عنوان المقالة: Structural, morphological, and optical characterizations of Mo, CrN and Mo:CrN sputtered coatings for potential solar selective applications
Khalil Ibrahim, M. Mahbubur Rahman, Hatem Taha, Ehsan Mohammadpour, Zhifeng Zhou, Chun-Yang Yin, Aleksandar Nikoloski, Zhong-Tao Jiang
الملخص الانجليزي
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.
تاريخ النشر
31/01/2018
الناشر
Applied Surface Science/ Elsevier
رقم المجلد
رقم العدد
440
ISSN/ISBN
0169-4332
رابط DOI
https://doi.org/10.1016/j.apsusc.2018.01.267
الصفحات
1001-1010
الكلمات المفتاحية
Magnetron sputtering Metal nitride Coatings Solar absorptance Thermal emittance Solar selective surface
حاتم عبدالرزاق طه | Hatem Taha | 3217