Abstract
Solar-driven electrochemical devices, such as PV-electrolyzers and photoelectrochemical (PEC) devices, contain multiple components which can make it difficult to pinpoint the failing piece when overall device performance is degrading. The current-voltage analysis tool for solar fuel production (CATS) is a free app that analyzes current-voltage data collected during operation, parameters that are easily accessible for many devices of interest. The program captures the time-dependence of loss mechanisms at play during PEC device operation and opens the door for real-time optimizations of operational parameters like the feed humidity to minimize performance losses. Aside from the possibility of deconvoluting loss mechanisms, this software can also reveal possible performance benefits, such as by convective PV cooling when the photoabsorber is integrated into the electrolysis cell.
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