Technology news

Tandem solar cells are more efficient

Stacking two solar cells one over the other has advantages: Because the energy is "harvested" in two stages, and overall the sunlight can be converted to electricity more efficiently. Empa researchers have come up with a ...

dateNov 23, 2015 in Energy & Green Tech
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Task force wants even smaller drones registered

An aviation industry task force is recommending that operators be required to register drones weighing as little as a half a pound, a threshold that could include some remote-controlled toys, industry officials said.

dateNov 21, 2015 in Other
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