Dr. Jonas Sundqvist, group manager for thin-film technology, with prototype textile-based solar cells. Imagine a truck tarp that can harvest the energy of sunlight! With the help of new textile-based solar cells developed by Fraunhofer researchers, semitrailers could soon be producing the electricity needed to power cooling systems or other onboard equipment. In short, textile-based solar cells could soon be adding a whole new dimension to photovoltaics, complementing the use of conventional silicon-based solar cells.