Solar photovoltaic (PV) technology is one of the fastest growing sustainable, renewable energy conversion technologies that can help meet the increasing global energy demands. Organic photovoltaic (OPV) technologies are particularly attractive due to their compatibility with low-cost roll-to-roll and printing processing at low temperatures on a wide variety of substrate materials and the lack of scarce or toxic materials rendering them environmentally friendly. OPVs can also benefit from a larger selection of functional materials as the required properties (high semi-conductor mobility, suitable band gap, good intrinsic stability, good barrier properties, etc.) can be tuned by careful design and synthesis.
Currently, the highest cell efficiencies reported in Europe for solution processed single (>9%), double (8.9%) and triple (9.6%) junction cells as well as the lowest water vapor transmission rates for transparent flexible barriers (WVTR 10-6 g/m2/day) were obtained by the partners of MUJULIMA. In this project we show how with new and innovative materials we will increase the module efficiencies (15%) and outdoor stability to make OPVs a commercially competitive viable technology.