Antireflection coatings with FeSi2 layer: Application to spectrally selective infrared emitter
✍ Scribed by Y. Kaneko; M. Suzuki; K. Nakajima; K. Kimura; K. Akiyama; K. Harutsugu; H. Wakabayashi; T. Makino
- Publisher
- Elsevier
- Year
- 2011
- Tongue
- English
- Weight
- 246 KB
- Volume
- 11
- Category
- Article
- ISSN
- 1875-3892
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✦ Synopsis
We have developed efficient spectrally selective infrared (IR) emitters that can be utilized for thermophotovoltaic (TPV) power generation by using stainless steel (SUS304) substrates coated with -FeSi 2 thin films. To develop spectrally selective emitters, we theoretically propose antireflection (AR) coatings consisting of a single layer of a dielectric material having a high refractive index (~5) and are appropriate for use with metals such as stainless steels in the IR region. This type of AR coating is fabricated by sputtering a -FeSi 2 thin film on a polished SUS304 substrate. The reflectance in the IR region is successfully reduced to less than 10%. In addition, the AR properties are stable even at 700 K in air. Therefore, metals with AR coatings of -FeSi 2 can be applied to IR emitters in TPV systems.