Articles tagged with Phosphors
Researchers crack the 'color shift puzzle' by revealing local electron-phonon coupling as the key to temperature-dependent luminescence changes in phosphors. This discovery offers a predictive framework for designing thermally stable phosphors with tailored emission properties.
Researchers at The University of Osaka have created an eco-friendly organic liquid that phosphoresces at room temperature, overcoming issues with molecular aggregation and stability. This discovery offers potential applications in electronic displays, particularly for wearable devices.
Researchers have introduced a game-changing technique called Up-Conversion Charging (UCC) that slashes writing times for single data to just 0.01 seconds, paving the way for high-density storage. UCC uses nonlinear excitation with visible light to guide electrons up an energy ladder, sharpening precision and refining patterns.
A breakthrough near-infrared photobiomodulation technique has shown potential in suppressing neuroinflammation and promoting microglia cell proliferation. The study's findings suggest that LEDs with broadband NIR emission could offer a cost-effective, side-effect-free treatment option for millions suffering from neurodegenerative disea...
Scientists have discovered a new path to overcome the significant challenge of creating efficient green LEDs. By utilizing cubic III-nitride materials with an innovative aspect ratio phase trapping technique, researchers have successfully synthesized a green-emitting layer achieving up to 32% internal quantum efficiency.
Researchers developed a new garnet material with enhanced quantum efficiency and thermal stability, using chemical unit cosubstitution. The material shows promising applications in bio-tissue imaging, night-vision, and information encryption.
Scientists at Yokohama National University created ceramic eutectic composites through CVD, demonstrating the generation of spatially ordered patterns. The process allows for doped luminescent centers, enabling environmental-resistant LED lighting and high-resolution X-ray imaging.
Researchers at Tokyo Institute of Technology have successfully synthesized high-quality Cs3Cu2I5 thin films using a novel solid-state synthesis method. The team discovered that depositing CuI and CsI layers in specific ratios results in distinct local structures containing point defects, leading to highly efficient emissions.
A research team at UNIST has developed a perovskite-silicon tandem solar cell with a special textured anti-reflective coating, increasing its power conversion efficiency to 23.50%. The device maintains its initial efficiency for 120 hours, outperforming existing devices which drop to 50% after 20 hours.
Research reveals organic aggregates can emit polychromic and white light with high efficiency, opening up new avenues for OLEDs and encryption. However, more work is needed to fully understand the underlying mechanisms and improve performance.
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 Toyohashi University of Technology synthesized new Mn4+-activated red phosphors with high photoluminescence intensity, revealing the relationship between crystal structure and sintering temperature. The findings have important implications for the development of high-color-rendering-index materials for LED applications.
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 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.
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.
The study analyzed the changes in crystal structure of a red phosphor material due to heat treatment and addition of P2O5 and Eu2O3, revealing its relationship with photoluminescence intensity. The researchers discovered an incommensurate (IC) phase with a complex modulation structure that decreases photoluminescence intensity.
Chemists at the University of Innsbruck have created a novel red phosphor called SALON, which emits light in the visible red range and reduces energy loss. This breakthrough could lead to more efficient white LEDs with improved color quality.
A Kanazawa University-led team has created a method to extract rare earth elements from spent phosphors in fluorescent lamps using chelator chemistry and mechano-chemical energy. The process results in recoveries of 53% to 84% of the metals, offering a sustainable solution for technology
Researchers developed a machine learning algorithm to predict properties of compounds for efficient phosphors in LEDs. The algorithm reduced the search time from weeks to just 30 seconds, identifying sodium-barium-borate as a promising material with 95% efficiency and outstanding thermal stability.
A team of engineers at UC San Diego used data mining and computational tools to discover a new phosphor material that is inexpensive, easy to make, and produces high-quality white LEDs. The new material, dubbed SLAO, has better color quality than many commercial LEDs and can be manufactured using industrial methods.
Researchers have created stable silver clusters within zeolite frameworks, maintaining their unique optical properties. This breakthrough has great potential for the development of more efficient and affordable fluorescent and LED lighting.
Scientists at Queen Mary University of London developed a new lighting material using silver, which can emit light with high efficiency and is cheap to produce.
By rapidly changing the environment around phosphor emitters, researchers have developed a method to modulate their emission at high speeds, overcoming the limitation of slow optical lifetimes. This breakthrough could enable the use of phosphors in new applications, such as optical communications networks on computer chips.
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%.
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.
Researchers at LMU Munich have developed a novel red phosphor material that significantly enhances the performance of white-emitting LEDs. The new material generates 14% more light than conventional white-light LEDs while maintaining an excellent color rendering index.
Scientists have developed a solid-state vacuum ultraviolet lamp that emits high-energy UV light at the shortest wavelengths ever recorded. This breakthrough promises smaller, safer, and longer-lasting lamps for sterilizing medical devices and cleaning semiconductor substrates.
Researchers at UC Santa Barbara's SSLEC discovered simple guidelines to optimize phosphors in white LED lighting, yielding brighter and more efficient lights. The breakthrough paves the way for high-efficiency solid-state lighting with potential to replace lower-efficiency incandescent and fluorescent bulbs.
Researchers at University of California, Santa Barbara, have devised a new method for creating high-power white light using a laser diode in combination with inorganic phosphors. The resulting lighting options are high in efficiency and have been shown to achieve a luminous flux comparable to current high-brightness white LEDs.
The EU-funded 'LUMINET' project aims to develop novel luminescent materials that minimize the use of rare earths. Researchers are exploring new methods to produce phosphors without these precious commodities.
The University of Georgia scientists have fabricated the world's first LED that emits a warm white light using a single phosphor with a single emitting center. The new material achieves a warm color temperature while maintaining accurate color rendition, ideal for indoor lighting.
Researchers at the University of Michigan have developed a new class of material that shines with phosphorescence in jewel tones. The discovery could lead to cheaper and more efficient display screens, as well as improved organic light-emitting diodes.
Researchers have developed a rapid and non-disruptive decontamination system that can kill anthrax spores in two to three hours without lingering effects. The system uses X-rays and ultraviolet-C light simultaneously to attack and destroy the bacteria, making it an improvement over existing methods.
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.
Sandia scientists have improved portable computer display screens using phosphor luminescence, which can reduce power consumption and improve performance. The new technology can operate at low voltage and is expected to outperform liquid crystal displays in various applications.