Light-Weight, Solar Cells with High Specific Power and Conversion Efficiency Navy STTR FY2014.A Sol No.: Navy STTR FY2014.A Topic No.: N14A-T003 Topic Title: Light-Weight, Solar Cells with High Specific Power and Conversion Efficiency Proposal No.: N14A-003-0117 Firm: Agiltron Corporation 15 Presidential Way Woburn, Massachusetts 01801-1040 Contact: Fei Zhang Phone: (781) 935-1200 Web Site: http://www.agiltron.com Abstract: Agiltron in collaboration with National Renewable Energy Laboratory (NREL) will develop a new class of high-efficiency and lightweight broadband inverted metamorphic multi-junction (IMM) solar cells for the uninterrupted flight missions of unmanned aerial vehicles (UAVs). The approach is closely coupled with Agiltron's extensive experience in high-transmittance broadband and wide-angle anti-reflective microstructures and NREL's significant progress in high efficiency IMM solar cells to push the cell's conversion efficiency performance well beyond the current state-of-the-art. The novel solar cells will be transferred from thick, heavy, and stiff substrates to a thin, light and flexible support handle by epitaxial lift-off process, thus meeting the NAVY's specific-power requirement. This novel solar cell technique has several unique advantages over conventional approaches, including high conversion efficiency, high specific power, wide incident angle acceptance, broad band operation, low cost, and high flexibility, without engineering trade-offs. The technical approach will be proven in Phase I through numerical analysis, simulations and experiments. The solar cell array prototype will be designed, fabricated, characterized, and delivered to the Navy in Phase II. Benefits: The proposed light and efficient solar cells will provide clean, cheap, and reliable renewable energy for heating, lighting, communications and electrical power and has numerous direct and indirect DOD and civilian applications such as UAV, ground vehicles, space vehicles, satellite, and various portable and wearable electronic devices. Return