Aug
2
Solving the Last Big LED Problem
August 2, 2013 | 1 Comment
Rensselaer Polytechnic Institute researchers have identified the mechanism behind a plague of LED light bulbs. The problem is called “efficiency droop” that causes LEDs to lose up to 20 percent of their efficiency as they are subjected to greater electrical currents. Efficiency droop, first reported in 1999, has been a key obstacle in the development […]
Aug
1
5 Percent Efficient Solar Powered Hydrogen Production
August 1, 2013 | 1 Comment
Helmholtz-Zentrum Berlin (HZB) and TU Delft scientists have successfully stored nearly five percent of solar energy chemically in the form of hydrogen using a simple solar cell and a photo anode made of a metal oxide. This is a major accomplishment as the design of the solar cell is much simpler than that of the […]
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