Stanford engineers have developed a transparent silicon overlay that can increase the efficiency of solar cells by keeping them cool. The cover collects and then radiates heat directly into space, without interfering with incoming photons. If mass-produced, the development could be used to cool down any device in the open air – for instance, to complement air conditioning in cars.
One of the challenges facing designers of traditional flat solar panels
is the fact that the sun doesn't conveniently stay in one place. This
means that in order for a panel to receive as much sunlight as possible,
it has to pan with the sun as it moves across the sky. While
there are motorized assemblies designed to do just that, they add
complexity, weight and expense to photovoltaic systems. Now, however,
University of Michigan scientists have developed a simpler alternative –
and it's based on the ancient Japanese cut-paper art of kirigami.
If you’ve ever scanned the comments section on an electric car or bike article, you’ll be familiar with this complaint: "that’s not green, it’s just a coal-powered vehicle." Well, not this one. The Immortus is an electric car built to generate its own power through some 7 sq m (75 sq ft) of solar photovoltaic paneling. You can charge its battery off the mains if you have to, but if conditions are sunny, the inbuilt solar panels alone will let you drive at more than 60 km/h (37 mph) for an unlimited distance.