Structural, morphological, and optical characterizations of Mo, CrN and Mo:CrN sputtered coatings for potential solar selective applications

K. Ibrahim; M.M. Rahman; H. Taha; E. Mohammadpour; Z. Zhou; C-Y Yin; A. Nikoloski; Z-T Jiang

doi:10.1016/j.apsusc.2018.01.267

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Structural, morphological, and optical characterizations of Mo, CrN and Mo:CrN sputtered coatings for potential solar selective applications

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Structural, morphological, and optical characterizations of Mo, CrN and Mo:CrN sputtered coatings for potential solar selective applications

K. Ibrahim, M.M. Rahman, H. Taha, E. Mohammadpour, Z. Zhou, C-Y Yin, A. Nikoloski and Z-T Jiang

Applied Surface Science, Vol.440, pp.1001-1010

2018

DOI: https://doi.org/10.1016/j.apsusc.2018.01.267

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Abstract

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.

Details

Title: Structural, morphological, and optical characterizations of Mo, CrN and Mo:CrN sputtered coatings for potential solar selective applications
Authors/Creators: K. Ibrahim (Author/Creator) - Murdoch University
M.M. Rahman (Author/Creator) - Murdoch University
H. Taha (Author/Creator) - University of Baghdad
E. Mohammadpour (Author/Creator) - Murdoch University
Z. Zhou (Author/Creator) - City University of Hong Kong
C-Y Yin (Author/Creator) - Ngee Ann Polytechnic
A. Nikoloski (Author/Creator) - Murdoch University
Z-T Jiang (Author/Creator) - Murdoch University
Publication Details: Applied Surface Science, Vol.440, pp.1001-1010
Publisher: Elsevier BV
Identifiers: 991005544338707891
Murdoch Affiliation: School of Engineering and Information Technology
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Citation topics: 5 Physics; 5.188 Deposition, Hardening & Coating; 5.188.318 Nitride Coatings
Web Of Science research areas: Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter
ESI research areas: Materials Science