Dye-sensitized solar cells used in low-light conditions could perform more consistently thanks to improved understanding of the role additives play in optimizing electrolytes. Laptops and mobile phones, among other devices, could be charged or powered indoors, away from direct sunlight, using dye-sensitized solar cells (DSCs), which have achieved efficiencies of up to 34% at 1000 lux from a fluorescent lamp.   Copper-based electrolytes containing various combinations of additives have been used to achieve these efficiencies, with varying results to date.   Interaction of these additives with the copper species in the electrolyte has been a concern over the last few years, and progress has been undermined by a lack of understanding about the true effect of the different additives.   Now, research funded by the Australian Center for Advanced Photovoltaics (ACAP) and supported by the ARC Center of Excellence in Exciton Science, has demonstrated th