, outperforming previous records by several hundred hours. The new cell uses additives to improve carrier lifetime and reduce defect density, leading to enhanced stability and voltage generation.
Researchers have discovered a way to create devices that mimic natural photosynthesis, producing fuels like hydrogen instead of sugars. The breakthrough uses bismuth oxyiodide, a non-toxic semiconductor material that can produce clean hydrogen from water over weeks.
Researchers anchored Mo2C nanoparticles onto MAPbI3 to enhance photocatalytic activity for hydrogen evolution. The composite exhibits superior performance, surpassing pristine MAPbI3 and Pt-deposited MAPbI3.
Researchers at NTU Singapore have developed a flexible and durable fabric that harnesses energy from human movements, providing a potential solution for wearable power sources. The fabric generates enough electricity to light up LEDs and charge capacitors, demonstrating its potential for use in smart textiles and wearable electronics.
Scientists discovered that tiny defects in perovskites, cheaper alternative materials for solar cells, also cause structural changes leading to degradation. By controlling the formation of these detrimental phases, researchers can improve performance and stability of devices, bringing them closer to commercialization.
Scientists at Seoul National University created highly efficient large-area perovskite light-emitting diodes with an external quantum efficiency of 22.5%. The breakthrough technology uses colloidal perovskite nanocrystals, overcoming previous limitations in uniformity and mass production.
A new method for creating key components of solar cells, X-ray detectors, and LEDs uses water to control the growth of phase-pure perovskite crystals. This approach allows for precise tuning of crystal structures at room temperature.
Researchers from KAUST have designed an all-inorganic halide-perovskite polymer-fiber-photodetector that can detect light in the green region (around 510 nm), enabling fast underwater optical communications. The system offers a 3dB bandwidth of 13.1 MHz, allowing data transmission speeds of up to 152.5 Mbit/s.
Researchers have developed a new protocol for testing perovskite solar cells, which are radiation-hard and durable enough for use in space. The study found that perovskites are more resistant to damage from radiation than previously thought, making them suitable for applications such as lunar installations and satellite missions.
Researchers have tested experimentally two common hypotheses about the transport properties in perovskites, eliminating them as possible explanations for superior charge transport. Measurements by Maryam Sajedi did not show a giant Rashba effect or a postulated increase in effective mass for CsPbBr3 and MAPbBr3 samples.
Scientists have successfully developed lead-free bismuth halide perovskites with broadband emission, overcoming toxicity and instability issues of traditional lead-based materials. The new material exhibits high efficiency and stability, paving the way for potential applications in artificial lighting and displays.
A research team revealed the mechanism of oxygen activation on Barium-containing perovskite materials. The study discovered that BaO/BaO2 nanoparticles precipitated on the surface of Ba-containing materials under high-temperature oxygen-rich conditions had ultra-high activity for oxygen activation.
Researchers have developed perovskite solar cells with improved efficiency and stability thanks to the addition of ferrocene layers. The devices can now reach 25% efficiency, approaching traditional silicon cells, and maintain over 98% of their initial performance after 1,500 hours.
Researchers have created a new solvothermal method to produce single-crystalline titanium dioxide nanoparticles that can enhance the scalability of perovskite solar cells. The resulting cells demonstrated improved power-conversion efficiency and operational stability, with values reaching up to 24.05% and 84.7% fill factor.
A research team from City University of Hong Kong and Imperial College London developed a new strategy for highly efficient and stable perovskite solar cells using ferrocene molecules. The breakthrough invention can achieve efficiency of up to 25% while maintaining stability, making it a promising alternative to silicon solar cells.
Scientists at KAUST have studied charge carrier behavior in perovskite thin films using laser pulses and terahertz radiation. They found that increased density of charge carriers narrows the energy gap for electrons to be excited by light, and charge carriers become more localized at higher densities.
A new machine learning-based system developed by MIT and Stanford researchers enables the rapid development of optimized production methods for perovskite-based solar cells. The system has already led to the manufacturing of cells with an energy conversion efficiency of 18.5 percent, a competitive level for today’s market.
Researchers at the University of Cologne and the University of Wuppertal have developed a tandem solar cell that achieves an unprecedented 24% efficiency, outperforming previous records. The innovative design combines organic and perovskite-based absorbers with an indium oxide interconnect to minimize losses.
Researchers at Kyoto University have discovered a scaling law that determines high-order harmonic generation in the perovskite material Ca2RuO4. The phenomenon, which was first observed in atomic gas systems, has been found to be highly dependent on temperature and gap energy.
Researchers at NC State University discovered that built-in thermal shock absorbers in perovskites protect dipoles from thermal interference, enabling room-temperature superfluorescence. The 'Quantum Analog of Vibration Isolation' mechanism creates a filter that allows synchronized emission of photons.
Researchers at NCCR MARVEL identified two new cubic prototypes that exhibit energetically and dynamically stable paraelectric behavior, providing a microscopic representation of the material's properties. The discovery has significant implications for the study of ferroelectricity, superconductivity, and other functional materials.
This special issue of Energy Material Advances highlights recent progress in synthesizing and tuning perovskite nanocrystals and other emerging nanocrystal materials. Research focuses on fundamental understanding of doping, synthesis, and spectroscopy, as well as applications in solar cells and light-emitting diodes.
Researchers developed a passivation strategy to improve the performance of quasi-2D perovskite light-emitting diodes by suppressing thermal-induced fluorescence quenching. The strategy, using alkyl phosphates as passivation functional groups, resulted in higher EQE peak values and improved device stability at high temperatures.
A research team from POSTECH has developed a method to print high-performance p-type semiconductor transistors using inorganic metal halide perovskite, exhibiting high hole mobility and current ratio. This technology enables solution-processed perovskite transistors to be simply printed as semiconductor-like circuits, paving the way fo...
Researchers at NC State University have developed a 'self-driving lab' that uses artificial intelligence and fluidic systems to advance our understanding of metal halide perovskite nanocrystals. The technology can autonomously dope MHP nanocrystals, adding manganese atoms on demand, allowing for faster control over properties.
Researchers at Politecnico di Milano developed a new approach using additives that form halogen bonds with halide ions in perovskites, improving stability and efficiency. This technique enables the creation of hydrophobic and water-repellent perovskites, blocking trap states and increasing electrical energy conversion.
Researchers found that a common surface treatment creates an electron-rich surface that destabilizes the perovskite solar cells, leading to degradation. A new method using positively and negatively charged ions resolves this issue, allowing for more stable solar cells with up to 87% efficiency retention.
The researchers successfully fabricated large-area sky-blue perovskite light-emitting diodes (PeLEDs) with a high external quantum efficiency of 10.3%. The blade-coating method enabled the production of uniform films with small grains, leading to improved luminescence uniformity and brightness.
Researchers have discovered a surprisingly soft mineral, davemaoite, that plays a crucial role in the Earth's recycling of rocks. The study suggests that davemaoite is around 1,000 times softer than other minerals in the mantle, and its mechanical properties can help explain how earthquakes and volcanoes occur.
Researchers at KAUST developed a multilayered perovskite-based film that shields high-performance solar cells from extreme heat and moisture while boosting their long-term stability. The 2D perovskite capping layer improves the resistance of unsealed devices against thermal stress and moisture.
Researchers improve solar cell performance predictions by analyzing terahertz and microwave spectroscopy data, enabling more accurate assessments of material quality. This advancement can quickly test new semiconducting materials for their potential suitability.
The KAUST team has created a flexible and efficient scintillation film using lead-free metal halides, detecting X-rays at levels 113 times lower than standard medical imaging doses. This breakthrough enhances medical, industrial and security X-ray imaging, offering significant improvements in spatial resolution.
Researchers have successfully combined perovskite with silicon in a tandem cell, achieving an efficiency of 21.3%. The team estimates the PCE to be 29.5%, with potential for further improvement through surface optimization.
KAUST researchers develop an artificial electronic retina that mimics human vision and recognizes handwritten numbers with high accuracy. The retina uses perovskite nanocrystals to detect light intensity via capacitive change, offering a more energy-efficient alternative to existing systems.
Researchers demonstrate a two-terminal tandem solar cell with enhanced efficiency through spectrum splitting, achieving a 5-6% gain in absolute efficiency. The design uses planar and Lambertian spectral splitters to effectively distribute sunlight among the top and bottom cells.
Researchers propose a novel 2D/3D core-shell structure to overcome defects in tin-based metal-halide perovskites. The hybrid arrangement eliminates series resistance issues and high carrier density problems, enabling improved performance in planar devices.
Scientists develop blue LEDs based on metal halide perovskite with asymmetrical bridges to hold layers together, creating a more stable structure. This breakthrough solves the halide segregation problem and brings perovskite LEDs closer to commercialization.
Researchers developed a low-cost and simple method to produce perovskite photovoltaic materials on an industrial scale, paving the way for creating lightweight and flexible solar cells. The new technique reduces waste and toxic byproducts associated with manufacturing perovskite photovoltaics.
A research group from the Dalian Institute of Chemical Physics used non-toxic GeX4 as precursors to synthesize Pb-free and Pb-based PNCs with improved optoelectronic quality. They attributed this success to better control over halide ion release, resulting in regular crystal surfaces with fewer point defects.
The NUS research team achieved a power conversion efficiency of 23.6% in their perovskite/organic tandem solar cells, approaching that of conventional silicon solar cells. This breakthrough paves the way for flexible, light-weight, and low-cost photovoltaic cells suitable for various applications.
Researchers replaced traditional electron-transport layers with quantum dot layers in perovskite solar cells, resulting in record power-conversion efficiencies of up to 25.7%. The use of quantum dots also enabled high operational stability and scalability, making them a promising solution for large-scale solar energy production.
Researchers at IAPP discovered that photon recycling improves light emission efficiency by a factor of ~5, significantly increasing photovoltage. This process enables perovskite solar cells to approach the upper limit of 34% efficiency in single-junction semiconductors.
KTU researchers have developed new materials that significantly improve the stability and efficiency of perovskite solar cells. The new materials use a passivation method to prevent degradation, achieving an efficiency of 21.4% in record-breaking solar modules.
Daniele Cortecchia wins ERC Starting Grant for innovative photoluminescent materials research, focusing on perovskite synthesis and application in photonics. The project aims to develop new methods for creating tunable optical properties.
Scientists from University of Cambridge created a new method to stabilize the perovskite material for solar cells, resulting in improved performance and stability. The approach uses an organic molecule as a 'template' to guide the material into its desired phase, achieving a near-perfect bandgap without compromising cost.
Researchers have developed a new hexagonal perovskite-related oxide with excellent ionic conduction at intermediate and low temperatures, paving the way for efficient solid oxide fuel cells. The material's stability and ion conduction remain dominant in reducing atmospheres.
Researchers have successfully incorporated phosphorene nanoribbons into new types of solar cells, achieving an efficiency above 21%, comparable to traditional silicon-based solar cells. The unique properties of PNRs, including improved hole mobility, enable the creation of high-performance optoelectronic devices.
Researchers from Forschungszentrum Jülich have developed a perovskite solar cell with exceptional stability, retaining 99% of its initial efficiency after 1450 hours of operation. The new design features a double-layer polymer structure that protects the contact point and ensures stable conductivity.
Researchers developed a new process to produce stable formamidinium perovskite (FAPbI3) materials, which can be used to make more efficient and stable solar cells. The novel approach uses lower temperatures and eliminates additives, making it suitable for large-scale production and flexible solar cell applications.
Researchers at KAUST have developed a nanocomposite that absorbs X-rays with near-perfect efficiency and re-emits the energy as light. This innovation improves high-resolution medical imaging and security screening, with detection limits up to 142 times lower than traditional methods.
A new database has been launched to systematically record findings on perovskite semiconductors, featuring over 42,000 individual data sets and analysis tools for interactive exploration. The FAIR principles guide the preparation of the data, enabling easy searching with modern algorithms and artificial intelligence.
Researchers have demonstrated a novel topology arising from losses in hybrid light-matter particles, introducing a new avenue to induce topological effects. The study found that the mere presence of loss in an exciton-polariton system causes it to exhibit nontrivial topology.
Scientists from OIST and University of Cambridge discovered distinct types of defects in state-of-the-art perovskite thin films, which may hinder solar cell efficiency. The most detrimental defects were grain boundaries and polytypes, while lead iodide defects had a benign impact on performance.
Researchers have developed a room-temperature perovskite polariton parametric oscillator, enabling scalable and low-threshold nonlinear devices. This breakthrough offers possibilities for the development of cost-effective and integrated polaritonic devices.
Researchers have developed a novel method to improve the efficiency of inverted architecture perovskite solar cells by introducing organic halide salts at both interfaces. This approach has achieved a power conversion efficiency of 23.7%, the highest reported to date, while also improving device stability.
Scientists reveal an ultrafast and high-yield polaronic exciton dissociation mechanism in 2D perovskites, contradicting previous theories. This study confirms that free-carriers dominate charge carriers in 2D perovskites under room temperature.
Perovskite materials have emerged as promising alternatives to crystalline silicon for producing solar panels. Despite defects that reduce performance, perovskites show impressive efficiency levels comparable to silicon alternatives. Researchers used multimodal microscopy methods to visualize and explain the complex interactions betwee...
Researchers discovered that sunlight contracts the space between atomic layers in 2D perovskites, improving photovoltaic efficiency and stability. The new material shows a threefold increase in electron conduction and is less prone to degradation.
Researchers have developed highly efficient flexible perovskite solar cells by annealing a SnO2 ETL in a rough vacuum at a low temperature, achieving 20.14% efficiency and improved interface connection.