Light Management in Bifacial Photovoltaics with Spectrally Selective Mirrors

Bryan M. Cote, Ian M. Slauch, Michael G. Deceglie, Timothy J Silverman, Vivian E. Ferry

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Spectrally selective mirrors that simultaneously provide above-bandgap antireflection and sub-bandgap light rejection are tested for their ability to provide passive cooling to partially sub-bandgap transparent bifacial photovoltaics. The optical and thermal benefits of both idealized and real, low-complexity spectrally selective mirrors on single-axis tracking, bifacial PERC arrays under realistic conditions are tested via rigorous finite element simulations. Four- and six-layer mirror designs increased carrier generation beyond what traditional antireflection coatings can provide without the associated cell heating. Idealized mirrors were found to provide up to 2.4 °C of cooling when included on both air/glass interfaces of the bifacial module.

Original languageEnglish (US)
Pages (from-to)5397-5402
Number of pages6
JournalACS Applied Energy Materials
Issue number6
StatePublished - Jun 2 2021

Bibliographical note

Funding Information:
The authors thank Dr. Silvana Ayala for helpful discussions. This material is based upon work supported by the U.S. Department of Energy Office of Energy Efficiency (EERE) under the Solar Energy Technologies Office Award DE-EE0008542. Part of this work was performed with equipment supported by funding from the National Science Foundation through the UMN MRSEC under Award DMR-2011401. The authors acknowledge the Minnesota Supercomputing Institute (MSI) at the University of Minnesota for providing resources that contributed to the research results reported within this paper. This work was authored in part by Alliance for Sustainable Energy, LLC, the manager and operator of the National Renewable Energy Laboratory for the U.S. Department of Energy (DOE) under Contract DE-AC36-08GO28308. Funding was provided by the U.S. Department of Energy’s Office of Energy Efficiency and Renewable Energy (EERE) under Solar Energy Technologies Office (SETO) Agreement 30312 and by the Engineering Research Center Program of the National Science Foundation and under NSF Cooperative Agreement EEC-1041895. The views expressed herein do not necessarily represent the views of the U.S. Department of Energy or the United States government.

Publisher Copyright:


  • antireflection coatings
  • bifacial photovoltaics
  • cooling
  • light management
  • photonic structures
  • solar energy

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