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

ABSTRACT: An ideal solar-thermal absorber requires efficient selective absorption with a tunable bandwidth, excellent thermal conductivity and stability, and a simple structure for effective solar thermal energy conversion. Despite various solar absorbers having been demonstrated, these conditions are challenging to achieve simultaneously using conventional materials and structures. Here, we propose and demonstrate three-dimensional structured graphene metamaterial (SGM) that takes advantages of wavelength selectivity from metallic trench-like structures and broadband dispersionless nature and excellent thermal conductivity from the ultrathin graphene metamaterial film. The SGM absorbers exhibit superior solar selective and omnidirectional absorption, flexible tunability of wavelength selective abso

SUBMITTER: Lin KT 

PROVIDER: S-EPMC7069956 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature