27 October 2017 Near-field thermophotovoltaic system design and calculation based on coupled-mode analysis
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Abstract
The coupling of resonant modes between two surfaces is important in near-field heat transfer and near-field thermophotovoltaic (TPV) systems. Recently, coupled-mode theory (CMT) has been developed for the analysis and optimal design of TPV systems. We use CMT to analyze the “emitter-vacuum-PV cell” configuration and quantitatively show how the emitter of a nanostructure can drastically improve the near-field TPV device performance. The key feature of the nanostructure is the additional geometry-induced resonant mode, whose energy is lower than the original surface plasmon polariton resonant frequency and much closer to the bandgap of the PV cell. Specifically, we show that, with a simple grating structure, the generated power density of a TPV cell is increased from 13 to 34    W / cm 2 when the PV cell is fixed at 300 K and the emitter is at 1000 K. The increase is over 20 times higher when both planar and grating emitters are at a lower temperature of 500 K.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Bingnan Wang, Chungwei Lin, Koon Hoo Teo, "Near-field thermophotovoltaic system design and calculation based on coupled-mode analysis," Journal of Photonics for Energy 7(4), 044501 (27 October 2017). https://doi.org/10.1117/1.JPE.7.044501 . Submission: Received: 29 July 2017; Accepted: 10 October 2017
Received: 29 July 2017; Accepted: 10 October 2017; Published: 27 October 2017
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