Researchers from KU Leuven, the University of Strasbourg, and CNRS have discovered a new phosphor that could make next-generation fluorescent and LED lighting even cheaper and more efficient. The team used highly luminescent clusters of silver atoms and the porous framework of minerals known as zeolites.
Silver clusters consist of just a few silver atoms and have remarkable optical properties. However, current applications are limited, because the clusters tend to aggregate into larger particles, thus losing the interesting optical properties.
Professor Hofkens and his team from the Molecular Imaging and Photonics Unit have now found a way to keep the silver clusters apart by inserting them into the porous framework of zeolites. The result: stable silver clusters that maintain their unique optical properties.
Microalgae consist of single cells but are capable of producing everything from food to fuel with the help of tailor-made LED-lighting.
“We’re working to synthesise raw materials for biofuels, cosmetics and health food, and ingredients which can replace fish oil in fish farm feed, by means of so-called phototrophic production using algae,” says Andreas Hagemann, a SINTEF research scientist.
“We extract Omega 3 fatty acids from fish which absorb them from their food, such as small crustaceans, and which in turn have obtained them by grazing on microalgae”, he says.
Hagemann is standing in his lab in Trondheim, Norway, beside something which looks like a glowing advertising sign, but which in fact consists of small light panels covered with light-emitting diodes.
According to statistics, the majority of accidents occur at dusk or at night – poor visibility is often the trigger. Intelligent headlights adapt to the current traffic situation, and can be a remedy. In collaboration with industry partners, Fraunhofer researchers have developed a high-resolution illumination system with more than 1,000 LED pixels: It offers considerably more options for precise light distribution than previous solutions have and is also energy efficient.
Out at night on a winding country road. It‘s raining and, to make matters worse, the headlights from the driver behind you are blinding. This is unpleasant and may, at worst, lead to an accident. Modern headlights make nighttime driving safer by adjusting the light distribution to the current traffic situation: While they illuminate specific areas in a targeted fashion, they do not blind other road users.
Researchers at the Fraunhofer Institute for Reliability and Microintegration IZM in Berlin have collaborated with Infineon, Osram, Hella and Daimler in the composite project AFS to develop an adaptive front lighting system:
Learn more: Better visibility when driving at night