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Photovoltaic

Using solar energy to split water into its component parts, thereby allowing the solar energy to be stored as hydrogen fuel, generally involves one of two methods: using photoelectrochemical cells to directly split the water, or using solar cells to produce electricity to power an electrolyzer that separates the water molecules. One problem associated with the latter method is that it currently relies on rare metals. But now scientists from Ecole Polytechnique Federale de Lausanne (EPFL) in Switzerland have managed to do so using common materials, and have achieved a record solar energy to hydrogen conversion efficiency in the process. Read More
Spray-on cells hold considerable promise for reducing the manufacturing costs of solar power. Within this field, colloidal quantum dots (CQD) have also been the focus of a number if research efforts, as they have the potential to soak up a wider range of the solar spectrum. Scientists at the University of Toronto have been aboard the quantum dot train for some time now and their latest breakthrough involves a new method for spraying solar cells onto flexible surfaces, a development that could one day see them coat anything from bicycle helmets to outdoor furniture. Read More
Solar researchers working at the University of New South Wales claim to have produced a system that converts over 40 percent of incoming sunlight into electricity, thereby taking the title of highest solar efficiency for a photovoltaic system ever reported. Read More
We first came across the idea of solar-powered Bluetooth headphones back in 2009. Five years later, the proliferation of Bluetooth LE and the capability of today's solar cells has given London-based startup Exod the tools needed to turn the concept into reality. With its Helios headphones, the company is dangling the prospect of a dangle-free listening experience in front of mobile music lovers. Read More
Solar panels are seen as a way of making buildings greener and more sustainable, as well as making them less dependent on the grid for power. The problem is that the blue/black panels stick out like sore thumbs and end up exiled to rooftops. With the goal of making solar panels aesthetically invisible, the Swiss private, nonprofit technology company CSEM has developed what it bills as the world's first white solar modules – designed to blend into buildings instead of sitting on the roof. Read More
Looking rather like a 10-meter (33 ft) tall sunflower, IBM's High Concentration PhotoVoltaic Thermal (HCPVT) system concentrates the sun’s radiation over 2,000 times on a single point and then transforms 80 percent of that into usable energy. Using a number of liquid-cooled microchannel receivers, each equipped with an array of multi-junction photovoltaic chips, each HCPVT can produce enough power, water, and cooling to supply several homes. Read More
Researchers working at Michigan State University have created a completely transparent solar collector which is so clear that it could replace conventional glass in windows. The new devices – dubbed transparent luminescent solar concentrators – have the potential to not only turn windows into solar electric generators, but the screens of smartphones, vehicle glazing, and almost anything else that has a see-through surface. Read More
The world of modern technology is one of out with the old, in with the new. For battery technology, that means the expected demise of lead-acid batteries and replacement by a more efficient, cheaper, and environmentally-friendly alternative. This is good news, but leaves the problem of what to do with all the lead in the batteries currently in use when the time comes to dispose of them? Researchers at MIT have an answer – use it to make solar cells. Read More
Researchers at the University of Sheffield in the UK have created a spray-on solar cell that uses perovskite as the light-absorbing layer. Although the cell's efficiency is only a modest 11 percent, it can be manufactured very cheaply, paving the way for significant reductions in the cost of large-scale solar panel production. Read More
Photovoltaic cells are one of the more promising alternative energy sources. Mechanically they are very simple, with no moving parts, and are clean and emission-free. Unfortunately they are also inefficient. One of the reasons for this is that they overheat, a problem that a Stanford University team under electrical engineering professor Shanhui Fan is addressing with the development of a thin glass layer that makes solar cells self-cooling. Read More
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