Mechanical and microstructural properties of broadband anti-reflective TiO<sub>2</sub>/SiO<sub>2</sub> coatings for photovoltaic applications fabricated by magnetron sputtering

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dc.contributor.authorZambrano, D. F.
dc.contributor.authorVillarroel, R.
dc.contributor.authorEspinoza-Gonzalez, R.
dc.contributor.authorCarvajal, N.
dc.contributor.authorRosenkranz, A.
dc.contributor.authorMontano-Figueroa, A. G.
dc.contributor.authorArellano-Jimenez, M. J.
dc.contributor.authorQuevedo-Lopez, M.
dc.contributor.authorValenzuela, P.
dc.contributor.authorGacitua, W.
dc.date.accessioned2025-01-20T23:55:31Z
dc.date.available2025-01-20T23:55:31Z
dc.date.issued2021
dc.description.abstractAnti-reflective coatings are used in photovoltaic systems to minimize reflectance thus optimizing efficiency. Besides excellent optical properties, these coatings need to provide good mechanical properties due to hostile environmental conditions. Therefore, this study aims at designing anti-reflective coatings based upon multi layers of TiO2 and SiO2 by magnetron sputtering on glass and silicon substrates at room temperature. Afterwards, these coatings were thermally annealed at 400, 500 and 600 degrees C to study the influence of such treatment on their optical and mechanical properties. Samples prepared at room temperature and annealed at 400 degrees C showed an optimized reflectance of about 2%. Advanced materials characterization techniques were used to elucidate the microstructural evolution of the multi-layers. The multi-layers annealed at 400 degrees C demonstrated a dense and smoothly packed microstructure with homogenous grains (50 nm in size), with a phase transformation from amorphous to anatase. In addition, exposure and damage of the glass substrate were detected for elevated temperatures (500 and 600 degrees C), thus increasing the reflectance. Nanoindentation revealed an improved hardness, elasticity, and resistance against plastic deformation for the sample annealed at 400 degrees C. Consequently, anti reflective coatings with post-annealing treatment at 400 degrees C, unify two complementary aspects such as improved mechanical properties (extended durability) and enhanced collection abilities over a broader wavelength range (increased efficiency).
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.solmat.2020.110841
dc.identifier.eissn1879-3398
dc.identifier.issn0927-0248
dc.identifier.urihttps://doi.org/10.1016/j.solmat.2020.110841
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95093
dc.identifier.wosidWOS:000596260100003
dc.language.isoen
dc.revistaSolar energy materials and solar cells
dc.rightsacceso restringido
dc.subjectAnti-reflective coatings
dc.subjectMagnetron sputtering
dc.subjectTiO2/SiO2
dc.subjectResistance against plastic deformation
dc.subjectPhotovoltaic solar panels
dc.subject.ods07 Affordable and Clean Energy
dc.subject.odspa07 Energía asequible y no contaminante
dc.titleMechanical and microstructural properties of broadband anti-reflective TiO<sub>2</sub>/SiO<sub>2</sub> coatings for photovoltaic applications fabricated by magnetron sputtering
dc.typeartículo
dc.volumen220
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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