Articles tagged with Perovskites
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 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.
Researchers fabricated large-area periodic lead halide perovskite nanostructures using a space-confined solution growth method. These structures were able to modulate reflection and control light emission angles, enabling low-threshold lasing and realization of lenticular printing laser displays.
Researchers at Rice University and Los Alamos National Laboratory have discovered a technology to make electron sources from halide perovskite thin films, efficiently converting light into free electrons. The cost savings come from abundant and inexpensive raw materials and a simpler manufacturing process.
Researchers created perovskite solar modules with improved stability and efficiency using a new fabrication technique that reduced defects. The modules showed high efficiencies for over 1000 hours, overcoming obstacles in scalability.
Researchers at Seoul National University and University of Pennsylvania developed highly efficient perovskite light-emitting diodes (PeLEDs) with an external quantum efficiency of 23.4%, surpassing previous records in PeLEDs and InP-based green emitting QD-LEDs.
Researchers have found a novel solution to stabilize the unstable black phase of a lead halide perovskite, which has potential for being cheaper and easier to manufacture than current silicon solar cells. The stable material remains resistant to deterioration and efficient at room temperature.
Scientists have developed a novel, doped-free hole-transporting layer for perovskite solar cells, achieving 21% power conversion efficiency and improved durability in humid air. The new material outperforms reference materials and protects the perovskite organic cell from degradation.
Researchers at Linköping University have developed efficient blue light-emitting diodes based on mixed halide perovskites, achieving stable emission in the deep blue to sky blue range. The new LEDs are made using the vapour-assisted crystallisation technique and exhibit an energy efficiency of up to 11%.
Researchers found that adding capsaicin to perovskite solar cells increases electron density and reduces nonradiative recombination, leading to more efficient and stable devices. The addition also promotes charge transport and suppresses heat losses.
Researchers have found that halide perovskite nanocrystals exhibit extraordinary energy transport properties, allowing them to travel longer distances than conventional nanostructures. This discovery has significant implications for the development of high-efficiency solar cells and light-emitting devices.
Researchers used X-ray laser to directly measure formation of polarons, fleeting distortions that affect material's behavior. The study reveals that polarons form large, expanding bubbles that travel along with electrons, potentially explaining why lead hybrid perovskites achieve high efficiencies in solar cells.
Researchers at HPSTAR have discovered a universal relationship between regulating off-centering distortion and maximizing photoluminescence in halide perovskites. By applying high pressure, they achieved optimal PL performance, ten-fold enhancement, and new paths to high-performance optoelectronic materials.
Researchers at Helmholtz-Zentrum Berlin have developed a perovskite/silicon tandem solar cell achieving a record 29.15% efficiency, surpassing previous records. The new value has been certified and is at the top of the entire Emerging PV category in the NREL chart.
Scientists at the University of Tsukuba investigated perovskite solar cell deterioration using electron spin resonance spectroscopy. They discovered that changes in spin states are linked to changes in hole transport and interfacial electric dipole layer formation, suggesting potential ways to prevent degradation.
Researchers at EPFL have developed a perovskite material that can detect gamma rays with high efficiency, meeting the requirements for simple, reliable, and cheap detectors. The material, made of methylammonium lead tribromide crystals, shows high clarity and can be grown from abundant and low-cost raw materials.
Researchers at Oregon State University have developed a breakthrough optical sensor that can mimic the human eye's ability to perceive changes in its visual field. The sensor uses ultrathin layers of perovskite semiconductors to detect light intensity changes, enabling it to prioritize signals from photoreceptors detecting movement.
A new detector using cesium lead bromide perovskite crystals has been developed to aid in the detection and identification of radioactive isotopes. The device achieves high resolution in energy detection, allowing for differentiation between legal and illegal gamma rays.
Research team led by HPSTAR discovered that isotope effect can significantly suppress lattice distortion in hybrid perovskites, leading to enhanced photoluminescence and structural robustness. This breakthrough suggests a new path for designing more stable photovoltaic materials with superior performance.
The study uncovered essential properties of ions in metal halide perovskites, which have a negative effect on the efficiency and stability of perovskite solar cells. The researchers found that all ionic defects meet the Meyer-Neldel rule, revealing fundamental information about ion hopping processes in perovskites.
This study demonstrates CsPbBrI2 perovskites with improved optoelectronic performance through secondary grain growth functionalization. The resulting devices exhibit ultra-low energy loss, higher carrier mobility, and record PCEs under various light sources.
Researchers develop rapid-spray plasma processing technology to produce stable and efficient perovskite solar cells at record-breaking speeds. The new method enables mass production of perovskite modules with high power conversion efficiency and low costs, potentially transforming the solar industry.
Researchers at POSTECH developed organic spacer molecular additive to improve perovskite solar cells' photoelectric efficiency and stability. The new material reduces internal defects and increases moisture resistance, achieving 21.3% efficiency and maintaining over 80% of initial performance under humid conditions.
Researchers developed a stable oxide scaffold for perovskite solar cells, allowing for easy removal and replacement of the material while maintaining performance. The new design achieved around 11.08% power conversion efficiency upon perovskite replacement.
The study found that molecular conformation affects charge carrier mobility and broadband emission in 2D organic-inorganic hybrid perovskites. The researchers discovered a strong correlation between the gauche defect, local chain distortion of organic cations and in-plane mobility reduction.
A team at HZB explores compositions of CsPb(BrxI1?x)3 for their potential to improve the stability and efficiency of solar cells. The study reveals tunable optical band gaps between 1.73 and 2.37 eV, making these mixtures suitable for multi-junction solar cell applications.
Scientists have successfully controlled the composition of perovskite ions in hybrid organic-inorganic nanocrystals, maintaining their morphology and light-emitting efficiency. This breakthrough enables the synthesis of perovskites with varying compositions, advancing the development of efficient solar cells and light-emitting devices.
Oregon State University researchers have made a key advance in printing circuitry on wearable fabrics using inkjet printing and perovskite materials. The breakthrough enables the direct application of circuitry onto cloth at lower processing temperatures, potentially solving the trade-off between performance and fabrication costs.
Scientists at KAUST create a perovskite ink suitable for mass production using slot-die coating, improving solar cell efficiency to up to 21.8%. The ink can also be coated onto silicon to produce tandem solar cells capturing even more of the Sun's energy.
Scientists at Linköping University develop a lead-free magnetic double perovskite with interesting optoelectronic properties, opening the possibility of coupling spintronics with optoelectronics. The new material exhibits a magnetic response at temperatures below 30 K.
A new technique allows reliable atomic-resolution images of hybrid photoactive perovskite thin films, unlocking insights into their atomic makeup and properties. The breakthrough enables researchers to study grain boundaries and crystal defects with unprecedented precision.
Researchers developed feasible approaches for durable perovskite photovoltaics by addressing internal instability, chemical degradation, and environmental factors. Compositional engineering and bonding passivation are promising methods to improve device durability.
Researchers at FSU investigated perovskite materials to improve their stability under real-world conditions. They found that adding cesium increases the material's stability and performance under light and elevated temperatures.
Scientists at NREL developed a next-generation thermochromic window that reduces energy consumption and generates electricity. The new technology enables various colors and temperature-driven color changes, increasing design flexibility and control over building aesthetics.
Researchers have found a surprising solution to stabilize mixed-halide perovskites, a crucial material for efficient solar photovoltaics. Increasing the intensity of light can undo the disruption caused by lower intensities, allowing researchers to control the material's bandgap and improve device efficiency.
The University of Surrey has made significant advancements in perovskite tandem solar cells, achieving higher power conversion efficiencies through adjustments to thickness and the development of more effective protective layers. This progress holds promise for accelerating commercialization and promoting a shift towards green energy.
Scientists have used neutrons to study the twin structure of halide perovskites, a class of materials crucial for high-efficiency solar cells. The research reveals that crystals grown at room temperature also form twins, providing new insights into their crystallization and growth process.
Researchers at Seoul National University have developed an air-stable color conversion layer using perovskite nanocrystals and a flexible polymer matrix, enabling the creation of stretchable displays that can be bent, stretched, and attached to the skin. The new material has shown improved stability and photoluminescence intensity unde...
Researchers at EPFL have developed a novel deposition method that enables the creation of highly efficient and stable black-phase FAPbI3 perovskite solar cells. The new method, which uses vapor-assisted deposition, overcomes the stability issues associated with traditional methods, resulting in power-conversion efficiencies of over 23%.
A team of scientists developed wearable LiFi based on electroluminescence-photodetection bifunctional fibers enabled by perovskite QDs. The fibers possess a narrowest luminescence spectrum and can simultaneously transmit and receive information.
Researchers from City University of Hong Kong have developed a novel method to tackle instability and potential environmental impact in perovskite solar cells, achieving high power conversion efficiency while minimizing lead leakage. The team's innovative use of 2D metal-organic frameworks enhances device performance and stability.
The study reveals that the insulating ground state in NaOsO3 can be preserved up to 35 GPa, with a sluggish metal-insulator transition reduction from 410 K to near room temperature. The team also finds hidden hysteretic resistance properties and electronic character anomalies under pressure.
Scientists investigate how perovskite/silicon tandem solar cells perform in sunny and hot environments, finding that the perovskite bandgap gets larger as the device heats up, allowing more stable compositions to be used.
Researchers have created a new kind of liquid scintillator by combining perovskite nanocrystals with organic molecules, enabling efficient X-ray detection and high-resolution imaging. The hybrid material outperforms conventional scintillators in terms of quantum yield and scintillation decay time.
Researchers have successfully overcome the phenomenon known as lasing death in quasi-2D perovskites by managing triplet excitons. By incorporating an organic layer to hold triplets in a low energy state, continuous lasing was achieved under constant optical excitation.
A CU student collaborated with three research teams to study perovskite nanocrystals, which have numerous applications. The team discovered a phase transition that affects the material's optical properties and has relevance to applications already in use.
Researchers develop a non-toxic Cs2Ag0.6Na0.4In0.85Bi0.15Cl6 double perovskite scintillator for high-performance X-ray imaging with low doses, enabling high-resolution images in medical and industrial applications.
Two types of solar cells, perovskite and organic, were tested in space as part of the MAPHEUS 8 program, achieving efficiency levels of 25% and generating power under exceptional conditions. The results show promise for future aerospace applications, particularly for missions to the outer solar system.