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25 September 2013 Multilayer structures with highly directional absorptivity for solar thermophotovoltaics
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Abstract
We explore an approach to enhance the efficiency of solar cells using photonic nanostructures for solar ther-mophotovoltaics. Our focus is on designing photonic nanostructures that can provide broadband absorption in a narrow angular range for solar thermophotovoltaic systems which do not employ sunlight concentration. We consider structures consisting of an aperiodic multilayer stack of alternating layers of silicon and silica on top of a thick tungsten layer. The layer thicknesses are optimized to maximize the angular selectivity in the absorp-tivity for both TE and TM polarizations. Using such an approach, we design structures with highly directional absorptivity for both polarizations.
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Christopher H. Granier, Francis O. Afzal, Georgios Veronis, and Jonathan P. Dowling "Multilayer structures with highly directional absorptivity for solar thermophotovoltaics", Proc. SPIE 8824, Next Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion IV, 88240M (25 September 2013); https://doi.org/10.1117/12.2024773
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