Take a leaf out of nature's book to tap solar power

 作者:南郭拯     |      日期:2019-03-02 02:11:00
By Duncan Graham-Rowe IN JUST one hour enough solar energy reaches Earth’s surface to meet all of our energy needs for an entire year. If we could come up with a way to harness this sunlight efficiently, it would solve all our energy problems at a stroke. The trouble is: we are barely even beginning to exploit the full potential of solar energy. Solar cells only utilise a narrow range of frequencies,