Hot electrons could double solar cell efficiency

时间:2017-09-16 04:01:09166网络整理admin

By Anil Ananthaswamy SOLAR cells could see a boost in their theoretical maximum efficiency from 31 per cent to 66 per cent, thanks to a novel way of harnessing electrons whose energy is normally lost as heat. The most efficient silicon solar cells turn 25 per cent of the incoming light into electricity, but even with further improvements these cells will reach a theoretical limit at 31 per cent, because incoming light creates large numbers of extremely energetic electrons that lose energy to their surroundings in just a picosecond – too rapidly to be harnessed. In 2001,