Nanostructure enhanced near-field radiative heat transfer and designs for energy conversion devices

Bingnan Wang; Chungwei Lin; Koon Hoo Teo

doi:10.1117/12.2274348

27 September 2017 Nanostructure enhanced near-field radiative heat transfer and designs for energy conversion devices

Bingnan Wang, Chungwei Lin, Koon Hoo Teo

Proceedings Volume 10369, Thermal Radiation Management for Energy Applications; 103690G (2017) https://doi.org/10.1117/12.2274348
Event: SPIE Optical Engineering + Applications, 2017, San Diego, California, United States

Abstract

Near-field radiative heat transfer can exceed the blackbody limit, and this property has been explored toward energy transfer and conversion applications, such as thermophtovoltaic (TPV) devices, radiative cooling devices, and thermoradiative (TR) devices. The coupling of resonant modes between two surfaces is important in near- field heat transfer and near-field TPV and TR systems. It was shown that the coupling of resonant modes enhances the transmissivity between two coupled objects, which further determines the radiative heat transfer and energy conversion. Surface plasmon polaritons (SPPs), which are surface resonances existing on metal surfaces, are commonly used for such systems. While the frequency of SPP resonance is fixed for a planar emitter, a nanostructured emitter supports additional resonances such as SPP or cavity modes with lower frequencies that are closer to the bandgap energy of a typical PV cell. We show that the nanostructured designs significantly improves the near-field radiative power transfer, and electric power output for a TR system.

Citation Download Citation

Bingnan Wang, Chungwei Lin, and Koon Hoo Teo "Nanostructure enhanced near-field radiative heat transfer and designs for energy conversion devices", Proc. SPIE 10369, Thermal Radiation Management for Energy Applications, 103690G (27 September 2017); https://doi.org/10.1117/12.2274348

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KEYWORDS

Near field

Nanostructuring

Radiative energy transfer

Solar cells

Solar energy

Spiral phase plates

Black bodies

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