Ultraefficient thermophotovoltaic power conversion by band-edge spectral filtering [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 333.79 Energy
• Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Energy Efficiency and Renewable Energy ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2019
• Mô tả vật lý: Size: p. 15356-15361 : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 255623
• Chủ đề: 1. 14 solar energy; 2. 30 direct energy conversion; 3. 36 materials science; 4. Back mirror; 5. Energy; 6. Et al; 7. Photovoltaics; 8. Solar; 9. Thermophotovoltaic; 10. Thermophotovoltaics; 11. Tpv

Tóm tắt

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 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.<
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