Magnolia Solar Inc. demonstrated indium/gallium/arsenide (InGaAs) quantum well solar cells that operate at record high voltages.
June 24, 2011 – Marketwire — Magnolia Solar Corporation (OTCBB:MGLT) subsidiary Magnolia Solar Inc. demonstrated indium/gallium/arsenide (InGaAs) quantum well solar cells that operate at record high voltages.
Quantum-structured solar cells capture a wide spectrum of photons at high voltages in a single-junction device, explained Dr. Ashok K. Sood, president and CEO, Magnolia Solar. Low energy-gap wells are embedded in a high energy-gap matrix in quantum well solar cells, enabling ultra-high power conversion efficiencies. In theory, efficienies can approach 45% without solar concentrators, in various environmental conditions. Quantum well solar cells suit use in space and defense applications, as well as integration into concentrated photovoltaics (CPV) solar panels in terrestrial, commercial installations.
Magnolia Solar is working to enhance the open circuit voltage of InGaAs quantum well solar cell structures via a patent-pending device structure. Historically, quantum structured solar cells have been unable to incorporate low energy-gap material without severely degrading the photovoltaics system’s operating voltage, explained Dr. Roger E. Welser, Magnolia Solar Inc. CTO. Magnolia Solar was able to achieve high open circuit voltages with a “novel III-V material structure with an extended wide band gap emitter heterojunction.”
Welser presented the results in “Reducing Non-Radiative and Radiative Recombination in InGaAs Quantum Well Solar Cells” at the 37th IEEE Photovoltaic Specialist Conference (PVSC) in Seattle, WA on June 23, 2011, as part of a special session on Quantum Engineered and Hybrid Devices, and summarized work done in collaboration with colleagues at Kopin Corporation. Dr. Welser also co-chaired a session of the PVSC on the Physics and Engineering of Quantum Well and Super-lattice Devices.
The work presented at the PVSC has been funded by the National Aeronautics and Space Administration (NASA).
Magnolia Solar makes new thin film solar cell technologies that employ nanostructured materials and designs. For more information, please visit www.MagnoliaSolar.com