Diodes
Articles tagged with Diodes
An advance in single-chip, energy-efficient LEDs
Researchers at The University of Osaka developed a new LED structure that generates circularly polarized light from a single chip, reducing energy-conversion loss. This advancement could support smaller and more energy-efficient optical devices for next-generation technologies.
Engineers improve infrared devices using century-old materials
Researchers at Stanford University have developed a promising approach to using well-studied semiconductors to improve infrared light-emitting diodes and sensors. The new technology has the potential to lead to smaller, sleeker, and less expensive infrared devices with improved defect tolerance.
Real-time single-event position detection using high-radiation-tolerance GaN
A high-radiation-tolerance GaN detector was fabricated to enable real-time two-dimensional position detection of individual alpha particles and xenon heavy ions. The detector exhibited stable operation at radiation levels significantly higher than those tolerated by conventional Si-based detectors.
Sculpting complex, 3D nanostructures with a focused ion beam
Researchers have developed a new method to fabricate three-dimensional nanoscale devices from single-crystal materials using a focused ion beam instrument. They created helical-shaped devices that behave like switchable diodes, allowing electricity to flow more easily in one direction than the other.
Chemists design OLEDs that electrically flip the handedness of light
Researchers at the University of Oxford have discovered an approach to electrically switch organic LEDs to emit either left- or right-handed circularly polarized light. This could lead to new applications in displays, secure communication systems, and quantum technologies.
Korean researchers’ single memristor replaces both the driving transistor and storage capacitor in micro-LED
A team of Korean researchers has successfully integrated a single memristor into micro-LED pixels, replacing the traditional driving transistor and storage capacitor. This innovation enables more efficient and easier-to-build displays with improved brightness and color accuracy.
AC instead of DC: A game-changer for VR headsets and near-eye displays
Developed using alternating current power, single-contact nano-LEDs simplify fabrication and improve quantum efficiency for near-eye display applications. The technology has potential for smaller, more efficient devices with enhanced visual experiences.
Micro-LEDs could power next-gen screens
Researchers at Texas A&M University are working to overcome manufacturing hurdles for micro-LED displays, which use inorganic materials to create more robust and longer-lasting screens. The technology has potential for applications in virtual reality, augmented reality, and flexible displays.
Room-temperature terahertz device opens door to 6G networks
Researchers at Nagoya University have successfully developed a resonant tunnel diode that operates at room temperature using Group IV semiconductor materials. This breakthrough paves the way for terahertz wireless components that can deliver unprecedented speed and data handling capacity with superior energy efficiency.
OLED materials have potential new uses in detecting pesticides for the farming industry
Researchers are exploring how fluorescent OLED materials can detect pesticide residue and herbicides in food production, addressing concerns in Brazil. The project aims to develop sensors that respond with light when interacting with pesticides, enabling early detection and reducing contamination.
Phase-regulated FACsPbI3 films via triple-source thermal co-evaporation enable high-efficiency near-infrared perovskite LEDs
Researchers introduced a novel approach for fabricating high-performance near-infrared perovskite light-emitting diodes (NIR-PeLEDs) using triple-source thermal co-evaporation. This strategy directly forms the black-phase α-FACsPbI3 perovskite, overcoming phase instability and surface roughness issues.
OLEDs light the way to faster longer-distance wireless communication
Researchers have developed OLED-based systems that achieve data rates of up to 4.0 Gbps over 2 meters and 2.9 Gbps over 10 meters, surpassing previous records. The breakthrough uses a stable organic compound called dinaphthylperylene to balance brightness and speed.
Scientists develop deep-blue LEDs expected to greatly enhance general lighting
A Rutgers-led team creates a new copper-iodide hybrid emitter material to generate ultra-bright, stable, and eco-friendly deep-blue light in LED devices. The material's high photoluminescence quantum yield and robustness make it an attractive alternative for improving blue LED technologies.
Uncovering the role of spacers in advancing portable, low-voltage OLEDs
A nanometer-thin spacer layer has been inserted into exciplex upconversion OLEDs (ExUC-OLEDs) to improve energy transfer, enhancing blue light emission by 77-fold. This design enables the use of previously incompatible materials, paving the way for lightweight, low-voltage, and more flexible OLEDs.
A new model to accurately develop better OLEDs
A new model details the kinetics of exciton dynamics in OLED materials, enhancing lifetime and accelerating material development. The findings have potential to improve fluorescence efficiency, leading to more advanced OLED devices.
Bidirectional 1200 V GaN switch with integrated free-wheeling diodes
Fraunhofer IAF presents a bidirectional 1200 V GaN switch with integrated free-wheeling diodes, enabling more efficient power electronics for energy generation and mobility. The switch can be used in grid-connected power converters and electric drive systems.
Conformal radiation-type programmable metasurface for agile millimeter-wave OAM generation
Researchers developed a conformal programmable metasurface that generates Orbital Angular Momentum (OAM) waves at millimeter-wave frequencies without external spatial excitation. The design mitigates feed leakage radiation and realizes low-profile configuration, enabling next-generation wireless communication and space-based applications.
IEEE researchers provide mathematical solutions to study 2D light interaction in photonic crystal lasers
Researchers derived 2D coupled wave equations for photonic crystal surfaces, aiding the development of efficient laser devices. The findings established parallels between TM and transverse electric polarisation behaviours, offering unique advantages in certain configurations.
‘Living’ electrodes breathe new life into traditional silicon electronics
A team at Osaka University discovered that temperature-controlled conductive networks in vanadium dioxide enhance the sensitivity of silicon devices to terahertz light. The researchers created 'living' microelectrodes from VO2, which selectively enhanced the response of silicon photodetectors.
Revealing the “true colors” of a single-atom layer of metal alloys
Researchers demonstrate that light can interact with a single-atom layer of thallium-lead alloys, restricting spin-polarized current flow to one direction. This phenomenon enables functionality beyond ordinary diodes and paves the way for ultra-fine two-dimensional spintronic devices.
Researchers demonstrate self-assembling electronics
A new technique has been demonstrated for self-assembling electronic devices, enabling faster and less expensive production. The method uses a directed metal-ligand reaction to create semiconductor materials with tunable properties.
Advancing biomedical diagnostics: Compact photoacoustic sensing instrument for breast tissue characterization
Researchers developed a compact, cost-effective PA sensing instrument for biomedical tissue diagnosis, showcasing its potential to streamline sampling processes and improve diagnostic accuracy for breast disease. The instrument successfully differentiated various tissue types based on quantitative spectral parameters.
Building images photon-by-photon to increase the information content provided by microscopes
Researchers developed a compact microscope using a single photon avalanche diode array detector, enabling super-resolution imaging with improved signal-to-noise ratio and spatial resolution. The system also combines fluorescence lifetime measurements for enhanced structural specificity.
Light it up: reimagining the optical diode effect
Researchers at Osaka Metropolitan University have discovered a magnetoelectric antiferromagnet LiNiPO4 that exhibits large nonreciprocal absorption of light. The material's unique property allows for the switchable optical diode effect, potentially enabling more compact and efficient optical isolators.
High-temperature superconductors, with a twist?
A Harvard University research team has demonstrated a new strategy for making and manipulating cuprate superconductors, clearing a path to engineering new forms of superconductivity. The team created a high-temperature, superconducting diode made out of thin cuprate crystals using a low-temperature device fabrication method.
Examining the superconducting diode effect
A team of researchers reviewed the superconducting diode effect, which enables dissipationless supercurrent flow in one direction. The study highlights potential applications for quantum technologies in both classical and quantum computing.
Tough memory device aims for space missions
Gallium oxide-based flash memory device demonstrates high performance and stability in extreme temperatures and radiation, retaining data for over 80 minutes. The team aims to improve device properties through further material quality and design advancements.
Harnessing the power of light: Advancements in photonic memory for faster optical computing
A breakthrough in photonic memory has been achieved, enabling fast volatile modulation and nonvolatile weight storage for rapid training of optical neural networks. The 5-bit photonic memory utilizes a low-loss PCM antimonite to achieve rapid response times and energy-efficient processing.
New superconducting diode could improve performance of quantum computers and artificial intelligence
A University of Minnesota team developed a new superconducting diode that is more energy efficient and versatile than past models. The device can process multiple electrical signals at once and has gates to control the flow of energy, which could enable faster quantum computers for industry use and enhance AI performance.
Technology advance lays groundwork for OCT eye imaging at home
Researchers have developed a custom OCT setup that incorporates a vertical cavity surface emitting laser (VCSEL) diode, which could increase access to OCT imaging and help catch eye problems early. The system performed well in imaging the eye of a healthy volunteer and showed potential for use in biometric eye scanner systems.
Data compression scheme facilitates measurement of blood flow to the brain
Researchers develop innovative data compression scheme to facilitate multispeckle diffuse correlation spectroscopy with high pixel resolutions, enabling non-invasive measurement of brain blood flow. The scheme uses field-programmable gate array compression to alleviate computational burdens and expand the use of SPAD cameras in biomedi...
This ‘Harry Potter’ light sensor achieves magically high efficiency of 200 per cent
Researchers at Eindhoven University of Technology have developed a photodiode with sensitivity exceeding 200%, using green light and a double-layered cell design. This breakthrough enables the device to detect weak light signals, making it ideal for medical purposes, wearable monitoring, and machine vision applications.
A greener internet of things with no wires attached
A new form of thin-film device technology using alternative semiconductor materials could contribute to a more sustainable IoT. Wireless power harvesting from the environment using photovoltaic cells and RF energy harvesters is being explored.
Protons fix a long-standing issue in silicon carbide electronics
Researchers from Nagoya Institute of Technology found a feasible solution to prevent bipolar degradation in 4H-SiC semiconductor wafers using proton implantation. The technique pinches down partial dislocations in the crystal structure, preventing stacking faults and enhancing device reliability.
New material will make locally flexible diodes possible
Researchers at Technical University of Munich discovered a material that can be n- or p-conducting by changing the temperature, enabling locally flexible diodes. The material, Ag18Cu3Te11Cl3, displays the desired effect in room temperature ranges.
Researchers demonstrate new, more energy-efficient devices using gallium nitride
Researchers have developed a new technique to dope gallium nitride (GaN), creating high-power electronic devices with reduced energy loss and increased efficiency. This breakthrough enables the use of GaN in compact power electronics for sustainable infrastructure, such as smart grids.
With superconducting diodes, scholars advance work toward ultra-efficient quantum electronic devices
Researchers have demonstrated a prominent superconducting diode effect in a single two-dimensional superconductor using graphene. This breakthrough has significant implications for the study of complex physical behavior in twisted tri-layer graphene and could form the basis for ultra-efficient lossless quantum electronic devices.
When light is the switch: nanometric photodiodes to study the activity of neurons
Researchers developed nanometric photodiodes that can bind to nerve cell surfaces and activate them with infrared light, allowing for selective stimulation of individual neurons. This technology has the potential to study the nervous system in-depth and develop targeted therapies for neurological diseases.
Discovery of the one-way superconductor, thought to be impossible
Scientists at Delft University of Technology have discovered one-way superconductivity using 2D quantum materials, enabling superconducting computing and reducing energy loss. This breakthrough could lead to faster electronics, greener IT systems, and significant energy savings.
Beam me up to 5G, Schottky
An international team of scientists has developed an organic semiconductor that can operate in the 5G frequency range, with a structure featuring ultralow capacitance and resistance. The innovation paves the way for mass manufacturing at low cost using solution processing techniques.
Mechanical control of a reconfigurable intelligent surface
A mechanical RIS has been developed with high reconfiguration degree of freedom, low power consumption, and real-time dynamic control capabilities. It uses a robust control method to determine the rotation angle of each meta-atom and offers a new energy-saving and environmentally friendly alternative for wireless communications systems.
Why the world needs a better LED light bulb
Researchers have developed a new light-emitting material that doubles the intensity of existing LEDs while also being more energy-efficient. The material, cerium-doped zinc oxide, has the potential to be used in commercial LED lighting applications and could make lighting more affordable for households and businesses worldwide.
New synthesis process paves way for more efficient lasers, LEDs
Researchers at North Carolina State University have developed a new synthesis process that increases the number of holes in p-type III-nitride semiconductor materials, leading to more efficient LEDs and lasers. This breakthrough could also help address the long-lasting problem called the 'green gap' in LED technology.
Beyond 5G: Wireless communications may get a boost from ultra-short collimating metalens
Researchers at Tokyo University of Agriculture and Technology developed ultra-short collimating metalens that can manipulate terahertz waves, enhancing directivity by three times. The technology has promising applications for short-range data exchanges and may support emerging 6G wireless communications.
Terahertz accelerates beyond 5G towards 6G
Researchers successfully transmit uncompressed 8K video wirelessly using terahertz waves, enabling low latency and low power consumption. The technology is expected to accelerate research and development for the realization of 6G mobile communication standard.
A 2D perspective: stacking materials to realize a low power consuming future
Researchers at DGIST have devised a 2D-material-based stacked structure that reduces computing power consumption. The study measured the energy of excitons and trions in multistacked hBN/WS2 coupled quantum wells, revealing a gradual decrease in energy with an increase in stakes.
Record high values of peak power with picosecond generators
Scientists developed compact solid-state pulse generators that can produce electrical pulses of less than one billionth of a second in duration and up to 50 billion watts in power. This breakthrough sets the groundwork for new applications in fields such as high-power microwave electronics and X-ray imaging devices.
Physicists build circuit that generates clean, limitless power from graphene
Physicists at the University of Arkansas have successfully developed a graphene-based circuit capable of capturing thermal motion and converting it into electrical current. The discovery proves a long-held theory that graphene can harness energy from its atomic motion.
Novel method of heat conduction could be a game changer for server farms and aircraft
Researchers have developed a novel approach to thermal management using bridging-droplet diodes, which can efficiently conduct heat in one direction. The device uses a wick structure to absorb heat and produces steam that condenses on the opposite side, allowing for improved heat conduction and reduced thermal resistance.
Molecular circuitry: International team breaks one-diode-one resistor electronics
An international team of researchers has developed a new type of molecular circuit switch that can operate as both a diode and a memory element. The breakthrough device is just 2 nanometers thick and requires low drive voltage, opening up the possibility for ultra-high-density computing within our lifetime.
NRL researchers create electronic diodes beyond 5G performance
Researchers at the Naval Research Laboratory created a new type of electronic component that surpasses the speed of 5G networks. The gallium nitride-based resonant tunneling diode displays record current outputs and switching speeds, enabling applications in millimeter-wave region and terahertz frequencies.
Researchers develop one-way street for electrons
Researchers at UNC Chapel Hill developed a one-way street for electrons by shaping silicon into a funnel, allowing for faster data processing and energy harvesting. This technology may enable devices to wirelessly charge themselves from the data they receive without needing to leave a person's wrist.
A trick for taming terahertz transmissions
Researchers at Osaka University developed a novel receiver that overcomes obstacles in terahertz radiation, enabling record-breaking transmission speeds of 30 gigabits per second. The new technology has the potential to revolutionize next-generation 6G cellular network technology and various other applications.
Development of highly sensitive diode, converts microwaves to electricity
Researchers developed a highly sensitive nanowire backward diode that can convert low-power microwaves into electricity, exceeding conventional Schottky barrier diodes by over 10 times. This technology has the potential to power sensors in areas where traditional batteries are impractical.
Computer scientists create programmable self-assembling DNA
Researchers at University of California, Davis and Maynooth University created programmable DNA molecules that can self-assemble into patterns by running their own program. They designed and ran 21 algorithms, demonstrating the potential of the system for sophisticated molecular engineering.
New 3D nanoprinting strategy opens door to revolution in medicine, robotics
Researchers at UMD create the smallest-known 3D microfluidic circuit element, overcoming cost and complexity barriers in personalized medicine and drug delivery. The new strategy allows for faster, cheaper, and more efficient 3D printing of complex fluidic systems.
Laser diode combats counterfeit oil
Researchers at UCM have designed a laser sensor that can detect counterfeit olive oil labelled as extra virgin or protected designation of origin. The tool uses laser diodes to distinguish between adulterated and pure oils due to differences in fluorescence.
New model for assessing the effect of ionizing radiation on microelectronic devices
Researchers from Lobachevsky University developed a new diffusion-drift model to analyze the effect of ionizing radiation on submicron semiconductor devices. The locally non-equilibrium approximation accurately describes fast relaxation processes and calculates the probability of device failure.
SUTD researchers resolve a major mystery in 2D material electronics
Researchers from Singapore University of Technology and Design have resolved a major mystery in 2D material Schottky diodes by employing a rigorous theoretical analysis. A new theory describes different variants under a unifying framework, laying down a foundation to unite prior contrasting models.