SoFab Inks LLC, a startup consisting of University of Louisville graduate students and mentored by UofL faculty members, is a finalist in the U.S. Department of Energy’s American-Made Perovskite Startup Prize. From left, Craig Grapperhaus, professor of chemistry, graduate students Sashil Chapagain, Blake Martin and Peter Armstrong and Thad Druffel, research theme leader. Photo by Andrew Marsh.