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GreenLight News
Recycling: From Leftovers to LED Lights
Nov 30, 2015 — Light-emitting diodes (LEDs), such as those found ubiquitously in holiday lights, television sets and other devices, now have been fabricated from food and soft-drink waste. Researchers at the University of Utah in Salt Lake City have found a method to turn food waste such as discarded pieces of tortilla into carbon dots (CDs), a type of quantum dot (QD), which are then turned into a material for use in LEDs. Their synthesis process could be an environmentally sustainable alternative to
A Cooling Layer for Solar Cells
Oct 28, 2015 — Taking advantage of the limitless cold of the universe, a transparent overlay could enable solar cells to convert more photons into electricity. As solar cells heat up in the sunlight, they become less efficient. The overlay helps cool solar cells...
NASA Technology Aims to Save the Forests
Oct 6, 2015 — Ravenous insects that are smaller than a penny continue to migrate north from the southeast U.S., threatening to destroy millions of pine and ash trees in the northeastern part of the country. NASA scientists have teamed with the U.S. Forest Service...
VIS Light, Photocatalyst Deconstruct BPA
Sep 1, 2015 — A hybrid photocatalyst that can break down bisphenol A (BPA) using visible light could eventually be used to help safely dispose of the widely used chemical. Because BPA doesn’t degrade easily, it can potentially cause harm to humans and the...
Cool Roof Material Eases Energy Demands
Jul 29, 2015 — The sun over Australia is notoriously brutal, with consistently high UV index levels. This demands air conditioners and fans, heightening most buildings’ power needs at a time when saving energy is a top priority for many. A new roofing...
Century-Old Landmark Gets an Energy Boost
Jun 26, 2015 — It has been more than 125 years since the grander-than-life Eiffel Tower was first designed and constructed in Paris. It officially entered the 21st century in recent months, thanks to a project meant to push a significant reduction in its...
Solar Array Turns CO
2
into Useful Chemicals
May 28, 2015 — Efforts abound in the interest of shrinking our carbon footprint and making Earth a healthier place. Recycling paper, plastic and other materials helps, but what if we could take it a step farther and repurpose carbon dioxide emissions? Scientists...
Oceans, Atmosphere the Focus of New NASA Mission
Apr 27, 2015 — A satellite mission scheduled for launch in 2022 is expected to give NASA a whole new understanding of Earth’s ocea ns and atmosphere, further advancing the study of the impact environmental changes are having on ocean health and the...
Light-Based Technology Aids Insect Control
Apr 2, 2015 — Insects wreak havoc on communities with their spread of viruses and airborne diseases. They damage and even kill crops. And let’s face it: They’re just plain annoying. There has been some relief in a “photonic fence” device,...
Laser Pulse Combo Sniffs Out Trace Toxic Gases
Feb 13, 2015 — A combination of IR laser pulses and terahertz radiation (T-ray) is giving scientists a nose-up on toxic gases. This technology can sniff out even trace amounts of harmful gases in the air – such as from a chemical spill or nerve gas attack...
Lens Arrays Could Enable Rooftop Solar Concentrators
STATE COLLEGE, Pa., Feb. 6, 2015 — Tiny solar cells sandwiched between lens arrays could bring the promise of concentrator photovoltaics (CPVs) down to a consumer scale. “Current CPV systems are the size of billboards and have to be pointed very accurately to track the sun...
Sunlight, Nanoparticles Break Down Pollutants
Jan 16, 2015 — Endocrine disruptors mimic or block hormones, interfering with humans’ and animals’ reproductive organs, and causing other health problems. A class of pollutants that negatively affects hormones can be broken down using nanoparticles and...
SRS Probes Inner Workings of Solar Panels
Oct 6, 2014 — Using femtosecond stimulated Raman spectroscopy (SRS), scientists have now probed the inner workings of plastic solar panels. The findings could further efforts to improve solar panels and broaden their use, according to a team at the University of...
Laser System to Measure Air Pollution from Space Station
GREENBELT, Maryland, Sept. 9, 2014 — A laser system aboard the International Space Station will help scientists track pollution in the atmosphere.
Tofu Chemical Could Prompt New Wave of Solar Cells
Sep 4, 2014 — Solar cells could learn a thing or two from tofu and bath salts. Researchers from the Stephenson Institute for Renewable Energy at the University of Liverpool in England have found that magnesium chloride (MgCl2) – found in tofu, bath salts...
Fluorescence Lifetime Measurement Enhances Recycling
MUNICH, Aug. 22, 2014 — Sorting plastics using fluorescence lifetime measurement could simplify and speed up the recycling process. Developed by a team from Ludwig Maximilian University of Munich, the technique takes advantage of the intrinsic fluorescence properties found...
Tin Replaces Lead in Promising Solar Cell
EVANSTON, Ill., May 12, 2014 — A new solar cell promises enhanced efficiency and a smaller environmental footprint. The new cell, developed by a team from Northwestern University, uses a perovskite structure composed of tin instead of the traditional lead as the light-absorbing...
UV Takes Water Treatment Chemical-Free
STUTTGART, Germany, May 2, 2014 — A new UV process quickly breaks down pollutants in wastewater without help from chemical catalysts. The system uses 172-nm light to trigger photolysis, splitting H2O molecules into highly reactive hydroxyl radicals. “These hydroxyl compounds...
Solar Cell by Day, Light Panel by Night
SINGAPORE, March 25, 2014 — A chance discovery has brought light emission properties to solar cells. A new solar cell material developed by a team at Nanyang Technological University (NTU) not only converts light to electricity, but also emits light. The hybrid perovskite...
Tapping solar’s full potential
Mar 7, 2014 — Solar cells may be a little closer to full realization of their potential, thanks to the creation of large sheets of nanotextured silicon microcell arrays. The discovery promises to make solar cells lightweight, bendable, more efficient and easily...
Elusive Solar Light-Trapping Limit Nearly Reached
DELFT, Netherlands, Feb. 27, 2014 — The theoretical limit of light-trapping in solar cells has eluded researchers for decades. But a group from Delft University of Technology (TU Delft) has come closer to it than anyone else. The researchers, members of TU Delft’s Photovoltaic...
'Inverse Opal' Structure Enhances Solar Cell Efficiency
WEST LAFAYETTE, Ind., Jan. 23, 2014 — A technology called “photonic crystals” could increase the light-trapping capability of thin-film solar cells and help bring about lower-cost solar energy. Researchers from Purdue University’s Birck Nanotechnology Center and School...
Laser Reveals Photosynthetic Processes
ST. LOUIS, Dec. 2, 2013 — Scientists have used an ultrafast laser to study a photosynthetic complex — arguably the most important bit of organic chemistry on the planet — in its complete functioning state. When sunlight strikes a photosynthesizing organism,...
Water stream detects pollution better
Dec 1, 2013 — A microfluidic sensor with a novel design uses unconfined streams of water as a simple, cheap way to test for dangerous chemicals and bacteria in liquid. The pollutant detector, developed in Italy within the framework of the research project...
Water stream makes better pollution detector
Dec 1, 2013 — A new microfluidic sensor uses unconfined streams of water to test for dangerous chemicals and bacteria in liquid simply and cheaply. The pollutant detector was developed in Italy within the framework of the research project ACQUASENSE, and it...
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April 2024
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