Ultraefficient thermophotovoltaic power conversion by band-edge spectral filtering.

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ID: 54548
2019
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Abstract
Thermophotovoltaic power conversion utilizes thermal radiation from a local heat source to generate electricity in a photovoltaic cell. It was shown in recent years that the addition of a highly reflective rear mirror to a solar cell maximizes the extraction of luminescence. This, in turn, boosts the voltage, enabling the creation of record-breaking solar efficiency. Now we report that the rear mirror can be used to create thermophotovoltaic systems with unprecedented high thermophotovoltaic efficiency. This mirror reflects low-energy infrared photons back into the heat source, recovering their energy. Therefore, the rear mirror serves a dual function; boosting the voltage and reusing infrared thermal photons. This allows the possibility of a practical >50% efficient thermophotovoltaic system. Based on this reflective rear mirror concept, we report a thermophotovoltaic efficiency of 29.1 ± 0.4% at an emitter temperature of 1,207 °C.
Reference Key
omair2019ultraefficientproceedings Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Omair, Zunaid;Scranton, Gregg;Pazos-Outón, Luis M;Xiao, T Patrick;Steiner, Myles A;Ganapati, Vidya;Peterson, Per F;Holzrichter, John;Atwater, Harry;Yablonovitch, Eli;
Journal Proceedings of the National Academy of Sciences of the United States of America
Year 2019
DOI
10.1073/pnas.1903001116
URL
Keywords
energy solar photovoltaics tpv thermophotovoltaics

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