Multilayer structures with highly directional absorptivity for solar thermophotovoltaics

Document Type

Conference Proceeding

Publication Date

11-4-2013

Abstract

We explore an approach to enhance the eficiency 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 SPIE.

Publication Source (Journal or Book title)

Proceedings of SPIE - The International Society for Optical Engineering

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