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Title: Superlattice photonic crystal as broadband solar absorber for high temperature operation

Journal Article · · Optics Express
DOI:https://doi.org/10.1364/OE.22.0A1895· OSTI ID:1459195
 [1];  [2];  [2];  [2];  [1];  [2]
  1. Johannes Kepler Univ. Linz, Linz (Austria)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Here, a high performance solar absorber using a 2D tantalum superlattice photonic crystal (PhC) is proposed and its design is optimized for high-temperature energy conversion. In contrast to the simple lattice PhC, which is limited by diffraction in the short wavelength range, the superlattice PhC achieves solar absorption over broadband spectral range due to the contribution from two superposed lattices with different cavity radii. The superlattice PhC geometry is tailored to achieve maximum thermal transfer efficiency for a low concentration system of 250 suns at 1500 K reaching 85.0% solar absorptivity. In the high concentration case of 1000 suns, the superlattice PhC absorber achieves a solar absorptivity of 96.2% and a thermal transfer efficiency of 82.9% at 1500 K, amounting to an improvement of 10% and 5%, respectively, versus the simple square lattice PhC absorber. In addition, the performance of the superlattice PhC absorber is studied in a solar thermophotovoltaic system which is optimized to minimize absorber re-emission by reducing the absorber-to-emitter area ratio and using a highly reflective silver aperture.

Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0001299
OSTI ID:
1459195
Journal Information:
Optics Express, Vol. 22, Issue S7; ISSN 1094-4087
Publisher:
Optical Society of America (OSA)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 34 works
Citation information provided by
Web of Science

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Cited By (9)

Electronic transport in a two-dimensional superlattice engineered via self-assembled nanostructures journal September 2018
High light extraction efficiency into glass substrate in organic light-emitting diodes by patterning the cathode in graded superlattice with dual periodicity and dual basis journal June 2017
Holographic fabrication of graded photonic super-crystals using an integrated spatial light modulator and reflective optical element laser projection system journal January 2017
Simultaneous direct holographic fabrication of photonic cavity and graded photonic lattice with dual periodicity, dual basis, and dual symmetry journal January 2017
Theoretical Approach to Simulate Efficient Selective Solar Absorbers With Micro or Nano Structured Arrays journal March 2018
Extraordinary Light-Trapping Enhancement in Silicon Solar Cell Patterned with Graded Photonic Super-Crystals journal December 2017
Holographic Fabrication and Optical Property of Graded Photonic Super-Crystals with a Rectangular Unit Super-Cell journal October 2018
Effects of Photonic Band Structure and Unit Super-Cell Size in Graded Photonic Super-Crystal on Broadband Light Absorption in Silicon journal May 2019
Electronic transport in a two-dimensional superlattice engineered via self-assembled nanostructures preprint January 2017

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