Articles tagged with Light Emitting Diodes
A new technology allows for the creation of incandescent bulbs that can achieve efficiencies as high as 40 percent, outperforming current CFLs and LEDs. The breakthrough involves a two-stage process where waste heat is captured and re-emitted as visible light, resulting in a threefold improvement over traditional designs.
A study by Purdue University researchers found that LED lighting did not negatively affect greenhouse tomato fruit quality and demonstrated a potential alternative to overhead HPS supplementation. Physicochemical measurements showed slight variation among fruits grown under different lighting regimes.
A team of engineers has created gallium nitride (GaN) power diodes with record-low defect concentrations, enabling efficient control and distribution of electricity. The discovery is significant as GaN materials are notorious for their defects and reliability issues, but the new devices show promise in addressing these challenges.
Researchers at TU Wien developed a nanoscale device that allows light to propagate in only one direction, breaking the symmetry of traditional optics. By coupling alkali atoms to ultrathin glass fibers, they achieved high transmission rates for light traveling in one direction while blocking it in the other.
Engineers tested ATLAS's precision by simulating launch vibrations and temperature changes to ensure accurate beam alignment. The automatic steering mechanism adjusts the laser beams to hit specific spots on Earth, generating a precise electrical signal.
Scientists developed implantable probes with tiny LEDs that can control and record individual neurons, shedding light on neural communication. The new technology could lead to breakthroughs in understanding and treating neurological diseases like Alzheimer's, which affects hundreds of millions worldwide.
Researchers at MIT have developed a stretchy hydrogel material that can incorporate temperature sensors, LED lights, and drug-delivering reservoirs. The hydrogel can sense changes in skin temperature and release medicine as needed, making it a potential treatment for burns or other skin conditions.
A team of engineers at UC Berkeley has developed a method to fix defects in monolayer semiconductors, increasing photoluminescence quantum yield by 100-fold. The technique uses an organic superacid to create defect-free material for applications such as transparent LED displays and high-performance transistors.
A study investigates how to control noise in quantum dot LEDs by modulating bias current, leading to stabilized light sources suitable for optical telecommunications. The researchers found that spiking competition of quantum dots enhances self-feedback and affects noise perturbation.
Researchers from Florida State University have created a new type of high-performing LED using organometal halide perovskites, which outshines traditional LEDs by about 25 times. The material is also quick and easy to produce, reducing production costs.
Researchers at the University of Utah have successfully created LEDs from food and beverage waste, reducing toxic waste and offering a cost-effective alternative. The development utilizes carbon dots made from discarded pieces of tortilla and soft drinks, eliminating concerns over toxic elements.
Researchers at the University of Oregon have developed a new method to create nanohoops, tiny organic circular structures that can efficiently absorb and distribute energy. These nanostructures show promise in solar cells, organic light-emitting diodes, and medical diagnostics.
Researchers found polarization-induced energy level shifts on the edges of organic molecular systems differ significantly from the rest of the material. This affects interface properties and may require consideration when designing components.
Researchers have developed a polymer blend that significantly improves light output from LEDs by manipulating hole-mobility and exploiting the difference in energy levels of the polymers. The optimized device achieves an ultrahigh efficiency of approximately 27 candelas per amp, outperforming a similar device using only Super Yellow.
The team uses multiwall carbon nanotubes and tiny rectifiers to create an antenna that captures light from the sun or other sources, producing a small direct current. The efficiency of the devices is below one percent, but the researchers hope to boost it through optimization techniques.
Researchers at Disney Research have developed a networking technology that enables LED lights to communicate with each other and the Internet using visible light signals. The technology has the potential to create smart environments and enable IoT applications, such as remote monitoring of objects.
Researchers at Northwestern University have developed a solution to create stable carbon nanotube-based integrated circuits using newly designed encapsulation layers. These layers protect the sensitive devices from environmental degradation, enabling reliable operation for years or even decades.
Researchers at Pohang University of Science and Technology have made significant advancements in organic light-emitting diodes (OLEDs) for solid-state lighting. The team developed flexible electrodes using graphene, conducting polymers, and silver nanowires, which demonstrated good electrical, optical, and mechanical performance.
A Florida State University engineer has developed a highly efficient and low-cost LED technology using organic and inorganic materials. The new material requires only one layer to create the desired product or effect, making it simpler to manufacture than existing products.
Researchers at National Chiao Tung University developed a highly flexible white light LED that uses pre-existing technologies, allowing easy replication and build-on the platform. The device demonstrated high efficiency, durability, and flexibility, making it suitable for wearables and non-flat surfaces.
Researchers have developed a more affordable and eco-friendly white LED that can cut down the world's energy consumption. By using common earth-abundant metals and organic luminescent molecules, they created a controllable white light from LEDs, reducing costs by up to 90%.
The new technology uses a continuous flow chemical reactor and microwave heating to produce nanoparticles that emit light with precise color control. This could lead to improved LED lighting systems with reduced waste and toxicity, cutting the nation's lighting bill in half.
Researchers have created a unique antenna that collects unused blue photons from sunlight, converting them into usable energy for silicon-based solar cells. This innovation has the potential to significantly increase solar cell efficiency, making them more affordable and environmentally sustainable.
Scientists have developed a brain-computer interface that uses electroencephalogram (EEG) signals to control an exoskeleton. The system allows users to move their limbs by staring at specific LED lights, and has the potential to aid people with motor neuron diseases or spinal cord injuries.
Scientists have developed a biodegradable nanogenerator made with DNA that can capture and convert everyday motion into electrical power. The flexible device has been successfully tested, lighting up multiple LEDs with gentle tapping, and offers a promising solution for reducing e-waste and increasing portable electronics' battery life.
The Dartmouth College team developed a system called LiSense that reconstructs human postures continuously and unobtrusively using VLC. The researchers overcame two key challenges to realize shadow-based human sensing, enabling a new passive health and behavioral monitoring paradigm.
A new technology developed by UC Berkeley researchers uses light to accelerate the heating and cooling of genetic samples, greatly expanding clinical and research applications. Results can now be obtained in minutes instead of hours, revolutionizing DNA diagnostics.
Researchers at Purdue University found that LED sole-source lighting is comparable to or better than traditional supplemental lighting for growing high-quality bedding plant seedlings. The study suggests using LEDs with a specific blue light spectrum can promote compact, desirable plant growth.
Researchers found that supplemental lighting with red and blue LEDs can increase anthocyanin synthesis and pigmentation of lettuce crops, leading to improved color and increased market value. This cost-effective practice allows growers to manipulate leaf color in 5-7 days without negatively affecting growth or morphology.
Researchers at Arizona State University have created a novel nanosheet that emits light of all visible colors, producing a white laser. This technological advance brings lasers closer to being a mainstream light source, potentially replacing LEDs in various applications.
Researchers at Duke University have developed a superfast fluorescence device that can emit light over 90 billion gigahertz, breaking the current speed record. This breakthrough technology has the potential to revolutionize optical computing and communication.
A team of scientists from NUS discovered that blue LEDs can effectively kill major foodborne pathogens, especially when combined with chilling temperatures and mildly acidic conditions. This technology has the potential to replace chemical treatments for preserving acidic foods.
A Purdue University study reveals that targeting plants with red and blue LEDs offers an energy-efficient solution for growing crops in space. The research found that leaf lettuce thrived under a 95-to-5 ratio of red and blue light-emitting diodes, using about 90% less electrical power per growing area than traditional lighting.
Researchers at the Niels Bohr Institute have discovered a way to design nanowires for LEDs that use less energy and provide better light. By using X-ray microscopy, they can pinpoint the optimal structure of these tiny wires, leading to more efficient core/shell designs.
Scientists have developed a novel battery that uses light to produce power, utilizing titanium nitride for the anode. The 'photo battery' demonstrated high stability and safety, discharging electric current within 30 seconds under normal indoor lighting.
Researchers at Hiroshima University have developed a next-generation illumination device using a silicon quantum dot-based hybrid light-emitting diode. The new LED exhibit higher current and optical power densities, and features an active area 40 times larger than traditional commercial LEDs.
Researchers from IBS and Seoul National University created ultra-thin wearable QLEDs with resolutions approaching 2,500 pixels per inch. The technology enables the display of high-definition full-color displays on human skin.
A novel liquid crystal technology allows displays to flip between transparent and opaque states, increasing visibility while reducing the need for power. The new design remedies previous problems with scattering and absorption, providing a faster response time and improved energy efficiency.
Researchers at Oregon State University have invented a technology that can increase WiFi bandwidth by 10 times, reducing congestion in crowded locations and homes with multiple devices. The system uses inexpensive components and integrates with existing WiFi systems, enabling faster data transfer rates up to 100 megabits per second.
Researchers have designed an organic electronic device with record-breaking ultra-long charge carrier lifetimes, opening up possibilities for new classes of devices such as sensitive photo detectors and flexible memory elements. This breakthrough could lead to more efficient solar cells, low-carbon electricity generation, and reduced e...
Researchers are testing light therapy on brain function in veterans with Gulf War Illness, using red and near-infrared light to improve blood flow and stimulate damaged brain cells. The study aims to determine if this therapy can be a valuable adjunct to standard cognitive rehabilitation.
Researchers at Northwestern University have successfully increased molybdenum disulfide's light emission by twelve times by combining nanotechnology, materials science, and plasmonics. This breakthrough enables the material to be used in light emitting diode technologies and has potential applications in solar cells and photodetectors.
A team of chemists from the University of Wisconsin-Madison has developed a method to precisely order molecules in organic glasses, leading to more efficient and durable portable electronic devices and potentially new generations of solar cells. This breakthrough could result in displays that produce more light using less energy.
Researchers at the University of Basel have made significant advancements in developing next-generation lighting technologies. The team has successfully created light-emitting electrochemical cells (LECs) with remarkable lifetimes exceeding 2500 hours, paving the way for a more efficient and cost-effective alternative to traditional LEDs.
Researchers in California and Japan develop OLEDs with finely patterned structures, producing bright, low-power light sources. The key finding is confining charge transport and recombination to nanoscale areas, extending electroluminescent efficiency by almost two orders of magnitude.
Berkeley researchers create nano-sized optical antenna that boosts spontaneous light emission by 115 times, enabling faster LED technology for microchips and alternative applications. The innovation has the potential to replace lasers for short-distance optical communications.
Researchers at University of Manchester and University of Sheffield create see-through and efficient electronic devices using graphene and related materials. The new technology enables the creation of light-emitting devices that are incredibly thin, flexible, durable, and semi-transparent.
Researchers grew large, pure perovskite crystals and studied how electrons move through the material as light is converted to electricity. The study identifies the bar for ultimate solar energy-harvesting potential of perovskites and shows that progress is slated to continue without slowing down.
Researchers at Brookhaven National Laboratory developed a method to create an antireflective surface on silicon solar cells using self-assembled nanotextures inspired by the structure of moths' eyes. The resulting surface reduces reflections and improves sunlight conversion, outperforming state-of-the-art coatings by up to 20%.
A new Yale-developed laser reduces speckle contrast in full-field imaging, enabling brighter and clearer images. The technology combines traditional laser brightness with LED-like properties, addressing a significant barrier in biomedical imaging and microscopy.
Scientists at UCL have discovered the root of the problem in making blue LEDs by examining gallium nitride's unusual behavior using sophisticated computer simulations. The study reveals that doping with magnesium is necessary to achieve the desired properties, but the complexity of the process was previously unknown.
Researchers at UC Berkeley have developed a new organic optoelectronic sensor that can accurately measure blood-oxygen levels and is thin, flexible, and disposable. The device uses red and green light to detect changes in oxygen saturation levels, making it potentially cheaper and more convenient than conventional pulse oximeters.
Researchers investigated GaN-based LED structure irradiation with protons and found increased resistance in p-type GaN layers compared to n-type. The observed increase is attributed to lower initial carrier density in p-type GaN, resulting from inadequate doping technology.
Scientists develop a thermoresponsive coating that changes the color of white LEDs when dimmed, creating a warmer glow. This innovative technology uses liquid crystal and polymeric materials to create a temperature-dependent shift in light emission.
A team of researchers from Johns Hopkins Medicine has discovered a novel blood vessel receptor that causes relaxation in response to light. This finding may lead to the development of new therapeutic options for vascular diseases, such as Raynaud's phenomenon.
Researchers are experimenting with smart spaces that track users' gestures and separate shadows from light, enabling a continuous flow of data wirelessly. The integrated visible light communication project aims to bridge the gap in VLC's practical systems and networking problems.
Researchers at Washington University in St. Louis have developed a method to reverse optical loss and increase laser intensity by modulating loss in the system. By adding loss to a laser system, they achieved energy gains and demonstrated new nonlinear phenomena.
Scientists have developed a new family of materials for making household LED bulbs without using rare earth elements, which are increasingly expensive. These materials, made from copper iodide, offer a warm white glow and low-cost solution process, showing significant promise for general lighting applications.
Researchers have developed a new type of energy-efficient flat light source using highly crystalline single-walled carbon nanotubes as field emitters, demonstrating potential for low-power lighting devices. The device has a brightness efficiency of 60 Lumen per Watt and requires only 0.1 Watt of power consumption.
Duke University researchers have developed a way to increase the photon emission rate of fluorescent molecules, reaching record levels. This breakthrough has significant implications for ultrafast LEDs and quantum cryptography, enabling secure communication that could not be hacked.