Harvesting more power by splitting high-energy photons in two is a near-term possibility, says Richard Friend, Professor of Physics at the Cavendish Laboratory in Cambridge.

In this video for the World Economic Forum's IdeasLab series, Friend discusses how quantum mechanics could improve the efficiency of solar materials, explaining that there is longer-term potential to develop technologies that can manufacture photovoltaics using less material.

He also says the developing world may win the race to embrace solar power: "And it may well be that it’s there that big changes happen.”