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Ultraefficient thermophotovoltaic power conversion by band-edge spectral filtering.


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.

SUBMITTER: Omair Z 

PROVIDER: S-EPMC6681750 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature

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Ultraefficient thermophotovoltaic power conversion by band-edge spectral filtering.

Omair Zunaid Z   Scranton Gregg G   Pazos-Outón Luis M LM   Xiao T Patrick TP   Steiner Myles A MA   Ganapati Vidya V   Peterson Per F PF   Holzrichter John J   Atwater Harry H   Yablonovitch Eli E  

Proceedings of the National Academy of Sciences of the United States of America 20190716 31


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 eff  ...[more]

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