Solar selective performance of metal nitride/oxynitride based magnetron sputtered thin film coatings: a comprehensive review

Abstract

Since solar thermal collectors are considered to be the most direct way of converting the solar energy into the usable form, in the last few years growing attention has been paid to the development of transition metal nitride and metal oxynitride based thin film selective surfaces for solar-thermal collectors in order to harvest more solar energy. A solar-thermal energy system, generally, shows very high solar absorption of incident solar radiation from the solar-thermal collectors in the visible range (0.3 to 2.5 µm) and extremely low thermal losses through emission (or high reflection) in the infrared region (≥ 2.5 µm). The efficiency of a solar-thermal energy conversion system can be improved by the use of solar selective surfaces consisting of novel metallic nanoparticles surrounded in metal nitride/oxynitrides systems. In order to enhance the effectiveness of solar thermal devices, solar selective surfaces with high thermal stability are a prerequisite. Over the years, substantial efforts have been made in the field of solar selective surfaces to attain higher solar absorptance and lower thermal emittance at high temperature (above 400°C) applications. In this article, we review the present state-of-the-art transition metal nitride and/or oxynitrides based vacuum sputtered Page 1 of 36 AUTHOR SUBMITTED MANUSCRIPT-JOPT-104532.R1 nanostructured thin film coatings with respect to their optical and solar selective surface applications. We have also summarized the solar selectivity data from recent published literature investigations, including discussion on some potential applications for these materials.

Annealing effects on microstructural, optical, and mechanical properties of sputtered CrN thin film coatings: Experimental studies and finite element modeling

“…Many studies have been undertaken which examine the structural, morphological, spectral selective, local electronic bonding states, optical, mechanical and tribological properties of CrN-based thin film coatings [31][32][33][34][35][36][37]. However, a comprehensive study investigating the impact of annealing temperatures on structural, morphological, and optical properties and providing a detailed mechanical analysis via experimental procedure and finite element modeling in one paper is still lacking.…”

Extraction, optical properties, and aging studies of natural pigments of various flower plants

“…cristia, Rosa ards rovar, Pereskia bleo, and Alternanthera ficoidea. These defect bands generate an energy tail that extends from both the bottom of the conduction bands and top of the valence bands to the deep of the bandgap [58,59]. This energy correlated defect tail is termed as the Urbach energy provided by Eq.…”

Synthesis and Characterization of Multilayered CrAlN/Al2O3 Tandem Coating Using HiPIMS for Solar Selective Applications at High Temperature

“…Some high-temperature solar absorber coatings that have already been reported are CrAlN/CrAlON/Al 2 O 3 , CrAlN/CrAlON/Si 3 N 4 , Ti/AlTiN/AlTiON/AlTiO, TiN/AlCrSiO/AlCrSiO, AlMoN­(H)/AlMoN­(L), Mo–Si 3 N 4 , Mo/ZrSiN/ZrSiON/SiO 2 , W/Ag/WN-AlN/AlN/SiO 2 , W/AlSi x N/AlSiO y N x /AlSiO x , W/CrAlSiN x /CrAlSiN x O y /SiAlO x , and W/WAlSiN/SiON/SiO 2 . In addition, a table presenting the solar selectivity of metal nitride/oxynitrides SSC coatings deposited by magnetron sputtering on various substrates can be found in ref . In previous works, Escobar-Galindo et al studied the microstructure, element composition, chemical bonding, and optical properties of Al y Ti 1– y (O x N 1– x ) multilayered coatings, both before and after single-stage (12 h) and thermal cycles in air. , The findings revealed that the SSCs remained stable up to 650 °C during the single-stage tests.…”