Thin-film solar cells are a type of photovoltaic technology that, as you might guess from its name, are much thinner than traditional solar cells, able to be used in a far broader range of applications. The problem with traditional thin-film solar technology is that the components used to make them are both highly toxic and incredibly rare, making them unsuitable for more widespread use. This UNSW team is well on the way to changing that, having developed some of the most efficient, non-toxic thin-film cells to date.