Sol–gel antireflection coatings obtained by the drawing method on large items made from optical glass

The porous SiO2/TiO2bilayer antireflection coatings with self-cleaning capacity have been prepared by a sol-gel dip-coating method, the surfactant template, Pluronic F123 (PF123) was added to the sol as a pore generator. The performances of the coatings were analyzed with ultraviolet visible spectrophotometer (UV-Vis), scanning electron microscope (SEM) and atomic force microscopy (AFM). The self-cleaning function of coatings was evaluated by means of photocatalytic degradation of methyl orange in aqueous solution, and mechanical strength of the coatings has also been studied. The results indicate that the average transmittance of porous SiO2/TiO2coating increases by 6% as compared to uncoated glass, the coating has a small particle size, a porous structure and a low roughness. After illuminated by ultraviolet light for 3 h, the 5 mg/L methyl orange can be degraded by 56.5%. In addition, the coating has an excellent mechanical strength.

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Sol–gel-derived nanocrystalline aluminum-doped zinc oxide thin films for use as antireflection coatings in silicon solar cells

Journal of Materials Research ◽

10.1557/jmr.2013.273 ◽

2013 ◽

Vol 28 (21) ◽

pp. 2990-2995 ◽

Cited By ~ 3

Author(s):

Amita Verma ◽

Narayanasamy Vijayan

Keyword(s):

Thin Films ◽

Zinc Oxide ◽

Solar Cells ◽

Sol Gel ◽

Silicon Solar Cells ◽

Antireflection Coatings ◽

Oxide Thin Films ◽

Aluminum Doped Zinc Oxide ◽

Nanocrystalline Aluminum ◽

Image Position

Abstract

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Graded index Sol-Gel antireflection coatings

2013 IEEE 39th Photovoltaic Specialists Conference (PVSC) ◽

10.1109/pvsc.2013.6744844 ◽

2013 ◽

Author(s):

Max Wang ◽

Jonathan Grandidier ◽

Steven M. Jones ◽

Harry A. Atwater

Keyword(s):

Sol Gel ◽

Antireflection Coatings ◽

Graded Index

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Poly(propylene glycols) as effective additives to the sol-gel process in fabrication of antireflection coatings onto silica glass

Russian Journal of Applied Chemistry ◽

10.1134/s1070427209060111 ◽

2009 ◽

Vol 82 (6) ◽

pp. 991-994 ◽

Cited By ~ 4

Author(s):

B. B. Troitskii ◽

Yu. A. Mamaev ◽

A. A. Babin ◽

V. N. Denisova ◽

M. A. Novikova ◽

...

Keyword(s):

Silica Glass ◽

Sol Gel ◽

Antireflection Coatings ◽

Sol Gel Process ◽

Poly Propylene

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Effects of PEG1000 and Sol Concentration on the Structural and Optical Properties of Sol–Gel ZnO Porous Thin Films

Materials ◽

10.3390/ma11101840 ◽

2018 ◽

Vol 11 (10) ◽

pp. 1840

Author(s):

Dong Xu ◽

Qian Yu ◽

Taiyun Chen ◽

Sujuan Zhong ◽

Jia Ma ◽

...

Keyword(s):

Thin Films ◽

Optical Properties ◽

Formation Mechanism ◽

Pore Formation ◽

Sol Gel ◽

Dip Coating ◽

Antireflection Coatings ◽

Uv Spectrum ◽

Sem Images ◽

Porous Thin Films

ZnO porous thin films were synthesized as antireflection coatings via a sol–gel dip-coating method with polyethylene glycol (PEG1000) utilized as a polymeric porogen on alumina transparent ceramics. The pore formation mechanism of the ZnO porous thin films was proposed through thermal and Fourier transformation infrared spectrometer (FTIR) analyses. The effect of sol concentrations on crystal structure, microstructure, and optical properties was also discussed. The experiment results indicated that all the ZnO thin films exhibited a hexagonal wurtzite structure with their preferred orientation along a (0 0 2) plane by X-ray diffraction (XRD) patterns. The grain size of the films increased from 30.5 to 37.4 nm with the sol concentration ranging from 0.2 to 1.0 M. Furthermore, scanning electron microscopy (SEM) images show that the pores on the surface were observed to first decrease as the sol concentration increased and then to disappear as the sol concentration continued to increase. The UV spectrum presents a maximum transmittance of 93.5% at a wavelength of 600 nm at a concentration of 0.6 M, which will be helpful in the practical applications of ZnO porous film on alumina transparent ceramic substrates. The pore formation mechanism of ZnO porous thin films can be ascribed to ring-like network structures between the PEG1000 and zinc oligomers under the phase separation effect.

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