Articles tagged with Light Emitting Diodes
Researchers created a blue light-emitting diode from halide perovskites, but discovered the materials are inherently unstable due to their weaker ionic bonds. The crystal structure changes with temperature, humidity, and chemical environment, affecting optical and electronic properties.
Researchers at Hokkaido University developed a stacked nanocarbon antenna that makes europium shine brighter than previous designs, with potential to create more efficient photosensitizers. The new design uses low-energy blue light absorption, reducing energy loss and enabling photodynamic therapy applications.
Researchers at Osaka University have designed and synthesized a new molecular emitter for organic light-emitting diodes (OLEDs), using rational chemical design with U-shaped synthetic building blocks. The efficient macrocyclic OLED emitter could potentially be used in tiny, energy-efficient chemical sensors.
Researchers at ETH Zurich developed a new QLED screen technology using ultra-thin nanoplatelets that emit light in one direction, increasing energy efficiency and reducing scattering losses. The technology produces high-intensity blue light with around two-fifths of the generated light reaching the observer's eye.
Researchers successfully demonstrated a quantum dot LED that operates as an optically pumped laser, clearing the path towards versatile colloidal quantum dot laser diodes. These devices have the potential to revolutionize fields like photonics, optoelectronics, and medical diagnostics.
Researchers developed a smart photonic contact lens that measures glucose concentration in conjunctival blood vessels, enabling diabetic diagnosis. The device also shows promise for treating diabetic retinopathy by reducing angiogenesis and verifying clinical feasibility.
Rutgers research reveals information gaps on optimal LED light intensity and colors for indoor crops, aiming to improve energy efficiency. The study recommends using a spectroradiometer to calculate light ratios and develop standard definitions for specific wavebands essential for plant growth.
Researchers have created BaZrS3 thin films with strong light absorption and good charge transport, making them ideal for photovoltaics and LEDs. The new materials could lead to more efficient solar panels and lower energy costs.
Researchers demonstrate direct emission of orthogonal handed circular polarization from achiral luminophore using liquid crystalline phase. The twisted structure allows for the generation of CP light with various polarization states.
Researchers found that bats avoid all light colors and prefer dark entrances, regardless of color. Inside caves, bats react sensitively to any light, showing a slight preference for red over amber and white lights only when dark was not an option.
Researchers at Tohoku University developed a non-destructive technique using omnidirectional photoluminescence spectroscopy to detect carbon impurities in GaN crystals. This method improves energy efficiency and reduces costs associated with traditional detection methods.
Researchers at the Institute for Basic Science discovered a carrier multiplication process in 2D semiconductors that could improve the efficiency of solar cells. The phenomenon is more efficient in 2D materials than in bulk semiconductors and has the potential to increase the maximum power conversion efficiency up to 46%
A new type of programmable organic capacitive memory called pinMOS is introduced, which stores several states due to controllable charge addition or removal. The pinMOS memory is promising for future applications in electronic and photonic circuits.
Researchers developed a simple and low-cost method to create meter-scale transparent conductive circuits based on silver nanowires, enabling rigid and flexible transparent LED screens with improved transparency and conductivity. The new technology could expand the applications of transparent LED screens to large-angle curved areas.
Researchers found that prolonged blue light exposure damages brain and retinal cells, leading to impaired locomotion in Drosophila melanogaster. Flies without eyes also showed damage, suggesting blue light's harmful effects extend beyond visual perception.
Researchers found that age-dependent effects on color perception can lead to different perceptions of white LED lighting. Designs that consider these differences can improve the aesthetic appeal of LED lighting. The study suggests using modern colorimetry to minimize inter-user discrepancies in LED emitters.
Computer simulations reveal that certain metal complexes can exhibit rapid spin-flip processes, making them useful for precise control of electron spins in quantum computers. The study used enormous computational power to model the behavior of rhenium complex and found a spin-flip process taking place within ten femtoseconds.
Researchers at City College of New York have successfully demonstrated a light-emitting diode (LED) operating at room temperature, utilizing half-light half-matter quasiparticles in atomically thin semiconductors. This breakthrough has significant implications for LiFi technology, which offers faster data transmission speeds than Wi-Fi.
Researchers at Rice University have created a tunable, nanoscale incandescent light source by combining near-nanoscale materials that absorb heat and emit light. The system's unique configuration allows for the emission of light in specific states and wavelengths, including infrared.
The discovery of localization states in InGaN materials enables the creation of high-efficiency LEDs. Researchers have confirmed the existence of these energy minima states, which capture charge carriers and improve luminescence efficiency.
Researchers at Tohoku University developed a new method to quantify the efficiency of crystal semiconductors, a crucial step towards creating more efficient light-emitting diodes (LEDs) and solar cells. The method uses photoluminescence spectroscopy to detect the emitted light energy, providing a unique indicator of the crystal's quality.
The team discovered a new strategy to design highly efficient perovskite-based LEDs by leveraging the quantum confinement effect, which allows for superior mobility of electrons and holes. This results in attractive light-emission properties, enabling record-setting performance in terms of brightness and power efficiency.
Scientists have developed a new strategy for constructing photonic heterostructure crystals with tunable properties, which can absorb and transmit photons. These crystals, in the form of striped rods, exhibit unique fluorescence behavior and serve as a prototype for a logic gate.
Scientists at North Carolina State University have created a method to remotely control, lock into place, and later transform the shape of soft robots using light and magnetic fields. The technology is promising for medical and aerospace industries.
Hybrid organic-inorganic perovskites, used in optoelectronic devices, have improved efficiency after solution-treating with benzylamine. The treatment creates a two-dimensional material that restructures the material and reduces defect states.
Researchers developed a new approach to optimize highly efficient perovskite LEDs by exploring the performance of an amorphous zinc-silica-oxide system layered with perovskite crystals. The resulting devices showed improved efficiency, brightness, and light out-coupling efficiency, particularly in green diodes.
Scientists at Kyushu University created micrometer-thick OLEDs using a hybrid perovskite approach, overcoming manufacturing constraints and color distortion issues. The devices exhibit improved efficiencies and lifetimes, paving the way for low-cost, reliable, and uniform fabrication of OLED-based displays.
Researchers at Stanford University have designed a photon diode that can only flow in one direction, enabling faster solutions to scientific, mathematical and economic problems. The device uses nanostructures and metasurfaces to manipulate light and break time-reversal symmetry.
The researchers have developed a method to fabricate high-quality perovskite light emitters and consequently high-efficiency perovskite LEDs. By introducing a metal oxide, ZnO, they achieve precise control over the crystallization process, leading to near-infrared LEDs with a quantum efficiency of 19.6%.
Researchers have developed a novel material that can be controlled by green LED light and darkness, enabling the creation of temporary support scaffolds for 3D printing. The material has potential applications in manufacturing, recycling, and cell biology research, revolutionizing the field of dynamic materials.
Researchers at TU Dresden have created a method to free trapped photons in OLEDs, boosting efficiency by up to 76.3%. The technique uses reactive ion etching to generate controllable nanostructures that can be tailored for optimal outcoupling.
Scientists at Max Planck Institute create a single-layer OLED that outperforms traditional designs in terms of brightness and efficiency. The new technology achieves record-high luminosity and long lifetimes, making it suitable for industrial purposes.
The ENLIGHT'EM project is developing a new discipline in Low-energy Visible Light IoT Systems, integrating VLC and networked embedded systems. Researchers will be trained to spearhead the development of sustainable IoT networks, with potential applications in connected energy, light, living, and cities.
Scientists at NREL and partner institutions create large stability map of ternary nitrides, highlighting promising compositions for experimental discovery. The map uses computational materials science and machine-learning algorithms to accelerate the process, opening new avenues for nitride research.
Researchers are developing a light-based technology to increase energy available to brain cells and improve astronaut performance. The new LED device aims to replace lasers as the delivery method for near-infrared light to stimulate mitochondria and create more oxygen in the brain.
Researchers developed a computational approach to design new hybrid halide semiconductors, discovering 13 new material candidates for solar cells and 23 for LEDs. The study used large-scale quantum mechanics calculations to identify novel materials with excellent optoelectronic properties.
Researchers at Osaka University have discovered that zinc oxide (ZnO) thin films exhibit the fastest excitonic radiative decay rate ever recorded, surpassing thermal dephasing rates. This breakthrough could lead to the development of ultra-fast and energy-efficient photonic devices with non-thermogenic properties.
A new technique allows for color-tunability in a single GaN-based LED by manipulating emission properties of an atomic-type dopant. The result could pave the way for monolithic integration and comfortable warmer white light from LEDs.
Chemists at the University of Innsbruck have created a novel red phosphor called SALON, which emits light in the visible red range and reduces energy loss. This breakthrough could lead to more efficient white LEDs with improved color quality.
Researchers at NTNU have created a new electronic component that emits ultraviolet light, replacing traditional fluorescent lamps with a non-toxic and cheaper alternative. The technology has the potential to increase market demand for UVC products by 40% annually.
Researchers from Moscow Institute of Physics and Technology have found superinjection to be possible in homostructures, composed of a single material. This enables the creation of mass market devices, such as ultraviolet LEDs thousands of times brighter than previously thought possible.
Scientists at NRL discovered a new method to passivate defects in next generation optical materials, improving optical quality and enabling miniaturization of light emitting diodes. The technique produces a 100-fold increase in material's optical emission efficiency, paving the way for high-efficiency optoelectronic devices.
Researchers at TU Wien develop innovative light-emitting diode by harnessing radiative decay of exciton complexes in ultra-thin layers, enabling precise control over desired light wavelengths.
Researchers have developed a new methodology that allows solid state lighting to measure and self-adjust its spectral power distribution based on environmental conditions. This enables the system to maintain consistency and stability over time, making it suitable for applications requiring precise light spectra.
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 found that LED lighting generally outperforms HPS lighting in greenhouse production, producing higher-quality flowers with potential economic benefits. The study suggests LED technology is capable of replacing HPS for supplemental lighting in cut gerbera production during darker periods.
Researchers at NIST boost ultraviolet light-emitting diodes (LEDs) by up to five times using a special shell design, enhancing applications in polymer curing, water purification and medical disinfection. The new LEDs utilize p-i-n core-shell nanowire heterostructures with added aluminum, improving electroluminescence efficiency.
Researchers at Tohoku University discovered that terraced steps in AlGaN-based LED fabrication increase efficiency by forming micropaths of electric current. This process enhances the conversion of electrical energy to optical energy, paving the way for more efficient LEDs.
University of Houston chemist Thomas Teets tackles three topics: blue light-emitting compounds, near-infrared spectra, and photocatalysts for organic synthesis. He also leads educational projects to introduce children and art enthusiasts to the chemistry of light.
Researchers at Penn State developed firefly-mimicking structures to improve light extraction efficiency in LEDs, achieving up to 90 percent. Asymmetric microstructures increase surface area for interaction with light and promote randomization of reflections, allowing more light to escape.
Scientists have developed a method to directly write quantum light sources into monolayer semiconductors, enabling precise placement and real-time design of arbitrary patterns of single photon emitters. This breakthrough paves the way for emerging applications in secure communications, sensing, and quantum computation.
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.
Researchers used reverse-biased LEDs to cool devices by harnessing thermal radiation, a concept commonly used in battery operation. This approach could lead to new solid-state cooling technology for microprocessors, enabling faster and more efficient computing.
Researchers at Aalto University developed an AI called ARTIST that instantly determines molecular reactions to light, accelerating the development of new technologies such as wearable electronics and flexible solar panels. This approach has the potential to slash research and development costs.
A KAIST team has developed a noninvasive light-sensitive photoactivatable recombinase suitable for genetic manipulation in vivo. The new tool enables spatiotemporal control of gene expression in the mouse brain with high precision and minimal side effects.
A study led by Newcastle University found that turning off street lights at midnight has no negative impact on moths' ability to pollinate plants. In fact, it may even help restore natural behavior. By switching off part of the night, local authorities can save energy while supporting nocturnal wildlife.
The Graduate School of Creative Design Engineering at UNIST showcased its innovative 'stool.D' design, combining technology and art to create a functional and stylish piece. The stool features LED lights that provide visual feedback with pedaling speed, promoting exercise while sitting.
Researchers suggest engineered light can regulate human health and productivity by eliciting hormonal responses, while tailored LED wavelengths stimulate plant growth and increase nutritional value. The broader integration of LEDs with technology holds potential for significant societal value beyond energy savings.
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.
Jakoah Brgoch aims to improve energy efficiency in LED lighting by developing new materials and algorithms. He will use machine learning to identify new phosphors and predict material behavior under temperature changes.