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Proceedings Paper

Mirrors for efficient energy conversion in optoelectronics (Conference Presentation)
Author(s): Zunaid Omair; Luis M. Pazos-Outon; Eli Yablonovitch

Paper 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 devices. Now we report that the rear mirror can be used to create thermophotovoltaic systems with unprecedented high efficiency. This mirror reflects low-energy infrared photons back into the heat source, recovering their energy. This radically improves thermophotovoltaic efficiency. Therefore, the rear mirror serves a dual function; boosting the voltage and re-using infrared thermal photons. This allows the possibility of a practical >50% efficient thermophotovoltaic system. Based on this reflective rear mirror concept, we recently experimentally demonstrated a thermophotovoltaic efficiency of 29.1%, a new efficiency record. In this work,

Paper Details

Date Published: 9 March 2020
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Proc. SPIE 11298, Photonic Heat Engines: Science and Applications II, 112980J (9 March 2020); doi: 10.1117/12.2543918
Show Author Affiliations
Zunaid Omair, Univ. of California, Berkeley (United States)
Luis M. Pazos-Outon, Univ. of California, Berkeley (United States)
Eli Yablonovitch, Univ. of California, Berkeley (United States)


Published in SPIE Proceedings Vol. 11298:
Photonic Heat Engines: Science and Applications II
Denis V. Seletskiy; Richard I. Epstein; Mansoor Sheik-Bahae, Editor(s)

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