Accurate calibration of thermophotovoltaic efficiency

Omair, Zunaid; Pazos-Outon, Luis M.; Steiner, Myles A.; Yablonovitch, Eli

doi:10.1186/s43074-020-00021-x

Title: Accurate calibration of thermophotovoltaic efficiency

Journal Article · Tue Oct 20 00:00:00 UTC 2020 · PhotoniX

DOI: https://doi.org/10.1186/s43074-020-00021-x · OSTI ID:1678779

; Pazos-Outon, Luis M.; Steiner, Myles A.; Yablonovitch, Eli

Abstract The new record efficiency in Thermophotovoltaics relies upon a highly reflective rear mirror. The excellent rear mirror boosts voltage by enhancing the luminescence extraction, and separately also reflects low energy photons, which would otherwise be useless in thermophotovoltaics. The reflected low energy photons reheat the thermal emitter, and regenerate above-bandgap energy photons. The efficiency calibration for such regenerative thermophotovoltaics depends on several factors, yet predominantly on the accurate measurement of the rear mirror reflectivity. Here, we report on the technique for accurate measurement of mirror reflectivity, and of record thermophotovoltaic efficiency 29.1 ± 0.6%, at 1207 °C.

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Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office

Grant/Contract Number:: AC36-08GO28308; SC0001293

OSTI ID:: 1678779

Report Number(s):: NREL/JA--5900-77609; 21; PII: 21

Journal Information:: PhotoniX, Journal Name: PhotoniX Journal Issue: 1 Vol. 1; ISSN 2662-1991

Publisher:: Springer Science + Business MediaCopyright Statement

Country of Publication:: Singapore

Language:: English

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Title: Accurate calibration of thermophotovoltaic efficiency

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