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Published June 2019 | public
Book Section - Chapter

Luminescent Solar Concentrator Tandem-on-Silicon with above 700mV Passivated Contact Silicon Bottom Cell


Luminescent solar concentrator (LSC) tandem-on-silicon (Si) provides a route towards achieving higher than 30% overall efficiency which can overcome the theoretical efficiency limit of a single junction Si cell. Here, we present optical coupling and performance of high V oc passivated contact Si bottom cell for LSC tandem-on-Si where the top module consists of highly efficient luminophores and an array of micro InGaP cells embedded in a poly (lauryl methacrylate) waveguide. In this device configuration, InGaP cell area coverage is only ~0.5% of the total LSC area which significantly reduces the high cost III-V material usage. The performance of Si sub-cell is investigated under LSC spectrum and is compared against the measurement done under 1 μm thick InGaP filter which mimics the spectrum seen by Si bottom cell in a conventional III-V/Si tandem. V_(oc) of greater than 700 mV has been observed for the passivated contact Si bottom cell in these tandem applications.

Additional Information

© 2019 IEEE. This work is made possible by the Advanced Research Projects Agency for Energy (ARPA-E) U.S. Department of Energy grant under the Micro-scale Optimized Solar-cell Arrays with Integrated Concentration (MOSAIC) award, DEAR0000627. We additionally acknowledge Jinko Cells and Evaporated Coatings Inc. (ECI) in collaboration for providing p-PERC cells and the design and fabrication of the spectrally-selective waveguide filter.

Additional details

August 19, 2023
October 19, 2023