Enabling ideal selective solar absorption with 2D metallic dielectric photonic crystals

Adv Mater. 2014 Dec 17;26(47):8041-5. doi: 10.1002/adma.201403302. Epub 2014 Sep 16.


A metallic dielectric photonic crystal with solar broadband, omni-directional, and tunable selective absorption with high temperature stable (1000 °C, 24 hrs) properties is fabricated on a 6" silicon wafer. The broadband absorption is due to a high density of optical cavity modes overlapped with an anti-reflection coating. Results allow for large-scale, low cost, and efficient solar-thermal energy conversion.

Keywords: absorber; cavity modes; photonic crystal; solar; thermophotovoltaic.