Optical wireless may be the answer to dropped calls, and more
Anyone who has tried to make a cell phone call from a crowded football stadium has had a taste of what engineers call spectrum crunch.
New kind of ultraviolet LED could lead to portable, low-cost devices
Commercial uses for ultraviolet (UV) light are growing, and now a new kind of LED under development at The Ohio State University could lead to more portable and low-cost uses of the technology.
Researchers identify cause of LED 'efficiency droop'
(Phys.org) —Rensselaer Polytechnic Institute researchers have identified the mechanism behind a plague of LED light bulbs: a flaw called "efficiency droop" that causes LEDs to lose up to 20 percent of their ...
Two in one solution for low cost polymer LEDs and solar cells
UNIST researchers report considerable improvement in device performance of polymer-based optoelectronic devices. Published in Nature Photonics today, the new plasmonic material, can be applied to both polymer light-emitting diodes ...
Student's flashlight works by body heat, not batteries
Silicon-based nanoparticles could make LEDs cheaper, greener to produce
(Phys.org) —Light-emitting diodes, or LEDs, are the most efficient and environmentally friendly light bulbs on the market. But they come at a higher up-front price than other bulbs, especially the ones ...
New family of tiny crystals glow bright in LED lights
(Phys.org) —Minuscule crystals that glow different colors may be the missing ingredient for white LED lighting that illuminates homes and offices as effectively as natural sunlight.
New LED streetlight design curbs light pollution
Streetlights illuminate the night, shining upon roadways and sidewalks across the world, but these ubiquitous elements of the urban environment are notoriously inefficient and major contributors to light ...
New research findings open door to zinc-oxide-based UV lasers, LED devices
(Phys.org) —Researchers from North Carolina State University have solved a long-standing materials science problem, making it possible to create new semiconductor devices using zinc oxide (ZnO) – including efficient ultraviolet ...
Review: 'Smart' LED bulbs controlled by iPhones
LED bulbs seem to be the future of home lighting: They save electricity, they're durable and they don't contain mercury like compact fluorescents. But having them produce white light like any old light bulb ...
Kickstarter project team claims its LED bulb world's most efficient
New material for warm-white LEDs invented
Light emitting diodes, more commonly called LEDs, are known for their energy efficiency and durability, but the bluish, cold light of current white LEDs has precluded their widespread use for indoor lighting.