Large‐Area Ultrabroadband Absorber for Solar Thermophotovoltaics Based on 3D Titanium Nitride Nanopillars

Manohar Chirumamilla; Anisha Chirumamilla; Yuanqing Yang; Alexander S. Roberts; Peter Kjær Kristensen; Krishnakali Chaudhuri; Alexandra Boltasseva; Duncan Sutherland; Sergey I. Bozhevolnyi; Kjeld Pedersen

doi:10.1002/adom.201700552

Large‐Area Ultrabroadband Absorber for Solar Thermophotovoltaics Based on 3D Titanium Nitride Nanopillars

Manohar Chirumamilla, Anisha Chirumamilla, Yuanqing Yang, Alexander S. Roberts, Peter Kjær Kristensen, Krishnakali Chaudhuri, Alexandra Boltasseva, Duncan Sutherland, Sergey I. Bozhevolnyi, Kjeld Pedersen

Research output: Contribution to journal › Journal article › Research › peer-review

129 Citations (Scopus)

Abstract

Broadband absorbers, with the simultaneous advantages of thermal stability,
insensitivity to light polarization and angle, robustness against harsh
environmental conditions, and large area fabrication by scalable methods,
are essential elements in (solar) thermophotovoltaics. Compared to the noble
metal and multilayered broadband absorbers, high-temperature refractory
metal-based nanostructures with low-Q resonators are reported less. In this
work, 3D titanium nitride (TiN) nanopillars are investigated for ultrabroadband
absorption in the visible and near-infrared spectral regions with average
absorptivities of 0.94, over a wide range of oblique angles between 0° and
75°. The effect of geometrical parameters of the TiN nanopillars on broadband
absorption is investigated. By combining the flexibility of nanopillar
design and lossy TiN films, ultrabroadband absorption in the visible and nearinfrared
is obtained. A thin layer of hafnium oxide is deposited to enhance the
thermal stability of TiN nanopillars. Finally, the thermal/spectral stability of
the TiN nanopillars is demonstrated after annealing at 1473 K for 24 h while
retaining their structural features. Thus, the TiN nanopillars can provide
excellent opportunities for high-temperature applications, especially solar
thermophotovoltaics.

Original language	English
Article number	1700552
Journal	Advanced Optical Materials
Volume	5
Issue number	22
Number of pages	8
ISSN	2195-1071
DOIs	https://doi.org/10.1002/adom.201700552
Publication status	Published - Oct 2017

Keywords

3D nanopillars
broadband absorption
high-temperature photonics
titanium nitride
vertical-gap plasmon resonators

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Chirumamilla, M., Chirumamilla, A., Yang, Y., S. Roberts, A., Kristensen, P. K., Chaudhuri, K., Boltasseva, A., Sutherland, D., Bozhevolnyi, S. I., & Pedersen, K. (2017). Large‐Area Ultrabroadband Absorber for Solar Thermophotovoltaics Based on 3D Titanium Nitride Nanopillars. Advanced Optical Materials, 5(22), Article 1700552. https://doi.org/10.1002/adom.201700552

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title = "Large‐Area Ultrabroadband Absorber for Solar Thermophotovoltaics Based on 3D Titanium Nitride Nanopillars",

abstract = "Broadband absorbers, with the simultaneous advantages of thermal stability,insensitivity to light polarization and angle, robustness against harshenvironmental conditions, and large area fabrication by scalable methods,are essential elements in (solar) thermophotovoltaics. Compared to the noblemetal and multilayered broadband absorbers, high-temperature refractorymetal-based nanostructures with low-Q resonators are reported less. In thiswork, 3D titanium nitride (TiN) nanopillars are investigated for ultrabroadbandabsorption in the visible and near-infrared spectral regions with averageabsorptivities of 0.94, over a wide range of oblique angles between 0° and75°. The effect of geometrical parameters of the TiN nanopillars on broadbandabsorption is investigated. By combining the flexibility of nanopillardesign and lossy TiN films, ultrabroadband absorption in the visible and nearinfraredis obtained. A thin layer of hafnium oxide is deposited to enhance thethermal stability of TiN nanopillars. Finally, the thermal/spectral stability ofthe TiN nanopillars is demonstrated after annealing at 1473 K for 24 h whileretaining their structural features. Thus, the TiN nanopillars can provideexcellent opportunities for high-temperature applications, especially solarthermophotovoltaics.",

keywords = "3D nanopillars, broadband absorption, high-temperature photonics, titanium nitride, vertical-gap plasmon resonators",

author = "Manohar Chirumamilla and Anisha Chirumamilla and Yuanqing Yang and {S. Roberts}, Alexander and Kristensen, {Peter Kj{\ae}r} and Krishnakali Chaudhuri and Alexandra Boltasseva and Duncan Sutherland and Bozhevolnyi, {Sergey I.} and Kjeld Pedersen",

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AU - Chirumamilla, Manohar

AU - Chirumamilla, Anisha

AU - Yang, Yuanqing

AU - S. Roberts, Alexander

AU - Kristensen, Peter Kjær

AU - Chaudhuri, Krishnakali

AU - Boltasseva, Alexandra

AU - Sutherland, Duncan

AU - Bozhevolnyi, Sergey I.

AU - Pedersen, Kjeld

PY - 2017/10

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N2 - Broadband absorbers, with the simultaneous advantages of thermal stability,insensitivity to light polarization and angle, robustness against harshenvironmental conditions, and large area fabrication by scalable methods,are essential elements in (solar) thermophotovoltaics. Compared to the noblemetal and multilayered broadband absorbers, high-temperature refractorymetal-based nanostructures with low-Q resonators are reported less. In thiswork, 3D titanium nitride (TiN) nanopillars are investigated for ultrabroadbandabsorption in the visible and near-infrared spectral regions with averageabsorptivities of 0.94, over a wide range of oblique angles between 0° and75°. The effect of geometrical parameters of the TiN nanopillars on broadbandabsorption is investigated. By combining the flexibility of nanopillardesign and lossy TiN films, ultrabroadband absorption in the visible and nearinfraredis obtained. A thin layer of hafnium oxide is deposited to enhance thethermal stability of TiN nanopillars. Finally, the thermal/spectral stability ofthe TiN nanopillars is demonstrated after annealing at 1473 K for 24 h whileretaining their structural features. Thus, the TiN nanopillars can provideexcellent opportunities for high-temperature applications, especially solarthermophotovoltaics.

AB - Broadband absorbers, with the simultaneous advantages of thermal stability,insensitivity to light polarization and angle, robustness against harshenvironmental conditions, and large area fabrication by scalable methods,are essential elements in (solar) thermophotovoltaics. Compared to the noblemetal and multilayered broadband absorbers, high-temperature refractorymetal-based nanostructures with low-Q resonators are reported less. In thiswork, 3D titanium nitride (TiN) nanopillars are investigated for ultrabroadbandabsorption in the visible and near-infrared spectral regions with averageabsorptivities of 0.94, over a wide range of oblique angles between 0° and75°. The effect of geometrical parameters of the TiN nanopillars on broadbandabsorption is investigated. By combining the flexibility of nanopillardesign and lossy TiN films, ultrabroadband absorption in the visible and nearinfraredis obtained. A thin layer of hafnium oxide is deposited to enhance thethermal stability of TiN nanopillars. Finally, the thermal/spectral stability ofthe TiN nanopillars is demonstrated after annealing at 1473 K for 24 h whileretaining their structural features. Thus, the TiN nanopillars can provideexcellent opportunities for high-temperature applications, especially solarthermophotovoltaics.

KW - 3D nanopillars

KW - broadband absorption

KW - high-temperature photonics

KW - titanium nitride

KW - vertical-gap plasmon resonators

UR - http://onlinelibrary.wiley.com/doi/10.1002/adom.201700552/full

U2 - 10.1002/adom.201700552

DO - 10.1002/adom.201700552

M3 - Journal article

SN - 2195-1071

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JO - Advanced Optical Materials

JF - Advanced Optical Materials

IS - 22

M1 - 1700552

ER -

Large‐Area Ultrabroadband Absorber for Solar Thermophotovoltaics Based on 3D Titanium Nitride Nanopillars

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Keywords

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