التفاصيل البيبلوغرافية
| العنوان: |
Impacts of propagating, frustrated and surface modes on radiative, electrical and thermal losses in nanoscale-gap thermophotovoltaic power generators. |
| المؤلفون: |
Bernardi, Michael P., Dupré, Olivier, Blandre, Etienne, Chapuis, Pierre-Olivier, Vaillon, Rodolphe, Francoeur, Mathieu |
| المصدر: |
Scientific Reports; 6/26/2015, p11626, 1p |
| مصطلحات موضوعية: |
NANOELECTROMECHANICAL systems, THERMOPHOTOVOLTAIC cells, GALLIUM antimonide, ELECTRIC generators, RADIATORS |
| مستخلص: |
The impacts of radiative, electrical and thermal losses on the performances of nanoscale-gap thermophotovoltaic (nano-TPV) power generators consisting of a gallium antimonide cell paired with a broadband tungsten and a radiatively-optimized Drude radiator are analyzed. Results reveal that surface mode mediated nano-TPV power generation with the Drude radiator outperforms the tungsten radiator, dominated by frustrated modes, only for a vacuum gap thickness of 10 nm and if both electrical and thermal losses are neglected. The key limiting factors for the Drude- and tungsten-based devices are respectively the recombination of electron-hole pairs at the cell surface and thermalization of radiation with energy larger than the cell absorption bandgap. A design guideline is also proposed where a high energy cutoff above which radiation has a net negative effect on nano-TPV power output due to thermal losses is determined. It is shown that the power output of a tungsten-based device increases by 6.5% while the cell temperature decreases by 30 K when applying a high energy cutoff at 1.45 eV. This work demonstrates that design and optimization of nano-TPV devices must account for radiative, electrical and thermal losses. [ABSTRACT FROM AUTHOR] |
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