Fig. 3: Omnidirectional solar-thermal energy conversion capability of SGM absorber. | Nature Communications

Fig. 3: Omnidirectional solar-thermal energy conversion capability of SGM absorber.

From: Structured graphene metamaterial selective absorbers for high efficiency and omnidirectional solar thermal energy conversion

Fig. 3

ac Angle-dependent absorption spectra of H2 SGM absorber with 30-nm graphene metamaterial film under a TE-polarized, b TM-polarized, and c unpolarized light, respectively. df Averaged absorbance over incident angles from 0° to 20° and 0° to 40° of d TE-polarized, e TM-polarized, and f unpolarized light. g, h The calculated g solar-to-thermal efficiencies and h overall efficiencies of H2 SGM absorber with a 30-nm graphene metamaterial film under TE-polarized, TM-polarized, and unpolarized light at various angles of incidence and the working situation of T0 = 298 K, TA = 1273 K, and C = 1000.

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