KIT Demonstrates Light from Silicon Nanocrystal LEDs
ilicon nanocrystals have a size of a few nanometers and possess a high luminous potential. Scientists of KIT and the University of Toronto/Canada have now succeeded in manufacturing silicon-based light-emitting diodes (SiLEDs). They are free of heavy metals and can emit light in various colors. The team of chemists, materials researchers, nanoscientists, and opto-electronic experts presents its development in the “Nano Letters” journal.
Read more »
Bluglass Produced p-GaN Films that Meet Industry Benchmark for the First Time
Australian clean technology innovator, BluGlass Limited (ASX: BLG) announced today that it has succeeded in producing p-type gallium nitride (GaN) films with industry equivalent electrical properties using its breakthrough low temperature Remote Plasma Chemical Vapour Deposition (RPCVD) technology when grown on top of MOCVD GaN templates.
Read more »
Organic Electronics - How To Make Contact Between Carbon Compounds and Metals
Organic electronics has already hit the market in smartphone displays and holds great promise for future applications like flexible electroluminescent foils (a potential replacement for conventional light bulbs) or solar cells that convert sunlight to electricity. A reoccurring problem in this technology is to establish good electrical contact between the active organic layer and metal electrodes. Organic molecules are frequently used also for this purpose. Until now, however, it was practically impossible to accurately predict which molecules performed well on the job. They basically had to be identified by trial-and-error. Now, an international team of scientists around Dr. Georg Heimel and Prof. Norbert Koch from the HZB and the Humboldt University Berlin has unraveled the mystery of what these molecules have in common. Their discovery enables more focused improvements to contact layers between metal electrodes and active materials in organic electronic devices.
Read more »
Cree Sets New R&D Performance Record with 276 Lumen-Per-Watt Power LED
Cree, Inc. delivers another industry first with a barrier-breaking 276 lumen-per-watt white R&D power LED. This significant milestone exceeds Cree’s previous R&D industry record of 254 lumens per watt and demonstrates Cree’s continued commitment to innovate and accelerate the adoption of LED lighting. Read more »
New Atomic Layer Deposition Process for Nitride LED Reflector Structures
Although some groups have developed DBRs for increasing output power of LEDs before, this approach is claimed as the first proposal and demonstration of DBRs grown using ALD rather than electron-beam (EB) evaporation. The advantages of ALD over EB evaporation include better thickness uniformity over large-diameter substrates and thickness control at the atomic level.
Read more »
Public Funded OLED Project So-Light Successfully Concluded
Eleven leading German OLED companies and research institutions announced the successful completion of the OLED (Organic Light Emitting Diode) related project; So-Light. This € 14.7 m project was supported by the German Ministry of Education and Research (BMBF) over a three and a half year period and addressed the complete value chain, from primary OLED materials through to OLED-lighting applications. Several of the promising innovations created within the project will now be brought to market by the participants of the So-Light project.
Read more »
Tamura and Koha Demonstrate White LED Using Gallium Oxide at Lighting Japan 2013
Tamura Corp and Koha Co Ltd developed a white LED using gallium oxide (β-type Ga2O3) and exhibited it at Lighting Japan 2013, a trade show of lighting devices, which took place from Jan 16 to 18, 2013, in Tokyo.
Read more »
New Options for Transparent Contact Electrodes
Found in flat screens, solar modules, or in new organic light-emitting diode (LED) displays, transparent electrodes have become ubiquitous. Typically, they consist of metal oxides like In2O3, SnO2, ZnO and TiO2 .
Read more »
University Claims Development of Revolutionary New Zirconium-Doped Hafnium Oxide based Low-Cost LED
Professor Yue Kuo of the Artie McFerrin Department of Chemical Engineering at Texas A&M University has fabricated a new type of LED, capable of producing a wide spectrum light while operating for long periods of time at atmospheric conditions. This device is based on a new concept of light emission from an ultra-thin amorphous dielectric layer.
Read more »
Scientists Mimic Fireflies to Make Brighter LEDs
The nighttime twinkling of fireflies has inspired scientists to modify a light-emitting diode (LED) so it is more than one and a half times as efficient as the original. Researchers from Belgium, France, and Canada studied the internal structure of firefly lanterns, the organs on the bioluminescent insects’ abdomens that flash to attract mates. The scientists identified an unexpected pattern of jagged scales that enhanced the lanterns’ glow, and applied that knowledge to LED design to create an LED overlayer that mimicked the natural structure. The overlayer, which increased LED light extraction by up to 55 percent, could be easily tailored to existing diode designs to help humans light up the night while using less energy. The work is published in a pair of papers today in the Optical Society’s (OSA) open-access journal Optics Express.
Read more »
Copper, Gold and Tin for Efficient LED Chips
With gold, copper or tin and special galvanizing processes, scientists are improving the function of semi-conductors and making the manufacture of microelectronic systems a child‘s play. Especially the LED industry could profit from this.
Read more »
BluGlass Demonstrates Low Temperature Grown n-GaN Films that Meet Industry Benchmarks
Australian clean technology innovator, BluGlass Limited announced today that it is now producing n-type gallium nitride (GaN) films with demonstrated industry equivalent performance properties using its breakthrough low temperature Remote Plasma Chemical Vapour Deposition (RPCVD) technology when grown on top of MOCVD GaN templates. Read more »
Development of Gallium Nitride Wafers Nearly Doubling Green LED Luminous Efficiency
The GaN wafers developed by NGK feature low defect density across the entire 2-inch diameter of the wafer surface and have a colorless transparency. NGK achieved this through proprietary improvements to liquid phase epitaxial technology for single crystal growth.
Read more »
Key Milestone Reached in OLED Development: cynora Presents New Flexible Prototype
cynora today unveiled a new flexible OLED prototype, demonstrating yet again the huge potential of OLED technology. One key aspect that sets organic light-emitting diodes (OLEDs) apart from conventional LEDs, is that they are two-dimensional light sources. Additionally, they are extremely thin. This property makes them ideally suited for lighting systems and flat screen displays. So far, however, OLEDs have only been used in rigid form in these application areas.
Read more »
NTNU Researchers Commercialize Semiconductors Grown on Graphene
NTNU researchers have patented and are commercializing GaAs nanowires grown on graphene, a hybrid material with competitive properties. Semiconductors grown on graphene are expected to become the basis for new types of device systems, and could fundamentally change the semiconductor industry. The technology underpinning their approach has recently been described in a publication in the American research journal Nano Letters.
Read more »
