Durability of microporous hybrid silica coatings: Optical and wetting properties

Ábrahám, Attila; Kócs, Lenke; Albert, Emőke; Tegze, Borbála; Szolnoki, Beáta; Nagy, Norbert; Sáfrán, György; Basa, P.; Hórvölgyi, Zoltán

doi:10.1016/j.tsf.2020.137914

Cited by 7 publications

(4 citation statements)

References 35 publications

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“…When the withdrawal speed was 1 mm s −1 , the maximum transparency (92.16%) was obtained, which was higher than that of bare glass (91.91%) [2]. This result can be attributed to a decrease in the transparency of the coated glass owing to increased coating thickness at higher withdrawal speeds [16]. The thicknesses of the TiO 2 -KH55-PEG coatings at different withdrawal speeds are listed in table 2.…”

Section: Effect Of Withdrawal Speed On Transparency Of Coated Glassmentioning

confidence: 94%

Transparent superhydrophilic metal oxide coating with mechanical and chemical robustness for photocatalytic self-cleaning applications

Hossain,

Lee,

Kim

2023

Phys. Scr.

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A photoactive TiO2-KH550 (3-aminopropyltriethoxysilane) - PEG (Polyethelyneglycol) coating film with excellent superhydrophilicity is deposited on a glass substrate by means of the dip coating method for self-cleaning applications. The effects of the number of coating layers, molecular weight of PEG (200–8000), surface roughness, and film thickness on the hydrophilicity of the film coated on the glass substrate are analyzed. In addition, the mechanical durability, and thermal and chemical stability of the coated film are studied. The tribological properties (friction coefficient and wear track) of the film coated on the glass substrate are investigated. The photo-catalyzed self-cleaning properties of the film are also evaluated. In addition, the effect of withdrawal speed on the optical properties (transmittance) of the film are investigated by obtaining and analyzing its UV spectra. The results indicated that the hydrophilicity of the TiO2 coating film decreased as its surface roughness and thickness increased. The TiO2-KH550-PEG coating fabricated using PEG with a low molecular weight of 400 exhibited a smooth and uniform morphology. The composite TiO2 coating film prepared herein exhibited excellent mechanical durability in a sandpaper abrasion test and retained its superhydrophilicity under harsh chemical conditions (strong acidic and basic media). The coated glass substrate presented superior wear resistance compared to that of the uncoated glass substrate. Moreover, the transparent TiO2 composite film coating exhibited excellent photocatalytic self-cleaning properties. Therefore, it is expected that the TiO2 composite film coated on glass has good potential for use in applications such as window glasses, architectural buildings, and photovoltaic modules.

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Section: Effect Of Withdrawal Speed On Transparency Of Coated Glassmentioning

confidence: 94%

Transparent superhydrophilic metal oxide coating with mechanical and chemical robustness for photocatalytic self-cleaning applications

Hossain,

Lee,

Kim

2023

Phys. Scr.

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“…17 Attila Abraham et al prepared TEOS/MTES-based durable microporous transparent coating with CTAB surfactant. 18 High transmittance of 99.8% was obtained at 632 nm wavelength with a refractive index of 1.25. Xuan Wang et al made an effort to prepare a durable superhydrophilic AR film and also checked the reliability of the prepared film for PV solar glass application.…”

Section: Introductionmentioning

confidence: 93%

“…Similarly, Yixuan Su and his team developed TEOS‐based multifunctional coating with an additional property of UV resistance 17 . Attila Abraham et al prepared TEOS/MTES‐based durable microporous transparent coating with CTAB surfactant 18 . High transmittance of 99.8% was obtained at 632 nm wavelength with a refractive index of 1.25.…”

Section: Introductionmentioning

confidence: 99%

Photon management by scratch‐resistant antireflection coating for the efficiency enhancement of silicon solar cell

Swathi

Shanthi

Aishwarya³

et al. 2022

Intl J of Energy Research

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Antireflection coating (ARC) plays a crucial role in many solar and optical applications. ARC with mechanical robustness was developed to achieve more efficiency for the photovoltaic system cover glasses, by depositing porous Vinyltriethoxysilane/Pluronic F-127-based coating via spin coating technique.The coating shows maximum transparency around 93% in the visible region (400-800 nm). The mechanical robustness of the coating was analyzed using a pencil scratch test as per the ASTM standard D 3363-05 and it showed good stability against a 9H hardness pencil. The porous coating exhibited an enhanced conversion efficiency of 10.56% as compared to the bare glass of efficiency 9.71%; which validate the light-trapping ability of the coating in the visible region. Also, the coating sustains the efficiency of the solar cell even during dust exposure due to its good self-cleaning ability with water contact angle of 112 . It is also noteworthy that the prepared ARC shows UV stability under the UV-B lamp for 72 hours. The ARC developed in this study opens a promising approach to harvest renewable solar energy for photovoltaic systems.

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“…Still, we need a thorough analysis of the influence of these parameters such as soiling, cleaning, temperature, climatic conditions on power generation of PV cells, or in terms of performance degradation of ARCs. Abraham et al investigated the durability and the deterioration of the surface and optical properties for fabricated bifunctional hybrid silica sol-gel coatings by performing an aqueous soaking test at various pH levels [394]. This study also suggests the retrieval of optical properties via heat treatment either entirely or partially.…”

Section: Effect Of Ageing and Environmental Exposure In Arcs And Pv D...mentioning

confidence: 99%

Anti-Reflective Coating Materials: A Holistic Review from PV Perspective

Natarajan

Pugazhendhi

Elavarasan³

et al. 2020

Energies

134

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The solar photovoltaic (PV) cell is a prominent energy harvesting device that reduces the strain in the conventional energy generation approach and endorses the prospectiveness of renewable energy. Thus, the exploration in this ever-green field is worth the effort. From the power conversion efficiency standpoint of view, PVs are consistently improving, and when analyzing the potential areas that can be advanced, more and more exciting challenges are encountered. One such crucial challenge is to increase the photon availability for PV conversion. This challenge is solved using two ways. First, by suppressing the reflection at the interface of the solar cell, and the other way is to enhance the optical pathlength inside the cell for adequate absorption of the photons. Our review addresses this challenge by emphasizing the various strategies that aid in trapping the light in the solar cells. These strategies include the usage of antireflection coatings (ARCs) and light-trapping structures. The primary focus of this study is to review the ARCs from a PV application perspective based on various materials, and it highlights the development of ARCs from more than the past three decades covering the structure, fabrication techniques, optical performance, features, and research potential of ARCs reported. More importantly, various ARCs researched with different classes of PV cells, and their impact on its efficiency is given a special attention. To enhance the optical pathlength, and thus the absorption in solar PV devices, an insight about the advanced light-trapping techniques that deals with the concept of plasmonics, spectral modification, and other prevailing innovative light-trapping structures approaching the Yablonovitch limit is discussed. An extensive collection of information is presented as tables under each core review section. Further, we take a step forward to brief the effects of ageing on ARCs and their influence on the device performance. Finally, we summarize the review of ARCs on the basis of structures, materials, optical performance, multifunctionality, stability, and cost-effectiveness along with a master table comparing the selected high-performance ARCs with perfect AR coatings. Also, from the discussed significant challenges faced by ARCs and future outlook; this work directs the researchers to identify the area of expertise where further research analysis is needed in near future.

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Durability of microporous hybrid silica coatings: Optical and wetting properties

Cited by 7 publications

References 35 publications

Transparent superhydrophilic metal oxide coating with mechanical and chemical robustness for photocatalytic self-cleaning applications

Transparent superhydrophilic metal oxide coating with mechanical and chemical robustness for photocatalytic self-cleaning applications

Photon management by scratch‐resistant antireflection coating for the efficiency enhancement of silicon solar cell

Anti-Reflective Coating Materials: A Holistic Review from PV Perspective

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