Fig. 4From: Spectrum splitting for efficient utilization of solar radiation: a novel photovoltaic–thermoelectric power generation systemAbsorption data of (black dots) the “Metal Velvet™” absorber by Acktar Advanced Coatings (Datasheet: Cold Mirror 2015) and (red circles) the “Tinox® energy Al” by Almecosolar (Website 2015)Back to article page