Publication | Open Access
Efficient, Scalable, and High‐Temperature Selective Solar Absorbers Based on Hybrid‐Strategy Plasmonic Metamaterials (Solar RRL 8∕2018)
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2018
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Refractory TantalumEngineeringEnergy ConversionMetamaterialsPlasmon-enhanced PhotovoltaicsSolar Rrl 8∕2018PhotovoltaicsElectromagnetic MetamaterialsDr. HuangSolar Thermal EnergyPlasmonic MaterialMaterials ScienceRadiative AbsorptionPlasmonic MetamaterialsPlasmonicsHybrid‐strategy Plasmonic MetamaterialsApplied PhysicsLight AbsorptionDynamic MetamaterialsSolar Cell Materials
In article no. 1800057, Dr. Huang's group from The Hong Kong University of Science and Technology proposes a highly-efficient selective solar absorber based on plasmonic metamaterials. They adopted triangular high-loss meta-atoms in the plasmonic metamaterials to achieve full-spectrum and near-perfect sunlight absorption. In addition, refractory tantalum (Ta) was firstly introduced into plasmonic absorbers serving as an infrared reflector. As a result, a high solar thermal energy conversion efficiency of 77.3% at 1000 K and 100-sun was attained in the fabricated selective solar absorber. The proposed solar absorber is quite stable even at an extremely high temperature of 1000 K. The potential of the solar absorber to be scaled up for commercial applications is also demonstrated.