Background: An increasing interest has been recently grown in the development of nearly perfect absorber materials for solar energy collectors and more in general for all the thermophotovoltaic applications. Methods: Wide angle and broadband perfect absorbers with compact multilayer structures made of a sequence of ITO and TiN layers are here studied to develop new devices for solar thermal energy harvesting.
We study wide-angle and broadband perfect absorbers with compact multilayer
structures made of a sequence of ITO and TiN layers deposited onto a silver thick
layer. An optimization procedure is introduced for searching the optimal thicknesses
of the layers so as to design a perfect broadband absorber from 400nm to 750 nm, for a
wide range of angles of incidence from 0◦ to 50◦, for both polarizations and with a low
emissivity in the mid-infrared. We eventually compare the performances of several
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