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Carbon Nanotube‐Based Tandem Absorber with Tunable Spectral Selectivity: Transition from Near‐Perfect Blackbody Absorber to Solar Selective Absorber
Author(s) -
Selvakumar N.,
Krupanidhi S. B.,
Barshilia Harish C.
Publication year - 2014
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201305070
Subject(s) - materials science , black body radiation , carbon nanotube , tandem , coating , selective surface , thermal , optoelectronics , thermal stability , optics , nanotechnology , composite material , chemical engineering , physics , engineering , radiation , meteorology
CVD grown CNT thin film with a thickness greater than 10 μm behaves like a near‐perfect blackbody absorber (i.e., α/ε = 0.99/0.99). Whereas, for a thickness ≤ 0.4 µm, the CNT based tandem absorber acts as a spectrally selective coating (i.e., α/ε = 0.95/0.20). These selective coatings exhibit thermal stability up to 650 °C in vacuum, which can be used for solar thermal power generation.