High Entropy Oxide Thin Films as High Temperature Solar Selective Absorber

Abstract

High entropy alloy (HEA) and high entropy oxide (HEO) coatings were deposited using RF reactive magnetron co-sputtering techniques Stainless steel (SS) was used as substrates for solar absorber coatings In this works various deposition parameters including sputtering power O2 flow rate and deposited time were investigated The as-deposited coatings were post annealing at different temperatures in air to investigate its thermal stability The resulting coatings therefore exhibit various compositions crystal structures grain sizes and thicknesses The obtained coatings were examined using field emission scanning electron microscopes (FE-SEM) transmission electron microscopes (TEM) glazing angle X-Ray diffraction (GIXRD) Energy-dispersive X-ray spectroscopy (EDS) UV/vis/NIR spectrometer emissionmeter and ellipsometer Effects of the material characteristics on the coating performance are discussed

Date of Award	2020
Original language	English
Supervisor	Jyh-Ming Ting (Supervisor)