SOL-GEL AR Films for Solar Applications

1986 ◽  
Vol 73 ◽  
Author(s):  
Carol S. Ashley ◽  
Scott T. Reed
Keyword(s):  
Optical Properties ◽  
Flat Plate ◽  
Sol Gel ◽  
Single Layer ◽  
Parabolic Trough ◽  
Photovoltaic Applications ◽  
Quarter Wave ◽  
Fresnel Lenses ◽  
Antireflective Films ◽  
Solar Applications

ABSTRACTSol-gel derived antireflective films have been prepared for a variety of solar applications. The optical properties of the films are optimized by microstructure tailoring in solution by aging and/or in the film by heating and etching. The resulting film provides a quarter-wave, single layer interference surface with a reflectance minimum of <1% at 600 nm. We have applied sol-gel derived AR films to glass and plastics for solar thermal and photovoltaic applications, e.g., parabolic trough collector envelopes, plastic Fresnel lenses, and glazing materials for flat plate collectors.

Optical properties of silica antireflective films formed in sol-gel processes

2011 ◽  
Vol 8 (9) ◽  
pp. 2645-2648 ◽  
Author(s):  
Janusz Jaglarz ◽  
Pawel Karasinski ◽  
Edyta Skoczek
Keyword(s):  
Optical Properties ◽  
Sol Gel ◽  
Antireflective Films

High performance hierarchical nanoporous antireflective films by a facile sol–gel process

RSC Advances ◽  
2016 ◽  
Vol 6 (115) ◽  
pp. 113911-113918 ◽  
Author(s):  
Yao Xiao ◽  
Ronghua Ma ◽  
Changjian Wang ◽  
Xinkai Chen ◽  
Xvsheng Qiao ◽  
...  
Keyword(s):  
High Performance ◽  
Sol Gel ◽  
Single Layer ◽  
Hollow Silica ◽  
Glass Substrates ◽  
Sol Gel Process ◽  
Antireflective Films ◽  
Sol Gel Films

Single layer antireflection (SLAR) sol–gel films on super white glass substrates were prepared by hierarchically introducing hollow silica nano-spheres (HSNs) and F127 templated nano-pores.

Effect of Additives on the Durability and Properties of Antireflective Films for Solar Glass Covers

2007 ◽  
Vol 130 (1) ◽  
Author(s):  
Gema San Vicente ◽  
Rocío Bayón ◽  
Angel Morales
Keyword(s):  
Sol Gel ◽  
Single Layer ◽  
Precursor Solution ◽  
Accelerated Weathering ◽  
Silica Films ◽  
A Value ◽  
Effect Of Additives ◽  
Antireflective Films ◽  
Low Refractive Index

Generally, single layer antireflective (AR) coatings are based on SiO2 for which the low refractive index is achieved by increasing the porosity of the films. On the other hand, the increase of porosity on any material results in a decrease of its mechanical properties. In addition to increasing the solar transmittance, it is equally important that the AR film is long-term stable for its application in solar collectors. In this sense, the objective of our work has been to develop a film that exhibits good AR properties and physical durability as well. In the present study, sol-gel silica films have been deposited on borosilicate glass. The effect of adding some organic compounds to the precursor solution in the properties of the films has been studied. Moreover, accelerated weathering tests have been performed in order to investigate the outdoor durability. A value of solar transmittance as high as 0.974 has been obtained by using a porosity promoter additive. However, the durability tests have shown the necessity of incorporating a hydrophobic additive to the precursor solutions in order to avoid the degradation of the optical properties of the films. 1.5% decrease in solar transmittance is observed after 1900h in the weathering chamber for films prepared with methyltriethoxysilane.

STRUCTURAL, OPTICAL PROPERTIES AND PHOTOCATALYTIC ACTIVITY OF NANOCRYSTALLINE TiO2 THIN FILMS DEPOSITED BY SOL-GEL SPIN COATING

2019 ◽  
Vol 7 (1) ◽  
pp. 28
Author(s):  
KOMARAIAH DURGAM ◽  
RADHA EPPA ◽  
REDDY M. V. RAMANA ◽  
KUMAR J. SIVA ◽  
R. SAYANNA ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Photocatalytic Activity ◽  
Spin Coating ◽  
Sol Gel ◽  
Tio2 Thin Films ◽  
Nanocrystalline Tio2

Ab initio calculation on the Optical Properties of AA- Stacked two dimensional Graphene, Silicene, Germanene, and Stanene

2018 ◽  
Vol 1 (1) ◽  
pp. 46-50
Author(s):  
Rita John ◽  
Benita Merlin
Keyword(s):  
Optical Properties ◽  
Band Structure ◽  
Density Functional ◽  
Electronic Band Structure ◽  
Complex Refractive Index ◽  
Single Layer ◽  
Generalized Gradient ◽  
Electronic Band ◽  
Wide Range ◽  
Optical Region

In this study, we have analyzed the electronic band structure and optical properties of AA-stacked bilayer graphene and its 2D analogues and compared the results with single layers. The calculations have been done using Density Functional Theory with Generalized Gradient Approximation as exchange correlation potential as in CASTEP. The study on electronic band structure shows the splitting of valence and conduction bands. A band gap of 0.342eV in graphene and an infinitesimally small gap in other 2D materials are generated. Similar to a single layer, AA-stacked bilayer materials also exhibit excellent optical properties throughout the optical region from infrared to ultraviolet. Optical properties are studied along both parallel (||) and perpendicular ( ) polarization directions. The complex dielectric function (ε) and the complex refractive index (N) are calculated. The calculated values of ε and N enable us to analyze optical absorption, reflectivity, conductivity, and the electron loss function. Inferences from the study of optical properties are presented. In general the optical properties are found to be enhanced compared to its corresponding single layer. The further study brings out greater inferences towards their direct application in the optical industry through a wide range of the optical spectrum.

Preparation and Optical Properties of CuAlO2 Microcrys-tallites by Complexing Sol-Gel

2011 ◽  
Vol 26 (3) ◽  
pp. 275-280
Author(s):  
Kang LI ◽  
Jian-Feng HUANG ◽  
Li-Yun CAO ◽  
Bo WANG ◽  
Zhe-Yong SHI
Keyword(s):  
Optical Properties ◽  
Sol Gel

Sol-Gel Synthesis, Structure and Optical Properties of Nickel-Manganese Ferrites

2019 ◽  
Vol 11 (3) ◽  
pp. 03021-1-03021-5
Author(s):  
V. S. Bushkova ◽  
◽  
I. P. Yaremiy ◽  
B. K. Ostafiychuk ◽  
N. I. Riznychuk ◽  
...  
Keyword(s):  
Optical Properties ◽  
Sol Gel ◽  
Sol Gel Synthesis ◽  
Nickel Manganese

Sol-gel growth of Ni doped CdS on glass substrates: effect of spin coating speed and dopant concentration

2020 ◽  
Vol 10 ◽  
Author(s):  
Atefeh Nazari Setayesh ◽  
Hassan Sedghi
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Spin Coating ◽  
Optical Band Gap ◽  
Dopant Concentration ◽  
Rotation Speed ◽  
Sol Gel ◽  
Band Gap Energy ◽  
Gap Energy ◽  
Glass Substrates

Background: In this work, CdS thin films were synthesized by sol-gel method (spin coating technique) on glass substrates to investigate the optical behavior of the film. Methods: Different substrate spin coating speeds of 2400, 3000, 3600 rpm and different Ni dopant concentrations of 0 wt.%, 2.5 wt.%, 5 wt.%) were investigated. The optical properties of thin films such as refraction index, extinction coefficient, dielectric constant and optical band gap energy of the layers were discussed using spectroscopic ellipsometry method in the wavelength range of 300 to 900 nm. Results: It can be deduced that substrate rotation speed and dopant concentration has influenced the optical properties of thin films. By decreasing rotation speed of the substrate which results in films with more thicknesses, more optical interferences were appeared in the results. Conclusion: The samples doped with Ni comparing to pure ones have had more optical band gap energy.

Electronic structure and optical properties of spinel structure Zn1-xNixAl2O4 nanopowders synthesized by sol-gel method

2021 ◽  
pp. 138582
Author(s):  
Qiang Lu ◽  
Zhiqiang Wei ◽  
Xiaojuan Wu ◽  
Shangpan Huang ◽  
Meijie Ding ◽  
...  
Keyword(s):  
Optical Properties ◽  
Electronic Structure ◽  
Spinel Structure ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method
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