Light Emitting Diodes
Articles tagged with Light Emitting Diodes
Brighter, more stable red LEDs for next-generation micro-LED displays
The study demonstrates a significant improvement in red light emission from Eu-doped gallium nitride grown on a semipolar crystal plane. The approach selectively promotes the formation of highly efficient luminescent centers, resulting in brighter and more stable red LEDs for next-generation micro-LED displays.
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.
Tiny LED design could power next-generation technology
Researchers from The University of Osaka propose a compact LED design that directly emits circularly polarized light, potentially simplifying optical devices. The new design uses robust inorganic materials and achieves high levels of both efficiency and polarization degree.
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.
Professor Tae-Woo Lee's research team develops mass production technology for ultra-high color purity perovskite emitters
Professor Tae-Woo Lee's research team has developed a 'Cold-injection' method to synthesize high-quality perovskite nanocrystals at room temperature, overcoming safety risks and production costs. The technology achieved near-unity photoluminescence quantum yield in a large-scale synthesis of 20 liters.
Physicists employ AI labmates to supercharge LED light control
Researchers at Sandia National Laboratories have successfully employed artificial intelligence labmates to improve the control of LED lights, leading to a fourfold increase in steering efficiency. The AI platform uses a combination of machine learning and equation-learning techniques to optimize experiments and achieve new insights int...
A nanomaterial flex — MXene electrodes help OLED display technology shine, while bending and stretching
Researchers developed a flexible OLED display that can be stretched to 1.6 times its original size while maintaining most of its luminescence. The technology uses MXene nanomaterial and an exciplex-assisted phosphorescent layer, improving the OLEDs' ability to efficiently produce light under strain.
The world’s first room temperature continuous-wave UV-B laser diode on a sapphire substrate
Researchers at Meijo University have developed the world's first continuous-wave UV-B semiconductor laser diode operating at room temperature on a low-cost sapphire substrate. The achievement advances compact, energy-efficient UV light sources for various applications.
Optics research uses dim light to produce bright LEDs
Researchers at Princeton University have developed a new technique to convert low-energy light into high-energy LEDs, improving the ability to upconvert green light to blue or ultraviolet light. The method uses plasmonics to boost upconversion on a thin metal film, reducing the power needed by 19 times compared to previous setups.
Light-speed learning: A brain-inspired chip that thinks with light
Researchers developed a bio-inspired neuron platform that processes and learns information using light and electronics integrated on a single platform. The chip achieves 92% image recognition accuracy and demonstrates key synaptic behaviors found in biological learning.
Spin textures and multi-periodic spin tunnel junction enable record polarization in semiconductor light emitting
Researchers develop record-high circular polarization of 25.3% in GaN-based spin-LEDs using multi-periodic spin tunnel junction, enabling zero-field spin-LED performance. The design harnesses topological spin textures for controlling electrons and filtering, achieving a breakthrough in device operation.
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.
Stable and versatile optical wireless power transmission for sustainable IoT
Scientists at Institute of Science Tokyo developed an automatic and adaptive LED-based optical wireless power transmission system that can efficiently power multiple devices without interruption. The system overcomes limitations of traditional OWPT systems by adapting to varying lighting conditions and ensuring stable power delivery.
Year-round edamame: hydroponic LED plant factories redefine sustainable cultivation
Researchers at Hosei University developed a hydroponic cultivation system using LED lighting to produce high-quality edamame consistently throughout the year. The nutrient film technique (NFT) method resulted in higher yields, better nutritional value, and increased productivity compared to traditional open-field cultivation.
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.
Deep blue organic light-emitting diode breakthrough operates at just 1.5 V
Researchers developed a deep blue organic light-emitting diode (OLED) capable of producing sharp blue emission meeting BT.2020 standards with just a single 1.5 V battery. The device operates by introducing a new molecular dopant that prevents charge trapping, a problem that previously hampered the performance of low-voltage OLEDs.
The UJI contributes to increasing the performance of a new generation of LEDs
Researchers at Universitat Jaume I develop cost-effective, high-performance chiral LEDs with enhanced optical properties. The RADIANT project aims to simplify display architectures and save energy consumption by leveraging scalable chiral metasurfaces.
Spinel-type sulfide semiconductors to operate the next-generation LEDs and solar cells For solar-cell absorbers and green-LED sources
A new spinel-type sulfide semiconductor, (Zn,Mg)Sc2S4, has been developed by researchers at Science Tokyo. The material can be chemically tuned to switch between n-type and p-type conduction, making it suitable for pn homojunction devices in next-generation LEDs and solar cells.
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.
In-situ molecular passivation enables pure-blue perovskite LEDs via vacuum thermal evaporation
Researchers develop an in-situ passivation strategy to overcome efficiency bottlenecks in thermally evaporated pure blue perovskite LEDs. The approach coordinates Pb(II) and suppresses halide-vacancy defects, achieving color-stable pure-blue emission with high luminance.
Ultranarrowband deep-blue MR-TADF in a BN-embedded cyclophane for efficient OLEDs
Researchers have developed a new macrocyclic [1,4]azaborine system that emits narrowband deep-blue light with a full width at half maximum of just 24 nm. The material achieves a peak external quantum efficiency of 23.3% in OLED devices.
Achieving the lowest operating voltage yet for white organic LEDs
Researchers developed a white organic light-emitting diode that operates at an unprecedentedly low voltage of less than 1.5 volts. This breakthrough could contribute to reducing energy consumption in state-of-the-art displays, including television backlights and lighting devices.
New Science Bulletin review: Beijing Jiaotong University and Sichuan University explore AI-powered OLED material design
The review proposes a systematic AI-driven framework for OLED material design, offering theoretical guidance and practical pathways for intelligent materials development. Machine learning models are used to predict core optoelectronic properties, enabling rapid and accurate property prediction while providing structural insights that g...
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.
New LED-based imaging system could transform cancer detection in endoscopy
A new prototype imaging system combines light-emitting diodes (LEDs) with hyperspectral imaging technology to create detailed maps of tissue properties invisible to conventional cameras. The system shows promise for cancer detection during endoscopy, achieving real-time speeds and high-quality data comparable to reference systems.
World’s first: Lithuanian scientists’ discovery may transform OLED technology and explosives detection
Researchers have observed the luminescence of an excited complex formed by two donor molecules, opening possibilities for developing simpler, more efficient OLED devices. The discovery also enables the creation of sensitive sensors capable of detecting low concentrations of explosive substances.
Spin-configuration of emission states in zero-dimensional metal halides
Researchers discovered the spin configuration of excited states in a typical zero-dimensional metal halide material, challenging traditional views on dual-peak emission. The study reveals that the low-energy peak includes both bright and dark states, while the high-energy peak is from a pure bright state.
Pulsed operation of perovskite LEDs: a study on the role of mobile ions
Researchers investigated pulsed operation of perovskite LEDs to understand the role of mobile ions in maintaining stable light emission. They found a constant transient electroluminescence signal with higher intensity at higher duty cycles, which decreased with increasing duty cycle.
Shape memory polymer dry adhesive technology paves the way for micro-LED innovation
Researchers at Pohang University of Science and Technology developed a novel dry adhesive technology using shape memory polymers, allowing for precise micro-LED chip transfer with minimal residue. The technology offers significant advantages over conventional methods, including high adhesion strength and easy release.
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.
One needle, infinite paths: Reinventing 3D printing for flexible circuits
The team developed a tension-driven fluid drawing technique that enables the creation of freestanding, conductive architectures with miniaturization and mechanical resilience. The method achieved sub-10 μm resolution and demonstrated promising results in LED arrays, thermal sensors, and oscillating circuits.
USTC develops weakly space-confined all-inorganic perovskite light-emitting diodes
Researchers at USTC have developed weakly space-confined all-inorganic perovskite light-emitting diodes (PeLEDs) with a luminous efficiency exceeding 22%. The new PeLEDs achieve a maximum brightness of over 1.16 million nits and can operate for more than 180,000 hours.
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.
USTC makes perovskite LED breakthrough with novel crystal engineering
The USTC team identified a novel material design that enables record-breaking device performance in pure-red PeLEDs. They introduced a 3D intragrain heterostructure to enhance carrier confinement capacity, suppressing hole leakage and achieving unprecedented efficiency and brightness.
Ultrathin interlayer empowers green ZnSeTe QD-LEDs: brighter, more efficient, driving eco-friendly displays forward
Researchers developed bright and efficient green-emitting ZnSeTe-based QD-LEDs by introducing an ultrathin ZnSeS alloy interlayer, enhancing radiative recombination efficiency and optical stability. The devices showed a peak external quantum efficiency of 20.6% and luminance exceeding 100,000 cd m−2.
POSTECH unveils world’s first dynamic shape-morphing OLED panel with built-in speaker — all while maintaining ultra-thin flexibility
The POSTECH research team developed a smartphone-type OLED panel that can transform its shape while functioning as a speaker, maintaining ultra-thin flexibility. The panel uses electrically driven piezoelectric polymer actuators to achieve complex forms without mechanical hinges or motors.
Low-threshold anisotropic polychromatic emission from monodisperse quantum-dots
Researchers have successfully achieved low-threshold anisotropic polychromatic emission from monodisperse quantum dots by coupling them with microcavities, overcame technical bottlenecks for practical applications. This enables broadband gain, amplification, and even lasing, as well as full-color display and patterning.
Researchers develop new nanoplastic for sustainable street lighting
A new study introduces nanoPE, a nanomaterial that enhances thermal radiation emission from LEDs, reducing temperature and energy loss. This technology can significantly reduce carbon dioxide emissions in the US by over one million metric tons.
Spinning, twisted light could power next-generation electronics
Researchers have developed a chiral semiconductor that emits circularly polarised light, potentially improving OLED display efficiency and enabling quantum computing. The innovation uses molecular design tricks inspired by nature to create ordered spiral columns of semiconducting molecules.
Cheap and environmentally friendly – the next generation LEDs may soon be here
Perovskite LEDs have shown great potential for commercialization due to their lower costs and environmental impact. However, longevity remains a significant issue that needs to reach around 10,000 hours for a positive environmental impact.
Quantum dot discovery for LEDs brings brighter, more eco-friendly displays
Researchers at Curtin University have developed a new type of quantum dot that matches or outperforms traditional cadmium-based QLEDs in terms of efficiency and color accuracy. The breakthrough technology emits pure and vibrant blue light with an impressive 24.7% efficiency, lasting nearly 30,000 hours.
Quantum dot technology breakthrough! The display is more realistic in color and lasts longer
Researchers have developed a high-temperature successive ion layer adsorption and reaction (HT-SILAR) strategy for producing high-quality, large-particle alloyed red quantum dots. This enables the creation of highly efficient QLEDs with exceptional color purity and stability.
Hybrid states of light and matter may significantly enhance OLED brightness
Researchers developed a theoretical model predicting substantial increase in OLED brightness by leveraging polaritons, promising improved efficiency and brightness. The study proposes new materials discovery and architecture development to achieve single-molecule strong coupling or tailored molecules for polariton OLEDs.
How does light affect citrus fruit coloration and the timing of peel and flesh ripening?
Researchers discovered how red and blue LED light promotes chlorophyll degradation and carotenoid synthesis in mandarin fruit. The study found that the protein CcUNE10 plays a key role in this process, enhancing research on the bHLH transcription factor family's function.
Mizzou scientists harness the power of ‘layered’ crystals for energy innovation
Researchers are exploring halide perovskites, a material that converts sunlight into energy efficiently. The team created distinct properties using ultra-cool methods, enabling mass production of solar cells.
Faster organic phosphorescence for better display tech
Researchers develop new organic LED material that maintains sharp color and contrast while replacing heavy metals with a hybrid material. The material achieves stable, fast phosphorescent light emission, necessary for modern displays operating at 120 frames per second.
USTC proposes a new strategy for designing pure-red OLED materials
Researchers have designed a new strategy for creating pure-red organic light emitting diodes (OLEDs) with improved efficiency and color purity. The molecule BNTPA achieves record-breaking external quantum efficiency, making it suitable for next-generation high-definition displays and energy-efficient lighting systems.
Photodynamic therapy with annatto colorant found to be effective against bad breath
A study published in PLOS ONE found that antimicrobial photodynamic therapy using annatto colorant was effective in treating halitosis in mouth-breathing children. The researchers used a LED light source to target the annatto, which generated reactive oxygen species that killed bacteria on the tongue, leading to improved oral health.
Brighter and more efficient LEDs that don’t droop
A team of researchers at Nagoya University has developed a way to make LEDs brighter while maintaining their efficiency. By tilting the InGaN layers and cutting the wafer into different orientations, they have found that LEDs with lower polarization but in the same direction as standard LEDs show greater efficiency at higher power.
Chemistry paper discusses new approach to breakdown PFAS, forever chemicals
Researchers at Colorado State University have developed a new method to break down PFAS, a group of human-made 'forever' chemicals. The system uses an LED light-based photocatalytic approach that can be used at room temperature, offering a more sustainable and efficient solution than traditional chemical manufacturing processes.
‘Cool’ white car headlights more likely to dazzle moths
New research reveals that 'cool' white lights used in modern car headlights cause moths to fly erratically and be more likely to collide with cars. By switching to warmer-coloured LEDs or different LED technology, the impact on moths can be dramatically reduced.
Could lights stop shark attacks
Researchers develop counterillumination technology to trick great white sharks' visual systems, making them less likely to attack humans. By using LED lights in specific patterns and brightness, the device disrupts the shark's silhouette, reducing the risk of bites.
A KAIST team develops face-conforming LED mask showing 340% improved efficacy in deep skin elasticity
A KAIST team created a face-conforming LED mask with improved efficacy in skin rejuvenation. The FSLED mask demonstrated a 340% improvement in deep skin elasticity compared to conventional masks, showing significant benefits for anti-aging treatment.
New DUV micro-LED array advances maskless photolithography
Researchers developed a vertically integrated micro-scale light-emitting diode (micro-LED) array that can be used in deep ultraviolet (DUV) maskless photolithography. The system demonstrated high pixel density and successfully displayed patterns on silicon wafers, paving the way for future advancements in semiconductor manufacturing.
SNU-Samsung Electronics SAIT jointly discovers mechanism of performance degradation in OLEDs
The research team identified a critical mechanism behind OLED performance degradation: interfacial exciton-polaron quenching. By controlling this phenomenon, they achieved an increase in efficiency of over 50% for red, green, and blue phosphorescent OLEDs and extended the lifespan of blue OLEDs by more than 70%.
Engineering perovskite materials at the atomic level paves way for new lasers, LEDs
Scientists developed a technique to engineer LHPs with controlled size distribution of quantum wells, improving efficiency and stability in LEDs and lasers. By controlling nanoplatelets' growth, they achieved excellent energy cascades, enhancing photovoltaic performance and stability.
SNU researchers develop ultra-high efficiency next-generation perovskite light-emitting diodes by strengthening perovskite lattice
Researchers at Seoul National University developed ultra-high efficiency perovskite nanocrystal LEDs by incorporating conjugated molecular multipods to strengthen the lattice and reduce dynamic disorder, leading to improved luminescence efficiency. This achievement is expected to significantly accelerate the commercialization of next-g...
High-performance organic polariton light-emitting diodes for laser displays
Researchers developed organic polariton light-emitting diodes (OPLEDs) to overcome OLED limitations, achieving high-brightness, narrowband, and high-color purity emission. OPLEDs showcase exceptional performance in next-generation laser displays with over 780,000 cd/m² brightness.