Resumen
Solar energy is the most important clean energy source on the earth, and many research studies have been conducted to investigate solar-energy collection. This article numerically proposes a new ultra-broadband solar absorber with structures of multilayer planar films for solar thermal energy conversion. The high absorption rate of designed multilayer planar films mainly results from the multiple asymmetric highly lossy Fabry?Perot resonators by the laminated structures of the intrinsic SiO2 dielectric absorption in the wide wavelength range by the refractory of different non-noble metals. The proposed absorber of multilayer planar films could have broad application prospects in hot-electron devices and solar-energy harvesting.