Space solar power systems range in size from the International Space Station with 8 solar arrays producing 84,000 watts all the way down to body-mounted single wafers on individual cubesats. The current state-of-the-art relies on multi-junction gallium arsenide or inverted metamorphic cells affixed to rigid structural panels. The need for a low-mass, high energy output solar array for space applications is evident. Of the numerous technologies showing promise to reduce space solar power system cost and weight, thin film technologies show the most promise, specifically thin-film devices made from Organic Photovoltaic (OPV) materials. VectorSum and Colorado State University (CSU) have teamed up to investigate a large number of the latest candidate OPVs, substrates, and up-scaling methods. Along with a concept for a novel deployment system, the team will provide an OPV solar array capable of generating 200W at 12V in a pre-launch storage volume of less than 1U cubesat volume (6cm x 10cm x 10cm) and < 0.5kg. The solar array design is a unique solution of deployable folding substrates, laser welding, proprietary pultruded carbon rods, all deployed using simple clock springs, and mounted on a gimbaled platform for solar tracking.
Benefits: The significance of the Phase I results is that we will create a catalog of numerous organic material combinations, and characterized their susceptibility to the space radiation environment. Using this information, we will design a high fidelity ground test unit representative of a flight system for Phase II.
Keywords: Organic electron acceptors, nanosat deployment mechanisms, robust organic photovoltaics (OPV), radiation hardness, thermally-stable fluorinated electron acceptors, efficient OPV-device scale-up, multiple OPV-panel integration, radiation-tolerant OPV active layers
