DuPont’s Kapton colorless polyimide film, a new material currently in development for use as a flexible superstrate for cadmium telluride thin film photovoltaic modules, has enabled a new world record for energy conversion efficiency. A Swiss team has now demonstrated a conversion efficiency of 13.8 percent using the new colorless film, leapfrogging their previous record of 12.6 percent and nearing that of glass.