Low Solar Absorptance, High Emittance Performance Thermochromic VO₂-Based Smart Radiator Device.

ABSTRACT: Thermochromic vanadium dioxide (VO₂)-based smart radiator devices (SRDs) display emittance variation with changes in temperature, making them very promising for energy-efficient thermal control of spacecrafts in general, and nanosatellites in particular. However, the high solar absorptance of the VO₂-based SRDs remains too high for their intended application. Based on an approach combining optical simulation and experimental work, I demonstrate that an additional top stack layer alternating between high and low refractive indices made of a-Si(25 nm)/SiO₂(67 nm) reduces the solar absorptance of a VO₂-based SRD by 35% (from 0.43 to 0.28) while keeping the emittance performance of the SRD within the requirements for the intended application (low-tem

SUBMITTER: Hendaoui A 

PROVIDER: S-EPMC9783994 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature