Scalable semitransparent organic PV modules could turn windows into power generators

Organic solar modules score points for their flexibility, transparency, and a particularly good environmental footprint. Wavelength-dependent transparency, in particular, is a major strength of organic photovoltaics. Researchers at the University of Freiburg and the Fraunhofer Institute for Solar Energy Systems ISE have now succeeded in building 14.5 by 14.5- centimeter organic PV modules with an average transparency of 43.2% and an efficiency of up to 9.26%. To achieve this, they used a combination of sputtering and slot-die coating—both processes that are industrially proven and highly scalable to large module areas.