Scientists at the University of Cambridge in the UK have found a way to improve the efficiency of photovoltaic cells by as much as 25% through harnessing more of the sun’s spectrum than most traditional silicon-based solar cells can.
The new design, developed at the university’s Cavendish Laboratory in the Department of Physics, can absorb both red and blue light, and generates electrons from photons at a two-to-one ratio on the blue light spectrum. Most current solar cells lose blue photon energy as heat, leaving them unable to turn more than about 34% of the sunlight they absorb into power.