Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 163, Issue -, Pages 98-104Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solmat.2017.01.022
Keywords
Thermophotovoltaic; Spectral control; Refractory plasmonic; Metamaterial
Funding
- MOE of Singapore research [R-265-000-460-112]
- National Natural Science Foundation of China [51206066]
- China Scholarship Council [2011606004]
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Refractory materials based frequency selective emission/absorption is extremely encouraging for various applications, especially the combustion based thermophotovoltaics (TPV) and solar-TPV systems. The frequency selective emitters/absorbers also face the challenges of robust operation at elevated temperatures. Here, we report titanium nitride based thermal stable emitters/absorbers with good selectivity in the near infrared wavelength range. The titanium nitride nanocavitity array provides high emissivity/absorptivity at the desired short wavelength range but suppressed emissivity/absorptivity at the long wavelength range, and this design could be used to obtain high power density of the TPV system. The cut-off wavelength could be adjusted by encapsulating the cavities with different dielectrics. Meanwhile, the encapsulating layer protects the nanocavity structure from deformation at high temperatures. The thermal stability at 1073 K and 1273 K for two hours in Argon was demonstrated for the encapsulated nanocavity structure.
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