A team led by researchers at Lawrence Berkeley National Laboratory (Berkeley Lab) and UC Berkeley has demonstrated an approach for achieving LEDs with near 100% light-emission efficiency at all brightness levels.
LEDs are commonly used for sterilization, and in the continued effort to combat the coronavirus pandemic, LEDs can also help inactivate SARS-CoV-2. A team in Pakistan designed far-ultraviolet LEDs at a targeted wavelength of 222 nanometers, chosen both for its ability to inactivate the virus and for being safe on human skin. They based their design on the material aluminum gallium nitride, part of a set of materials called III-nitrides which are efficient, inexpensive, and environmentally friendly.
As more devices require recharging their batteries, researchers are looking to ambient lighting as a potential source of generating small amounts of power for indoor devices. The researchers used one lighting source, a white LED akin to normal brightness for indoor lights, to test three different modules — a gallium indium phosphide semiconductor, a gallium arsenide semiconductor, and a silicon semiconductor. The light source peaked in intensity on the shorter wavelengths of light.
Smart LED light bulbs for the elderly, the latest innovation from Chula and its partners, can do more than emitting light. They enhance the contrast among the primary colors of light thereby improving visibility and reducing accidents in the elderly. The product is expected to hit the market in May.
As biofuels continue to present challenges, microalgae are gaining momentum as a biofuel energy crop. In the Journal of Renewable and Sustainable Energy, researchers show how a combination of monochromatic red and blue LED illumination on one type of microalga can enhance its growth and increase the biosynthesis of critical components, such as lipids, for microalgae feedstock development. The researchers focused on Dunaliella salina, typically extracted from sea salt fields and found in salt lakes.
The Electrochemical Society (ECS) is proud to congratulate the 2021 Queen Elizabeth Prize for Engineering winners, Isamu Akasaki, Shuji Nakamura, Nick Holonyak, Jr., M. George Craford, and Russell Dupuis. The 2021 prize acknowledges their contributions from the initial creation and development of LED lighting its applications.
The State University of New York has awarded grants of up to $10,000 to three teams at Binghamton University to pursue research projects related to COVID-19.
Engineers have invented a way to spray extremely thin wires made of a plant-based material that could be used in N95 mask filters, devices that harvest energy for electricity, and potentially the creation of human organs. The method involves spraying methylcellulose, a renewable plastic material derived from plant cellulose, on 3D-printed and other objects ranging from electronics to plants, according to a Rutgers-led study in the journal Materials Horizons.
A personal, handheld device emitting high intensity ultraviolet light to disinfect areas by killing the Corona virus is now feasible, according to researchers at Penn State, the University of Minnesota and two Japanese universities.
Sandwiching a 2-D light-emitting layer between ring-shaped carbon compounds significantly improved device efficiency and brightness.
While LED lighting can enhance plant growth in greenhouses, standards are needed to determine the optimal intensity and colors of light, according to Rutgers research that could help improve the energy efficiency of horticultural lighting products.