3 October 2012 Lattice-matched multijunction solar cells employing a 1 eV GaInNAsSb bottom cell
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Abstract
Over the past 15 years, tremendous effort has been put forth into increasing the efficiency of multijunction solar cells used in concentrator photovoltaics (CPV) systems. Because the cell represents a small portion of the total CPV system cost, modest improvements in cell efficiencies have a large impact on reducing the levelized cost of electricity. To address the need for higher efficiency CPV cells, Solar Junction is currently manufacturing a lattice-matched multijunction solar cell that employs a 1 eV GaInNAsSb bottom subcell in lieu of the traditional Ge subcell. Our standard 5.5  mm 2 product has recently achieved a world record in power conversion efficiency. In this article, we report on the design, performance, and integration of this high-performance cell. The importance of overdriving the GaInNAsSb bottom subcell is discussed in addition to the optimization of the anti-reflection coating used for cells under glass secondary optics.
© 2012 Society of Photo-Optical Instrumentation Engineers (SPIE)
Daniel Derkacs, Rebecca Jones-Albertus, Ferran Suarez, Onur Fidaner, "Lattice-matched multijunction solar cells employing a 1 eV GaInNAsSb bottom cell," Journal of Photonics for Energy 2(1), 021805 (3 October 2012). https://doi.org/10.1117/1.JPE.2.021805 . Submission:
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