Agustín-Sáenz, CeciliaMachado, MaiderTercjak, Agnieszka2019-01-15Agustín-Sáenz , C , Machado , M & Tercjak , A 2019 , ' Antireflective mesoporous silica coatings by optimization of water content in acid-catalyzed sol-gel method for application in glass covers of concentrated photovoltaic modules ' , Journal of Colloid and Interface Science , vol. 534 , pp. 370-380 . https://doi.org/10.1016/j.jcis.2018.09.0430021-9797researchoutputwizard: 11556/626Publisher Copyright: © 2018Porous silica layers with outstanding antireflective properties have been prepared by acid-catalyzed sol-gel process in presence of organic phases as structure directing agents (SDA) and excess water, with the aim of offering a cost-competitive, easy up-scaling and high efficiency process that contributes to reduce current levelized cost of energy (LCOE) of concentrating photovoltaics (CPV). The process has been optimized by controlling the water/alkoxide ratio, which is an important structure-regulating tool, having a strong influence in the structural properties of sol-gel synthesized materials. Hydrolysis of the inorganic precursor has been accomplished in high water/alkoxide conditions and in the presence of SDAs. Evaporation induced self-assembly (EISA) during coating deposition and the scanning of four types of SDAs have permitted to select the coating that fulfilled specific thickness and refractive index values with, in parallel, excellent results on sol stability. The final optimization has produced mesoporous coatings with ∼9 nm mean pore size, leading to an enhancement in transmittance up to 7.4% over bare glass in the 300–1500 nm wavelength range. The transmittance spectra have been used as inputs for the theoretical calculation of the short-circuit current density of a commercially available multijunction solar cell for CPV applications.112027528enginfo:eu-repo/semantics/restrictedAccessjournal article10.1016/j.jcis.2018.09.043AntireflectionSilicaPorous coatingAcid-catalyzedSol-gelAntireflectionSilicaPorous coatingAcid-catalyzedSol-gelElectronic, Optical and Magnetic MaterialsBiomaterialsSurfaces, Coatings and FilmsColloid and Surface ChemistrySDG 7 - Affordable and Clean EnergyFunding InfoThis work was supported by the Basque Government for EMAI-TEK 2017 program as well as theELKARTEK projects FRONTIERS-2(contract number KK2016-00093) and FRONTIERS-3 (contractnumber KK2017-00096). The authors thank ICV-CSIC, Yolanda Cas-tro and Alicia Durán for ellipsometry and EEP measurements. Theauthors thank Miguel Pérez-Aradros for the help with graphicalabstract illustration.This work was supported by the Basque Government for EMAI-TEK 2017 program as well as theELKARTEK projects FRONTIERS-2(contract number KK2016-00093) and FRONTIERS-3 (contractnumber KK2017-00096). The authors thank ICV-CSIC, Yolanda Cas-tro and Alicia Durán for ellipsometry and EEP measurements. Theauthors thank Miguel Pérez-Aradros for the help with graphicalabstract illustration.http://www.scopus.com/inward/record.url?scp=85053797805&partnerID=8YFLogxK