Articles tagged with Light Emitting Diodes
Ludwig-Maximilians-Universität München researchers have developed a method for producing semi-conducting nanocrystals with controlled size, enabling the creation of color-tuned LEDs. The new method uses perovskite-based nanocrystals and allows for high color fidelity and industrial-scale production.
A new technology using photoswitch molecules allows for the creation of 3D light structures viewable from 360 degrees, with potential applications in biomedical imaging, education, engineering, and entertainment. This discovery could also improve medical diagnosis by providing real 3D images from MRI scans.
Ames Laboratory scientists are developing low-dimensional nanomaterials to enhance the performance of solar cells, TV displays, and computer technology. The goal is to broaden the science of these materials and explore their properties.
Researchers introduce a new bottom-up approach to pattern emissive polymers, enabling efficient creation of multi-colored OLED arrays. The method uses designer iridium photocatalysts and could potentially enable high-throughput manufacturing of OLEDs using various technologies.
Researchers fabricated and tested Ag/ZnO-Nanorods Schottky diodes for UV detection, achieving cost-effective and low-voltage applications. The devices demonstrated good sensitivity and rapid response times.
Optical isolators are crucial for signal routing and protection in photonic circuits. Researchers demonstrated complete optical isolation within any dielectric waveguide using a simple approach without magnets or magnetic materials. The technique achieves ideal characteristics such as zero loss and perfect absorption, expanding on-chip...
Researchers created photonic hypercrystals to control light-matter interaction, increasing light emission rate and intensity. This breakthrough could lead to advancements in Li-Fi, solar cells, and quantum information processing.
Scientists have discovered a new phenomenon called the photodielectric effect, which could lead to the creation of laser-controlled touch displays. The discovery uses light to increase the dielectric permittivity of a material, allowing for more efficient energy storage and filtering.
Researchers from the University of Cambridge and beyond develop a new type of material that uses rotatable molecules to emit light faster than ever before. This breakthrough could lead to more power-efficient, brighter, and longer-lasting TVs, smartphones, and room lights.
Researchers at MIT Media Lab describe a new technique that makes image acquisition using compressed sensing 50 times as efficient. The technique enables the development of novel imaging systems without lenses, opening new prospects for design and applications in harsh environments or non-visible spectrum wavelengths.
Researchers at Oxford University have developed a system to transmit quantum keys, ensuring data security and detecting eavesdropping. The prototype uses movable mirrors and ultrafast LEDs to send secret pin-codes over short distances, improving the security of contactless transactions.
Researchers have demonstrated a prototype device that can send unbreakable secret keys from a handheld device to a terminal, enabling secure mobile transactions. The system uses ultra-fast LEDs and moveable mirrors to transmit keys at a rate of over 30 kilobytes per second.
Researchers have developed layered 2D hybrid perovskites with nanometer thickness, improving optoelectronic performance for efficient devices. The discovery of layer-edge-states at the edges of perovskite layers enables uninhibited charge transport and enhances photovoltaic and light-emitting properties.
A Cornell research group has reported progress in creating a smaller, more earth-friendly alternative to mercury-based deep-UV lamps. Using atomically controlled thin monolayers of GaN and AlN, they produced deep-UV emission with a light-emitting diode (LED) between 232 and 270 nanometer wavelengths.
A novel non-pharmacological approach using green LED has shown promising results in treating neuropathic pain in rats with no side effects observed. The therapy may work by increasing levels of endogenous opioids, which inhibit pain and decrease inflammation.
Researchers at Osaka University create tri-color changing materials that exhibit efficient thermally activated delayed fluorescence and enable the production of high-performance OLEDs devices. The materials display a range of colors in response to temperature and pressure, showing promise for applications such as pressure- and temperat...
Researchers developed dual-function nanorod LEDs that can emit, detect, and respond to light. These LEDs can be used in display arrays that adjust brightness based on ambient light conditions and recognize objects through touchless gestures or laser stylus input.
Scientists successfully demonstrate circularly polarized electroluminescence from spin-polarized LEDs at room temperature, without external magnetic fields. The discovery opens up new avenues for spintronics and potential applications in secure optical communications, cancer diagnosis, and optically enhanced nuclei imaging.
New research suggests that LED street lighting can have a major impact on wildlife, but that adjusting the lighting schedule and dimming it by 50% can reduce its effects. The study found that changing the way we light at night could have profound consequences for species such as predatory spiders and beetles.
Researchers at Eindhoven University of Technology have developed a nano-LED that is 1000 times more efficient than predecessors, enabling gigabits per second data speeds. The new light source has the potential to take the brake off data traffic growth on chips.
A team of scientists has designed a new display made from natural elements, including luminescent proteins. This technology enables the creation of energy-efficient Bio-displays with low production costs and high image quality, offering an ecological solution to traditional displays' limitations.
Researchers at Princeton University have developed a technique to create ultra-fine grained films using self-assembling nanoparticles, leading to more efficient and stable perovskite-based LEDs. This advancement brings perovskite technologies closer to commercialization and could speed the adoption of lower-cost and environmentally fri...
Research from Kyushu University found that even small amounts of impurities in the vacuum chamber can significantly impact OLED lifetime. The study analyzed environmental conditions and detected a correlation between shorter deposition times and increased degradation rates.
Researchers at Virginia Tech have found that new LED lighting in milk display cases can enhance the taste of milk, improving its sweet and rich flavors. The study also highlights the importance of protecting nutrients like riboflavin from light exposure to maintain milk's nutritional value.
A recent study by researchers at the University of Bristol found that LED lights are less attractive to nuisance insects compared to traditional filament lamps. The study, funded by the Natural Environment Research Council and Integral LED, used customised traps at 18 field test sites across south-west England.
Researchers at Ohio State University have developed lightweight, flexible metal foil-based LEDs for portable ultraviolet light purification of drinking water and sterilization of medical equipment. This technology has the potential to make safe drinking water accessible in remote areas.
Researchers at UCSB found that trace metals like iron can act as nonradiative recombination centers in gallium nitride semiconductors, reducing LED efficiency. The study highlights the importance of controlling growth and processing to prevent metal impurities from affecting device performance.
Researchers found that ground beef color fades quickly due to light exposure, but LED lights can slow down this process. The study showed that LED lighting retained a better red color on day 5 compared to fluorescent lighting.
Researchers at Lehigh University found gallium nitride has a wear rate approaching that of diamonds, making it suitable for touch screens, space vehicles and RF MEMS. The material's tribological properties have been studied extensively but virtually no studies were done on its resistance to mechanical wear.
A 12-month LED street lighting trial in Brisbane, Ipswich, and Townsville found power savings of up to 82% compared to traditional High Intensity Discharge (HID) lights. The trial also demonstrated significant energy savings of up to 60% when combined with smart lighting control.
Researchers at Chalmers University of Technology have developed a new electronic 'paper' that is bendable and gives all the colors of a standard LED display. The material requires significantly less energy than a Kindle tablet, making it suitable for well-lit places such as outdoor displays.
Researchers have designed metal-free phosphorescent molecules that glow persistently at room temperature, overcoming challenges of organic compounds emitting light only at low temperatures. The molecules can be tuned to emit different colors and are potentially three times more efficient than fluorescent LEDs.
A team of scientists from the University of Vermont and Dartmouth College have discovered a new way that some molecules can make a luminescent glow, breaking Kasha's Rule. The newly discovered pathway to creating light may prove useful in industrial materials, LEDs, and biomedical imaging.
Researchers have directly observed negative refraction for electrons passing across a boundary in graphene, mimicking light behavior. This finding could lead to the development of new types of electron switches and enable new experimental probes, such as on-chip electron microscopes.
Researchers have developed a more cost-effective and environmentally friendly white LED using graphene and a strontium-based metal-organic framework material. The new technology could save nearly 348 terawatt-hours of energy by 2027, equivalent to the annual output of 44 power plants.
A study by Ohio State University researchers found that taller individuals have a natural advantage when it comes to spatial relations and judging the location of targets in their middle-distance vision. This ability is particularly important in situations with limited visual cues, such as darkness or obstacles.
Researchers found that end-of-day far-red and blue light treatment alleviate intumescence injury in tomato seedlings. High blue photon flux ratio during the photoperiod also mitigates intumescence injury, with a synergistic effect observed when combined with EOD-FR light.
KAUST researchers develop a nanocrystalline material that rapidly converts blue light into white light, enabling data speeds of up to 2 GB/s. This innovation has the potential to replace traditional LEDs for energy-efficient lighting and enable new applications like VLC.
A new method for making green LEDs has been developed by researchers at the University of Illinois, enhancing their efficiency and brightness. By creating gallium nitride (GaN) cubic crystals grown on a silicon substrate, the team has achieved powerful green light emission for advanced solid-state lighting.
A study on sole-source LEDs found that increasing light intensity and quality negatively impacts nutrient content in Brassica microgreens. Growers can use the data to select beneficial lighting practices.
The rise of OLED displays could lead to shatterproof phones. Researchers are working to overcome challenges such as image retention and high costs, but if successful, the technology could vastly improve image quality and open up new possibilities for electronics design.
Researchers at The Australian National University have improved the performance of tiny lasers by adding impurities, increasing light emission efficiency. The discovery could lead to development of low-cost biomedical sensors, quantum computing, and a faster internet.
A new thermally activated delayed fluorescence (TADF) material has been developed, displaying emission of light in colors from green to deep-red through intersystem crossing. This breakthrough contributes to the development of inexpensive and highly efficient OLEDs.
Researchers have demonstrated that consumer-grade LED bulbs can be modified to serve as both light sources and receivers of signals, enabling the creation of a network of devices in a room. This technology has potential benefits for interconnecting IoT devices without threatening the scarce radio spectrum.
University of Utah researchers have developed a theory that adding light during the manufacturing process can reduce defects in semiconductors, leading to more efficient solar cells and brighter LED bulbs. This breakthrough could unlock the potential of materials previously deemed unusable, such as cadmium telluride and gallium nitride.
Exposure to LED light for just four hours can make milk taste like cardboard, while older milk remains at high quality for two weeks when shielded from LED exposure. Consumers overwhelmingly prefer older, fresh-looking milk over newer, LED-exposed milk.
Under certain conditions, electric eels attack by raising up out of the water and delivering a series of powerful electrical shocks, effectively deterring predators. This behavior is believed to provide the eels with an evolutionary advantage in defending their territory.
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 developed a compact, high-powered magnet to generate strong magnetic fields for cyclotron resonance experiments. This breakthrough enables routine measurements on a tabletop in a laboratory environment, facilitating rapid progress in semiconductor device development.
Continuous LED light significantly decreases nitrate content in preharvest lettuce, increasing nutrient contents. Researchers found that RB LED light was more effective than white LED light in facilitating lettuce growth, leading to enhanced free-radical scavenging activity and increased phenolic compound concentrations.
A study by researchers found that continuous spectrum LED lamps, specifically designed for horticultural use, outperform conventional white LEDs in terms of plant response and energy efficiency. The results showed a 26% increase in energy efficiency and significant increases in vegetative growth when light intensity was increased.
A biofeedback system has been developed to control photosynthetic lighting in controlled environment agriculture, allowing for efficient use of light by plants. The system successfully adjusted light levels based on the physiological performance of plants, achieving a wide range of energy conversion rates and reducing energy costs.
Researchers at Kyung Hee University propose a model to recycle lithium ion batteries into energy storage units for solar-powered LED lamps, reducing e-waste and providing job opportunities. The system can light up a room for about five hours each day, lasting approximately three years without maintenance.
Scientists develop hybrid quantum dot/tin disulfide material that enhances light-harvesting properties and boosts photocurrent response, paving the way for improved solar cells and photodetectors. The research demonstrates promise for designing better energy-conversion materials.
Researchers have developed a new way of attaching electronic screens to paper-based packaging, enabling the display of simple messages and potentially complex developments like countdown timers. The technology could transform the packaging industry by providing innovative ways for companies to communicate brand awareness.
Researchers at UCSB have identified specific defects in LED diodes that result in reduced efficiency, but not all defects are alike. The characterization of these point defects could lead to the fabrication of even more efficient and longer-lasting LED lighting.
Researchers at Michigan State University created a lighter, cheaper moth trap using LED lights and everyday materials. The new trap is effective but less abundant in insect capture compared to traditional mercury vapor black light traps.
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.
Conservation biologists at the University of Exeter found that attaching green LED lights to gillnets reduced sea turtle deaths by 64%, without affecting fish catch, in a small-scale Peruvian fishery. The study showed that the cost of saving one turtle was £24, making it a cost-effective solution.
The University of Bath has installed a new Nano-Lithography printing system, enabling the development of advanced manufacturing techniques for nano-engineered semiconductors. The system will accelerate research into high-efficiency LEDs and improve the quality of these materials.