Articles tagged with Light Emitting Diodes
Researchers found that a solid-state illuminator decreases nitrate concentrations by 44-65% while increasing beneficial nutrients. The technology allows for short-term preharvest treatment, making it suitable for northern countries with poor lighting conditions.
Researchers from Germany have developed a way to encode wireless broadband signals using desk lamps, exploiting synergy between illumination and information. The system uses visible-frequency wireless with all the bandwidth one could want, achieving record speeds of up to 230 Mbit/s with commercial LEDs.
Researchers create a high-speed optical system using multi-element transmitters and receivers for secure, low-interference communications in restricted areas like hospitals and aircraft. The system can transmit at gigabit per second speeds over gigahertz bands.
Researchers at the University of Utah have found that natural cavities in polymers can act like mirrors in light-emitting materials, generating 'random' lasers. This discovery could lead to new applications in cancer diagnosis and other fields.
Researchers at Northwestern University have developed compact mid-infrared laser diodes that generate more light than heat, achieving efficiencies of 53 percent. This breakthrough paves the way for applications such as remote sensing and hazardous chemical detection.
Researchers at Cornell University created a simple solar cell using a single-walled carbon nanotube, which converts light to electricity in an extremely efficient process. The device produces more electrical current with higher levels of photon energy.
Researchers have developed a non-invasive treatment combining high-intensity LEDs with green tea extract to reduce facial wrinkles. The study shows promising results, achieving smoother skin in one-tenth of the time it took for LED therapy alone.
Professor Christian Wetzel is working to develop efficient green LEDs to bridge the gap in color technology. His goal is to produce true white LEDs and enable widespread adoption of energy-efficient lighting solutions.
Researchers developed a process to create ultrathin, ultrasmall inorganic LEDs that can be assembled into large arrays on flexible substrates. These arrays enable general illumination, high-resolution displays, wearable health monitors, and biomedical imaging devices with see-through construction and mechanical flexibility.
Scientists at the University of Illinois have developed a light-emitting transistor that sets a new record for signal-processing modulation speed, reaching 4.3 GHz. By reconfiguring the device as a tilted-charge light-emitting diode, researchers were able to break the 7 GHz barrier.
Plant physiologists use UV LEDs to create darker, redder lettuce rich in antioxidants, potentially improving human health. The effect is most noticeable at specific wavelengths and increases with light intensity.
Researchers at Chinese Academy of Sciences developed a new type of LED made from inexpensive organic materials, producing twice as much light as normal LEDs. Their tandem structure achieved a CRI rating of nearly 70, promising further reduction in price and expansion into home and office lighting.
Pacific Northwest National Laboratory scientists have developed new materials that improve the power efficiency of blue OLEDs by at least 25 percent. These advancements aim to overcome major research challenges and provide a solution for large-scale applications in rooms and buildings.
Researchers found a reversible diode made from the material, allowing current flow in one direction under certain conditions and in the opposite direction under different conditions. The material also generates current when light falls on it, making it a potential candidate for future solar cells.
Gallium Nitride (GaN) LED lights could cut the proportion of UK electricity used for lighting from 20% to 5% if widely adopted, potentially saving eight power stations. GaN LEDs also offer long lifespan and environmental benefits over traditional bulbs.
The portable device is relatively inexpensive, replacing expensive diagnostic equipment with light-emitting diodes. It allows visually challenged individuals to access the Internet, view friends' faces, and express themselves through photography.
Researchers at Rensselaer Polytechnic Institute have developed a new type of LED with improved lighting performance and energy efficiency. The new polarization-matched LED exhibits an 18% increase in light output and a 22% increase in wall-plug efficiency.
Engineers have achieved a new record in efficiency of blue organic light-emitting diodes (OLEDs), which can produce high-quality white light similar to standard incandescent bulbs. The breakthrough paves the way for more efficient and affordable lighting solutions.
Researchers have discovered a way to produce brilliant white light using zinc oxide and sulfur, with potential applications for energy-efficient and safe illumination. The new material has been shown to convert invisible ultraviolet light into natural white light, offering advantages over current fluorescent bulbs and LEDs.
Researchers envision a 'revolution' in lighting with LEDs, promising cost savings of $1.83 trillion and reduced carbon emissions by 10.68 gigatons. Smart lighting applications could enhance healthcare, transportation, digital displays, and computer networking.
A new paper in Optics Express envisions a future with widespread use of LED lights, offering significant energy savings and environmental benefits. LEDs are predicted to save more than $1 trillion in energy costs over 10 years and lead to substantial reductions in carbon dioxide emissions.
A new, economical method allows LED manufacturers to obtain accurate measurements of LED brightness and color, enabling reproducible and comparable results. The method takes into account the temperature of the semiconductor chip inside the LED.
Researchers aim to create a high-speed wireless network using low-power LEDs, enabling faster data communication and greater security. The Smart Lighting ERC will focus on developing computer networking applications and testing the technology's potential for various industries.
Researchers from Sony and Max Planck Institute demonstrate bendable optically assessed organic light emitting displays for the first time. The new technology enables flexible computers, televisions, posters, and newspaper display technology, offering advantages over traditional projection displays and TVs.
Researchers successfully controlled an electrical current using the 'spin' within electrons, a step toward building plastic semiconductor switches. However, highly efficient organic LEDs may only convert up to 25 percent of electricity into light, contrary to earlier estimates.
The new silicon-based LED research has the potential to replace all incandescent and compact fluorescent bulbs, offering dramatic energy and environmental benefits. The Purdue team's breakthrough allows for efficient production on low-cost metal-coated silicon wafers, reducing costs by up to 20 times.
A new solar concentrator design developed by MIT engineers could significantly increase the efficiency of solar panels and reduce their costs. By using a mixture of dyes to concentrate sunlight, the system can boost electrical power obtained from each solar cell by a factor of over 40.
The National Institute of Standards and Technology (NIST) has developed the first two standards for solid-state lighting in the US, detailing color specifications and test methods for LED lamps and light fixtures. These standards aim to significantly reduce energy consumption and improve color rendering.
Scientists have successfully used quantum dots to deliver gene-silencing tools (siRNA) into cells, achieving 2% protein production compared to 13-51% with existing methods. The new approach is also five-to-ten times less toxic to cells.
A Rensselaer Polytechnic Institute student has developed a new type of LED that could allow for its widespread use in liquid crystal displays (LCDs), improving screen clarity and conserving energy. The polarized LED, invented by Martin Schubert, is expected to revolutionize the field of lighting technology.
Researchers at the University of Washington have developed a contact lens with an electronic circuit and light-emitting diodes, paving the way for potential applications such as virtual displays, improved vision correction, and enhanced gaming experiences. The device was tested on rabbits without adverse effects.
Tufts researchers are developing techniques to allow computers to respond to users' thoughts of frustration, boredom, or overwhelm. Functional near-infrared spectroscopy (fNIRS) technology is being used to monitor brain blood flow and provide real-time insight into user experiences.
Professor Andrew Steckl's innovative approach incorporates DNA from salmon sperm into light-emitting diodes, enhancing performance while reducing environmental impact. The technique involves trapping electrons longer, resulting in brighter colors and improved light efficiency.
Researchers developed a single-particle technique to study small portions of semiconductor material at the nanoscale. The study found that 'deep traps' are formed in plastic semiconductors, which can decrease efficiency and cause defects. This breakthrough could lead to improved devices made from these materials.
Researchers at the University of Illinois have developed microcavity plasma lamps that produce bright light with high efficiency, surpassing traditional incandescent and fluorescent lighting. The panels are lightweight, thin, and can be packed into a single panel containing over 250,000 individual lamps.
Researchers at NIST developed a batch fabrication technique to create nanowire LEDs emitting ultraviolet light, which is crucial for data storage and biological sensing devices. The new method yields reliable, stable devices with excellent thermal stability and operational stability.
The William J. von Liebig Center for Entrepreneurism and Technology Advancement has awarded $430,000 to nine research projects with potential for commercialization. These projects include thermoelectric devices, reconfigurable dynamic robots, protease detection systems, and online photo enhancement technology.
Researchers at UCLA have achieved a record-breaking 18 lumens per watt for red phosphorescent LEDs using a new combination of polymer-infused liquid, resulting in brighter, clearer pictures and slimmer profiles. The development aims to make future LED TVs cheaper while maintaining high image quality.
Researchers at the University of Manchester are developing low-cost LED lighting modules that can be used in buildings and on roads, offering a potential 25-50% reduction in energy consumption. The project aims to tackle thermal and electrical issues associated with high-powered LEDs.
A new fiber-based light source promises to improve the inspection of food, produce, paper, currency, recyclables and other products by providing a bright, rectangular beam of light. This design enables line-scan cameras to sort products at higher speeds with improved accuracy.
Researchers have created a material with a refractive index of 1.05, making it an ideal building block for anti-reflection coatings. The new coating could lead to more efficient solar cells, brighter LEDs, and smarter lighting systems by controlling light properties.
Scientists have created highly efficient infrared light-emitting diodes (LEDs) that can be used in night-vision devices, emitting a reddish-orange glow. The LEDs use a phosphorescent platinum porphyrin complex as a doping agent to improve efficiency and emit light for longer periods.
Engineers at UC San Diego synthesized p-type zinc oxide (ZnO) nanoscale cylinders, which transport positive charges and could pave the way for an inexpensive new kind of light emitting diode (LED). The development of these semiconducting materials may lead to more efficient LEDs and a wider range of nanodevices.
Van Voorhis is developing methods to simulate electron transfer and improve the efficiency of devices such as LEDs and optical displays. His research aims to create a larger portion of energy storage in artificial photosynthesis, potentially leading to more efficient solar energy storage.
The Cornell team created a diode using organic semiconductors with free ions, allowing for efficient light emission and current flow. This technology has the potential to create low-cost, flexible solar cells and displays on cloth or paper.
A team of Rensselaer researchers is working to improve the energy efficiency of green light-emitting diodes (LEDs) by doubling or tripling their power output. By leveraging the piezoelectric effect, they hope to develop a process to make higher-intensity green LEDs that convert electricity into light more efficiently.
Researchers at NIST have created LEDs that emit light in a specific direction, increasing brightness by up to 41% compared to conventional designs. The novel nanostructure may be cheaper and more effective for biomedical imaging applications.
Chromophores have been engineered to exhibit fast electron transfer, opening up new possibilities for nanoscale electronics. By linking long chromophores with short linkers, researchers can create materials that function on the nanoscale.
Researchers at UCLA Engineering have developed a novel approach to silicon devices that combines light amplification with a photovoltaic effect, enabling the generation of power normally wasted as heat. This breakthrough has significant implications for the photonics industry and the traditional stronghold of semiconductors.
NIST researchers have successfully grown gallium nitride alloy nanowires with intense ultraviolet and visible light emission. The wires' high light output and defect-free structure enable reliable room-temperature measurements, while their versatility makes them suitable for various devices, including sensors and transistors.
Researchers have developed carbon-based quantum dots that show less potential for toxicity and environmental harm. These dots can be used to create low-cost sensors for detecting explosives and biological warfare agents.
Researchers at MIT have created a new energy system that converts light into electricity, enabling more fuel-efficient cars. The system uses advanced materials and photonics to create intense light, which is then harnessed by photo diodes to power electrical systems.
Researchers at the University of Montreal have developed a high-performance OLED on a new electrode material, enabling flexible displays. The technology uses carbon nanotube sheets, which exhibit flexibility, transparency, and conductivity, making them suitable for various display and lighting applications.
Researchers at JILA use a novel laser technique to study semiconductor materials, revealing correlated oscillations that can aid in predicting emission frequencies. The approach, developed for probing molecular structure, offers new insights into electronic properties of semiconductors.
Researchers at Penn State have developed a system that uses white LEDs to transmit data wirelessly over power lines, achieving gigabit-per-second speeds. The system is more secure than traditional wireless methods due to light's ability to penetrate walls and avoid signal distortion.
Researchers at Vanderbilt University have discovered a way to make quantum dots produce broad-spectrum white light, similar to sunlight. The discovery uses 'magic-sized' nanocrystals that emit light without chemical treatment, offering a potential sustainable alternative to traditional lighting.
Engineers develop optoelectronic tweezers that can manipulate large numbers of single cells and particles, offering a practical advantage over existing methods. The device uses a photoconductive surface and light-emitting diode to create an electric field for particle manipulation.
Researchers at Rensselaer Polytechnic Institute are developing smart lighting sources with improved spectral power distribution, polarization, and color temperature to enable new functions in various fields. These innovations have the potential to reduce energy consumption, dependency on oil, and greenhouse gas emissions.
Researchers at Cornell University have developed a silicon device that can modulate light on a micrometer scale, enabling the integration of electronics and photonics. The device uses a ring resonator to filter out specific wavelengths of light, allowing for efficient switching between states.
Researchers at Los Alamos National Laboratory have successfully demonstrated electroluminescence from all-inorganic nanocrystal-based architecture. The new LEDs utilize colloidal quantum dots and emerging GaN manufacturing technologies to produce high-emission-efficiency, color-selectable light.