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Lookup NU author(s): Dr Chun Yang Yin
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).
© 2018 Mo, CrN, and Mo:CrN sputtered coatings synthesized onto silicon Si(100) substrates were investigated as solar selective surfaces and their potential applications in optical devices. These coatings were characterized using XRD, SEM, UV-vis, and FTIR techniques. XRD investigation, showed a change in CrN thin film crystallite characteristic due to Mo doping. Compared to the CrN coating, the Mo:CrN film has a higher lattice parameter and lower grain size of 4.19 nm and 106.18 nm, respectively. FESEM morphology confirmed the decrement in Mo:CrN crystal size due to Mo doping. Optical analysis showed that in the visible range of the solar spectrum, the CrN coatings exhibit the highest solar absorptance of 66% while the lowest thermal emittance value of 5.67 was recorded for the CrN coating doped with Mo. Consequently, the highest solar selectivity of 9.6, and the energy band-gap of 2.88 eV were achieved with the Mo-doped CrN coatings. Various optical coefficients such as optical absorption coefficient, refractive index, extinction coefficient, real and imaginary parts of dielectric constants, and energy loss functions of these coatings were also estimated from the optical reflectance data recorded in the wavelength range of 190–2300 nm.
Author(s): Ibrahim K, Mahbubur Rahman M, Taha H, Mohammadpour E, Zhou Z, Yin C-Y, Nikoloski A, Jiang Z-T
Publication type: Article
Publication status: Published
Journal: Applied Surface Science
Year: 2018
Volume: 440
Pages: 1001-1010
Print publication date: 15/05/2018
Online publication date: 31/01/2018
Acceptance date: 29/01/2018
Date deposited: 21/02/2018
ISSN (print): 0169-4332
ISSN (electronic): 1873-5584
Publisher: Elsevier BV * North-Holland
URL: https://doi.org/10.1016/j.apsusc.2018.01.267
DOI: 10.1016/j.apsusc.2018.01.267
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