Fig. 3
From: Thin film-based colorful radiative cooler using diffuse reflection for color display
a Reflection/absorption of FS-R-A-MS with/without upper ZnS in 8–13 μm. b Reflection/absorption of FS-R-A-MS at 8–13 μm, which use TiO2/SiO2, Al2O3/SiO2 and TiO2/Al2O3 stack as the color filter. c Optical admittance locus of TiO2/SiO2 stack with the upper ZnS. d Optical admittance locus of Al2O3/SiO2 stack with the upper ZnS. (e) Optical admittance locus of TiO2/Al2O3 stack with the upper ZnS. f Reflection of TiO2/SiO2, Al2O3/SiO2 and TiO2/Al2O3 stack at 400–700 nm