Technology | Dec 18, 2006

UC Santa Barbara Researchers Set New Records in Energy Efficient Light Emitting Diodes

Santa Barbara, California USA-- Researchers at UC Santa Barbaras Solid State Lighting & Display Center and the Japan Science & Technology Agencys Exploratory Research for Advanced Technology program (JST ERATO) have set new records for nonpolar and semipolar light emitting diode (LED) efficiency. Read more »

Technology | Dec 12, 2006

Team awarded for better bulb discovery

A team of scientists at Vanderbilt University have been given an award from Popular Mechanics magazine for a discovery that could someday replace the common light bulb, the researchers say. Read more »

Technology | Nov 29, 2006

MIT chemist studies how electrons behave

In a device such as an optical display, positive (purple) and negative (gold) charges are attracted strongly to one another and become trapped (first picture). Because of the unusual rules of quantum physics, the trapped charges can emit light (second picture) if they are spinning in opposite directions. Van Voorhis is creating simulations to show how to selectively create trapped charges in organic light-emitting diode displays to improve efficiency. Image courtesy / Troy Van Voorhis New spin on electrons could improve lights, other devices. Troy Van Voorhis likes to watch how things work. This natural curiosity led to his current research on the behavior of electrons and how they function in various molecular systems, including artificial photosynthesis. Read more »

Technology | Nov 16, 2006

QD Vision improves quantum-dot LED performance

WATERTOWN, Mass., QD Vision, Inc., announced it has achieved significant improvements in efficiency of its red quantum-dot light-emitting devices (QD-LEDs). The trend of improvements in brightness, color, resolution and other metrics continue to advance QD- LEDs toward best-in-class performance levels among display technologies. Read more »

Technology | Nov 16, 2006

Shimei Semiconductor grows blue LED on silicon wafer

shimei-gif "Shimei Semiconductor Co. has developed a blue LED grown on a silicon wafer that it plans to make available by next April. Read more »

Technology | Oct 27, 2006

Organic semiconductors make cheap, flexible photovoltaics and LEDs

Schematic of a junction between two organic semiconductors, an anthracene derivative containing free positive ions and a ruthenium, complex containing negative ions. When the two are joined, ions diffuse across. Imagine T-shirts that light up, or a beach umbrella that collects solar energy to run a portable TV. How about really cheap solar collectors for the roof? All this and more could come from cutting-edge research at Cornell that demonstrates a new type of organic semiconductor device which shows electroluminescence and acts as a photovoltaic cell. Read more »

Technology | Sep 26, 2006

QD Vision chief technologist Seth Coe-Sullivan named top innovator by Tech Review Magazine: MIT journal honors 35 top scientific and technology innovators under the age of 35

WATERTOWN, MA, SQD Vision, Inc. announced that Cofounder and Chief Technologist Seth Coe-Sullivan has been recognized by Technology Review as one of the world’s Top Science and Technology Innovators under the age of 35 for his breakthrough work in quantum dot LED performance and manufacturing process technology. Read more »

Technology | Sep 06, 2006

Japanese scientists have proposed a solution to the puzzle of why blue light-emitting diodes are so bright

bright-20blue-20led-gif Despite huge commercial success, until now the reason for the unusual brightness has not been known. The material they are made from - indium gallium nitride - can only be fabricated to such a poor quality that it would not be expected to emit much light. Read more »

Technology | Aug 25, 2006

Rensselaer researchers aim to close 'green gap' in LED technology

greenled_b-jpg Troy, N.Y. - A team of researchers from Rensselaer Polytechnic Institute has received $1.8 million in federal funding to improve the energy efficiency of green light-emitting diodes (LEDs). Read more »

Technology | Jul 27, 2006

Novel Nano-Etched Cavity Makes LEDs 7 Times Brighter

Etched nanostructured rings around an LED can make it more than seven times brighter. The novel technique developed at NIST may have applications in areas such as in biomedical imaging where LED brightness is crucial. Researchers at the National Institute of Standards and Technology (NIST) have made semiconductor light-emitting diodes (LEDs) more than seven times brighter by etching nanoscale grooves in a surrounding cavity to guide scattered light in one direction. Read more »

Technology | Jul 18, 2006

Paint-on semiconductor outperforms chips

Paint-on semiconductor ( Image from Ted Sargent) Researchers at the University of Toronto have created a semiconductor device that outperforms today's conventional chips -- and they made it simply by painting a liquid onto a piece of glass. Read more »

Technology | Jun 01, 2006

Photonics crystals improve LED efficiency

Figure 1 A 50% increase in efficiency is a significant stride toward being viable sources for solid-state lighting. Read more »

Technology | May 17, 2006

Aluminum Nitride Light Emitting Diodes with the Shortest Wavelength towards Dioxin, PCB Decomposition Technology

Figure1 Aluminum Nitride, "Shortest Light-Emitting Semiconductor" Nippon Telegraph and Telephone Corporation (NTT) has observed light of 210-nm wavelength from aluminum nitride (AlN) light emitting diodes (LED). Read more »

Technology | Feb 16, 2006

Method May Help Optimize Light-emitting Semiconductors

What do you see in these Rorschach-blot-like images? JILA physicists see the once-hidden electronic behavior of semiconductors. The computer plots show how energy intensity (ranging from low in blue to high in red) varies as electronic structures called excitons absorb laser light and emit energy at various frequencies. The pair of similar "butterflies" indicates that an exciton is absorbing and emitting energy in a predictable pattern. Physicists at JILA have demonstrated an ultrafast laser technique for "seeing" once-hidden electronic behavior in semiconductors, which eventually could be useful in more predictable design of optoelectronic devices, including semiconductor lasers and white light-emitting diodes. Read more »

FEATURED

Lumileds Maximizes Field Usable Lumens: New LUXEON HL2X LED

Lumileds Maximizes Field Usable Lumens: New LUXEON HL2X LED Lumileds introduces the LUXEON HL2X, the ideal choice for roadway lighting and sports lighting fixtures with the highest flux and efficiency in an industry standard package. "With 318+ lumens at 700 mA and 85°C, LUXEON HL2X delivers more 'field usable lumens' for optical engineers to work with. ... Read more »

EDITORIAL

Australian Associated Press Recently Wrote: Red Light Could Improve Over-40s' Eyesight

Australian Associated Press Recently Wrote: Red Light Could Improve Over-40s' Eyesight A small LED torch that emits deep red light could help improve declining eyesight, scientists have said: A study by University College London, involving a small sample size of 24 people, has shown that staring at long wavelength light for three minutes every day can "significantly improve vision" ... Read more »

EDITORIAL

Signify Invests to Broaden Its UV-C Lighting Portfolio for Professional Disinfection

Signify Invests to Broaden Its UV-C Lighting Portfolio for Professional Disinfection Signify, the world leader in lighting, is increasing its UV-C lighting production capacity and expanding its UV-C product portfolio. The company is leveraging more than 35 years of expertise in UV-C lighting to address the growing global need for the disinfection of air, surfaces and objects. Read more »