Articles tagged with Light Emitting Diodes
A new instrument at the Advanced Light Source enables simultaneous measurement of crystal structure and optical properties during perovskite synthesis. This allows for real-time monitoring of material quality and performance, leading to potentially more efficient solar cells.
Researchers reviewed the progress of Single-Emissive Layer White Light Emitting Diodes (SEL-WLEDs), highlighting their advantages in low cost, simple process, and material stability. The study proposes perovskite materials as a feasible path to commercialization.
The new system, using over-current driven LED lights, improves image brightness and color consistency, reducing motion blur and variability caused by sunlight. The prototype showed an average decrease of 85% in standard deviation for hue-saturation-value channels compared to auto-exposure settings.
Colloidal quantum dot technology enables infrared lasing at room temperature, paving the way for low-cost solution-processed and CMOS integrated lasing sources. The breakthrough discovery may facilitate fully integrated silicon photonics, enabling lower power consumption, higher data rates, and multi-spectral 3D imaging capabilities.
Researchers have developed a revolutionary wireless photoelectric implant that can control the activity of spinal neurons, enabling the study of neural function and the development of new treatments for neurological disorders. The breakthrough technology uses pulses of light to stimulate or inhibit specific spinal-cord neurons, potenti...
Researchers at KAUST developed bright red indium gallium nitride microlight-emitting diodes that emit light across the entire visible-light spectrum. The devices have a high output power of 1.76 milliwatts per square millimeter, outperforming previous devices.
Researchers at the Institute for Basic Science have developed a foldable quantum dot LED that can be transformed into various complex 3D structures, such as butterflies and pyramids. The technology employs selective laser-etching to create precise curvature lines, allowing for stable light-emitting performance even after repeated folding.
A new study found that global light pollution has increased significantly over the past 25 years, with the true increase potentially being much higher. The study, led by the University of Exeter, reveals that the transition to solid-state LED technology has masked the impact of light pollution in many regions.
Researchers generate circularly polarized light at room temperature, a breakthrough for optical quantum information processing. The device uses strained semiconductors to produce twisting 'chiral' valley-polarized light, promising vast data storage capabilities.
Researchers have developed a stable perovskite nanocrystal material for LEDs, enabling bright and long-lasting light sources. The new material is made using a metal-organic framework structure, which keeps the nanocrystals separate and prevents degradation.
The new technology uses a 'tuneable' infrared LED that can detect multiple materials, including bacteria in meat and potentially lethal gases. It has the potential to improve safety for firefighters, miners, and military personnel, as well as be integrated into smartphones and other devices.
Researchers from University of Surrey and Cambridge have identified promising semiconducting materials for next-generation LED-based data communications. These organic semiconductors, colloidal quantum dots, and metal halide perovskites show potential for low-power and cost-effective solutions.
A new study found that LED streetlights have a detrimental impact on local insect populations, with moth caterpillar numbers being 52% lower under LED lighting than in unlit areas. The study suggests that this is due to female moths laying fewer eggs in habitats illuminated by streetlights.
Researchers developed a new memory device that uses perovskite to store and visually transmit data, achieving parallel and synchronous reading of data through electrical and optical methods. The device has the potential for numerous applications in next-generation technologies.
A study conducted at a Brazilian university found that treatment with curcumin and light reduces parasite load and eliminates Leishmania parasites completely. Curcumin showed good distribution in macrophages and reduced amastigotes' viability, changing their mitochondrial activity.
A new Science article assesses the technological progress of colloidal quantum dots, which have become industrial-grade materials for a range of technologies. Advances include first demonstration of colloidal quantum dot lasing, discovery of carrier multiplication and pioneering research into LEDs and luminescent solar concentrators.
Researchers at the University of Basel have developed new luminescent manganese complexes with promising properties, including improved efficiency and stability. These findings offer a potential solution for more sustainable energy production and could lead to the creation of water-soluble variants for medical applications.
Researchers from University of Tsukuba discovered that exposure to organic light-emitting diodes (OLEDs) before sleep reduces negative health effects on energy metabolism. OLEDs emit less blue light, leading to decreased energy expenditure and core body temperature during sleep.
The ETRI team developed the world's first next-generation display technology, combining transfer-bonding processes into one process. This innovation reduced equipment investment and process time to 1/10, as well as material and repair costs by 1/100.
Researchers use cross-correlation noise spectroscopy to identify crucial electrical noise signals in silicon solar cells, pinpointing physical processes causing energy loss and lower efficiency. The technique allows for precise measurement of noise and removal of detector noise, enabling the detection of smaller noise signals.
Researchers at Linköping University developed a method to create structural colours for use in reflective colour displays, enabling manufacturing of thin and lightweight displays with high energy-efficiency. The new method uses electrically conducting plastics and can produce all colours in the visible spectrum.
Researchers at Harvard John A. Paulson School of Engineering and Applied Sciences developed a single metasurface that can tune different properties of laser light, including wavelength, without additional optical components. This opens the door for lightweight and efficient optical systems for various applications.
A five-nanometer-thick layer of silver and copper outperforms conventional indium tin oxide in OLED displays, freeing up 20% more light. This innovation enables devices to maintain brightness while using less power, extending battery life and making displays more energy-efficient.
Researchers at KAUST developed a new molecular coating that significantly enhances the performance of organic photovoltaic cells, outperforming current materials like PEDOT:PSS. The coating increases efficiency by reducing electrical resistance, improving hole transport, and allowing more light to pass through.
Researchers develop new methodology to study lead halide perovskites' photophysics, revealing the limitations of existing theories. The method provides a complete representation of the material's photophysical processes, allowing for the examination of theory validity and exploration of new explanations.
Researchers at the University of Cambridge have developed a new technique that enables the creation of ultra-bright, flexible LEDs with improved efficiency and low cost. By swapping one out of every thousand atoms, they tripled the luminescence of halide perovskites, which could be useful for low-cost printable and flexible LED lighting.
A University of Houston research team creates a unique class of luminescent materials called phosphors that absorb violet LED's single-color emission and convert the light to cover the majority of the visible spectrum. The new LED bulb emits less blue light, reducing health concerns associated with overexposure.
Researchers have designed optical rectennas that can capture excess heat and turn it into usable electricity, achieving efficiencies 100 times higher than previous tools. The devices use a phenomenon called resonant tunneling to pass through solid matter without losing energy.
Researchers from NUS and TU have developed a method to harness WiFi signals using spin-torque oscillators, converting them into energy to power small electronics. The device successfully harvested energy from WiFi-band signals to light up an LED wirelessly without using any battery.
Researchers at King Abdullah University of Science & Technology (KAUST) have developed a more efficient red micro-LED, emitting light with high color purity and quantum efficiency. The breakthrough could lead to the creation of full-color displays using just a single semiconductor.
Researchers at UC Riverside are developing a new approach to convert light falling on atomically thin semiconductor materials into electricity. By twisting these materials, they aim to create new sensing capabilities for layered and stacked monolayer semiconductors.
Researchers developed a new type of LED that reduces blue light emission, resulting in a warm white light similar to natural sunlight. The new phosphor compound minimizes the intensity across blue wavelengths, improving sleep quality and reducing eye troubles.
Tandem micro-LEDs featuring stacked red, green, and blue micro-LEDs enable full-color displays. This method alleviates the issues of reduced LED size performance.
Researchers used advanced spectroscopy and electronic transport techniques to determine charge accumulation and dynamics in resonant-tunneling diodes. The study aims to develop novel RTDs with optimized charge distribution to enhance photodetection efficiency or minimize optical losses.
Chinese scientists summarize the latest progress of CPL-active organic micro-/nano-structures, which can reduce energy loss in displays and photonic technologies. The review discusses design principles, external stimuli regulation, and potential applications, including OLEDs, optical information recording, and sensing technologies.
The study reveals indium atoms are randomly distributed in low-indium content InGaN and partially phase-separate in higher-indium content material. The findings advance understanding of atomic microstructure and its effect on LED performance, enabling future research to optimize compositional fluctuations.
Quasi-2D perovskites offer self-assembled multi-quantum-well structures and large exciton binding energy, enabling high carrier density and efficient radiative recombination. Researchers are exploring composition and structure engineering to achieve pure red and blue LEDs with improved performance.
Researchers developed a non-invasive methodology using artificial intelligence to analyze crop seed quality. The technique uses light-based technology and machine learning to identify immature or poor-quality seeds, avoiding the need for destructive germination tests and providing more accurate results in less time.
Researchers have created a highly efficient red-emitting phosphor using glass crystallization, overcoming the limitations of traditional LEDs. The new phosphor enables the production of high-power warm white lighting with excellent optical properties.
Researchers found that using amber-colored filters on 'warm white' LED lamps reduces insect attraction to nocturnal lighting in a tropical forest. Insects play crucial roles as pollinators, regulators, decomposers, and food sources; using filtered LEDs can mitigate the negative impacts of ALAN on wildlife.
Researchers have developed a semiconductor nanogroove enhanced millimeter and terahertz wave detector, achieving a noise equivalent power 2-3 orders superior to state-of-the-art detectors. The device operates at room temperature with fast response speed and broad spectral band detection.
Researchers at NREL and University of Utah developed a spin-polarized LED using metal-halide perovskites, enabling room-temperature operation without magnets. This breakthrough has broad implications for applications like quantum computing and bioencoding.
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.
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.
Researchers have developed a microscopy technique that combines ultrafast electron manipulation with sub-nanometer photon detection. This allows for the investigation of quantum systems, sensing, and control, opening new doors for nanoscale science and technology.
Researchers successfully demonstrated electroluminescence from a silicon-germanium device, marking a key step towards the development of a silicon-based laser. The achievement could have significant implications for the large-scale use of terahertz radiation in fields such as medical imaging and wireless communication.
Researchers developed a first wearable sensor to continuously measure bilirubin, pulse rate, and blood oxygen saturation in real-time. The device aims to improve quality of phototherapy and patient outcomes in neonatal care.
Researchers developed a technique to manufacture fiber electronic components with desired electrode structures by wrapping electrodes around thread. The resulting fiber photodiodes can detect light and measure the wearer's pulse from their fingertips.
Dresden researchers have developed a novel device concept combining vertical organic permeable base transistors and OLEDs, achieving high efficiencies and low driving voltages. The new strategy paves the way for highly-efficient flexible displays with simple pixel designs.
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.
Researchers have developed a temporary tattoo using organic light-emitting diodes (OLEDs) that can emit green light. The technology has the potential to be combined with other electronics for various applications, including fashion, sports, and healthcare, such as detecting dehydration or signaling expiry dates.
Optical systems can combine light by multiplying wave functions instead of adding them, allowing for the solution of nonlinear problems. The authors suggest guiding system trajectories towards solutions by temporarily changing coupling strengths.
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.
Isamu Akasaki, Shuji Nakamura, Nick Holonyak Jr, M. George Craford, and Russell Dupuis receive the prestigious award for their groundbreaking work in LED lighting technology. The prize acknowledges the significant reduction of energy consumption and carbon dioxide emissions through sustainable solid-state lighting.
Researchers at NC State University developed a new approach to design photonic devices, controlling light direction and polarization from thin-film LEDs. This technology paves the way for lighter, more efficient VR and AR headsets with improved efficiency and clearer views of the real world.
Scientists have developed novel, non-toxic organic emitters for the near-infrared range, achieving high external quantum efficiencies in OLEDs. The new materials surpass previous reports by demonstrating improved radiative rates and reduced aggregation quenching.
Researchers developed a microelectromechanical systems (MEMS) optical scanner that enables better road safety by adjusting the driver's visibility based on speed and traffic environment. The system provides improved visibility, especially for pedestrians, and reduces glare from oncoming vehicles.
Researchers from Far Eastern Federal University and international partners developed ceramic phosphors that can be applied in-ground and aerospace technologies. The new materials produce compact energy-efficient white light-emitting diodes (wLEDs) and high-power systems, with reduced operating temperatures.
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.
Scientists created a method for calculating optimal parameters of liquid crystal displays (LCDs) to enhance viewing angles without compromising image quality. The new technology uses diffraction optical elements with specific surface microreliefs to expand the angle of view, allowing for better color rendition and high resolution.