A rear mirror to reflect band-edge luminescence helped break the world record for solar cell efficiency, 28.8%. It serendipitously reflects all infrared wavelengths, which can revolutionize thermo-photovoltaics. This enables conversion from heat to electricity with >50% efficiency.
Zunaid Omair, Gregg Scranton, Luis Pazos, T. Patrick Xiao, Myles A. Steiner, Vidya Ganapati, Per F. Peterson, J. F. Holzrichter, Harry A. Atwater, Eli Yablonovitch
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