![Sample our Physical Sciences journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/110819/TOC-Subject-Sample-2021-Physical-Sciences.jpg"})
Abstract
The solar selective absorber layer is the key part in the heat energy collector. In this study, optical properties of SiO2/Ti/SiO2 multilayer films with the different thickness individually are studied to meet the better optical requirement of a solar selective absorber layer. The variation of the optical reflctance due to the different thickness of individual layer is calculated. Based on the simulation results, a optimized thickness of multilayer, SiO2/Ti/SiO2/Si with the layer thickness of 90/7/110 nm, is obtained, the layer is then fabricated by sputtering deposition and its reflectance is measured for comparison with the result of calculation. The SiO2/Ti/SiO2 multilayer film could be used as a solar selective absorber layer, which is non-Cr-based film and with the good photothermal conversion efficiency of more than 95%. SiO2/Ti/SiO2 multilayer film with the layer thickness of 90/7/110 nm could be a new candidate material for the solar selective absorber layer.
Acknowledgement
This research is supported partly by the National Science Council in Taiwan under Contract No. NSC 100-2622-E-327 -003 -CC3 and partly by the Bureau of Energy, ministry of Economic Affairs in Taiwan under contract No. NSC 98-ET-E-327 -002 -ET.