Wen-Shuai REN, Er-Tao HU, Hua-Tian TU, Lei XU, An-Qing JIANG, Rong HE, Wei WEI, Osamu YOSHIE, Song-You WANG, Hai-Bin ZHAO, Rong-Jun ZHANG, Yu-Xiang ZHENG, Young-Pak LEE, Liang-Yao CHEN. The study of high-efficiency four-layer photon-to-heat conversion film based on Ti-MgF2 cermet[J]. Journal of Infrared and Millimeter Waves, 2021, 40(3): 290
- Journal of Infrared and Millimeter Waves
- Vol. 40, Issue 3, 290 (2021)
Fig. 1. Schematic diagram of the solar selective absorption film with a typical four-layer film structure
Fig. 2. The refractive index n and extinction coefficient k spectra of the simulated material X as the absorption layer
Fig. 3. Maxwell-Garnett's diffuse microstructures（a） real microstructure，（b） ideal situation
Fig. 4. Bruggeman's aggregate microstructures（a） real microstructure，（b） ideal situation
Fig. 5. Absorption spectra of the four-layer structure with the absorption layer consisting of metal-metal alloy and metal-dielectric cermet， respectively
Fig. 6. Measured（symbol） and fitted（line） ellipsometric parameter Ψ and Δ，（a） and（b）， of the composite films at the incident angle of 65°
Fig. 7. The refractive index n and extinction coefficient k，（a） and（b）， of the Ti-MgF2 nanocomposite thin films at different concentrations of Ti
Fig. 8. Absorptance of new four-layer photon-to-heat conversion film compared to that of previous four-layer and six-layer film structures using Ti as the absorption layer
Fig. 9. Measured and simulated absorptance of the new four-layer film structure with high photon-to-heat conversion efficiency
Fig. 10. The SEM image of the new four-layer film structure
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Table 1. Proportion of individual elements in Ti-MgF2 composites prepared under different sputtering power conditions
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