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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:31 |
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Conference: Bucharest University Faculty of Physics 2016 Meeting
Section: Optics, Spectroscopy, Plasma and Lasers
Title:
Preliminary studies on optical performance of solar control glazings
Authors:
I. PANA(1,2), C. VITELARU(1), A. KISS(1), Mariana BRAIC(1)
Affiliation:
1) National Institute for Optoelectronics, 409 Atomistilor St., Magurele, Ilfov, 077125, Romania
2) Faculty of Physics, University of Bucharest, 405 Atomistilor St., Magurele, Ilfov, 077125, Romania
E-mail
iulian.pana@inoe.ro
Keywords:
low emissivity coatings, silver-based multilayer structures, magnetron sputtering
Abstract:
In the last few years there has been a growing interest in the development of the global glazing industry in order to obtain energy-efficient windows [1]. The main requirements for modern windows are a higher transparency and a reduced heat loss, these being fulfilled by optimizing the solar transmission in the visible spectral range and increasing the reflectivity in the near-infrared spectral range [2].
One classical approach, introduced for the first time in the 80s, is to adjust the thicknesses and optical constants of individual layers within a insulator/metal/insulator (IMI) multilayer structure. Even though the performance of solar control glazings has been improved in recent years, most improvements were made by using different types of transparent oxides in a IMI multilayer structure such as TiO2, AZO, ITO, SnO2, SiO2, VO2, ZnO, etc. In this case, several studies indicated that the optical properties of the metallic layers (M=Al, Cu, Au, Ag) are altered by thermal oxidation and corrosion processes during the exposure to the atmospheric conditions.
Until now, part of the research studies have focused on the possibility of using nitrides layers in IMI structures instead of using oxides as antireflective layers. The aim of this study is to investigate the optical properties of a low emissivity SiNx/Ag/SiNx multilayer structure obtained by magnetron sputtering technique. The optical parameters of the amorphous SiNx (1,11≤x≤1,66) and Ag thin films were evaluated by using spectrophotometric data. Also, a comparative study between the theoretical designs and experimental spectral photometric curves of SiNx/Ag/SiNx with different thicknesses of Ag layer will be presented.
References:
[1] J. Mohelnikova, Nanocoatings for architectural glass, Woodhead Publishing Limited, p.182-202, 2011.
[2] Erdem Cuce, A state-of- the-art review on innovative glazing technologies, Renewable and Sustainable Energy Reviews 41 (2015).
Acknowledgement:
This work was funded by Core Program, under the support of ANCSI, project no. PN 16.40.01.01.
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