Solar power has become the most viable way for powering satellites and other space vehicles. The expense of putting objects into space is highly dependent on weight; the lighter the payload the less expense for the mission. Emcore was awarded a contract from the Air Force Research Laboratory through the American Recovery and Reinvestment Act to develop high efficiency, lightweight multi-junction crystalline solar cells. The award focuses on Emcore?s inverted metamorphic multi-junction (IMM) solar cell technology. This technology is capable of producing solar cells that convert over 33% of the sun?s energy that reaches the earth?s orbit into electrical energy. The IMM solar cell is able to produce the greatest electrical power per weight of any solar cell. Emcore?s deliverables for this contract are to produce large area 35% solar cells for use in space solar panels and small area 37% to enable the development of higher efficiency solar cells in the future. This enabling technology will help in the development of space power for the next century of space exploration.