The majority of satellites in space are powered by solar panels and improving their efficiencies means more power for the spacecraft.This project investigates a novel multi-junction solar cell design that uses lattice-matched II/VI (ZnCdMg)(SeTe) and III/V AlGaAsSb direct bandgap materials grown on GaSb substrates. The combination of these materials uniquely offers very broad wavelength coverage, from UV to IR and promises to increase their power generation capabilities The project will be divided into four key tasks: 1) Detailed device design and modeling, 2) Study and optimization of the MBE growth of the dissimilar materials; 3) Materials structural, electrical, and optical characterization, and 4) Device feasibility demonstration. The team has reached out to domestic solar cell companies and research institutions, such as Boeing-Spectrolab and Emcore. After the successful development of the materials and demonstration of prototype devices, the technology will be transferred to US companies for further product development and commercialization.