Some of the most promising solar cells today use light-harvesting films made from perovskites – a group of materials that share a characteristic molecular structure. However, perovskite-based solar cells use expensive “hole-transporting” materials, whose function is to move the positive charges that are generated when light hits the perovskite film. Publishing in Nature Energy, EPFL scientists have now engineered a considerably cheaper hole-transporting material that costs only a fifth of existing ones while keeping the efficiency of the solar cell above 20{e533b13ff70ae9e93b2537162b40cc94235d9ebe58cd3c48afaf7e201b9cf588}.
January 25, 2016 | Originally published by Date Line: January 25 on
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