UK firm's solar power breakthrough could make world's most efficient panels by 2021

Oxford PV says tech based on perovskite crystal can generate almost a third more electricity

British rooftops could be hosting a breakthrough in new solar power technology by next summer, using a crystal first discovered more than 200 years ago to help harness more of the sun's power.

An Oxford-based solar technology firm hopes by the end of the year to begin manufacturing the world's most efficient solar panels, and become the first to sell them to the public within the next year.