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Published June 2018 | public
Journal Article

A compact spectrum splitting concentrator for high concentration photovoltaics based on the dispersion of a lens


Photovoltaic devices used in conjunction with functional optical elements for light concentration and spectrum splitting are known to be a viable approach for highly efficient photovoltaics. Conventional designs employ discrete optical elements, each with the task of either performing optical concentration or separating the solar spectrum. In the present work, we examine the performance of a compact photovoltaic architecture in which a single lens plays a dual role as both a concentrator and a spectrum splitter, the latter made possible by exploiting its intrinsic dispersion. A four-terminal two-junction InGaP/GaAs device is prepared to validate the concept and illustrates pathways for improvements. A spectral separation in the visible range is demonstrated at the focal point of a plano-convex lens with a geometric concentration ratio of 1104X with respect to the InGaP subcell.

Additional Information

© 2018 IOP Publishing Ltd. Received 19 February 2018; Accepted 5 April 2018; Accepted Manuscript online 5 April 2018; Published 30 April 2018. This work is part of the 'Light-Material Interactions in Energy Conversion' Energy Frontier Research Center funded by the US Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0001293. The authors thank C Corcoran and M Meitl for early discussions on solar cell design and fabrication processes.

Additional details

August 19, 2023
October 18, 2023