Reflection Enhancement Using TiO2/SiO2 Bilayer Films Prepared by Cost-Effective Sol-gel Method

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R. Ajay Kumar, R. S. Dubey, V. Ganesan (2017). Reflection Enhancement Using TiO2/SiO2 Bilayer Films Prepared by Cost-Effective Sol-gel Method. Mechanics, Materials Science & Engineering, Vol 10. doi:10.2412/mmse.84.67.762

Authors: R. Ajay Kumar, R. S. Dubey , V. Ganesan

ABSTRACT. Multilayer dielectric thin film structure has been demanded for its application in optoelectronic devices such as optical waveguides, vertical cavity surface-emitting devices, biosensors etc. In this paper, we present the fabrication and characterization of bilayer thin films of TiO2/SiO2 using sol-gel spin coating method. Ellipsometer measurement showed refractive index values 1.46, 2.1 corresponding to the SiO2 and TiO2 films respectively. The FTIR transmittance peaks observed at ~970 cm-1, ~1100 cm-1 and ~1400 cm-1 are attributed to the Ti-O-Si, Si-O-Si and Ti-O-Ti bonds respectively. Maximum reflectance is observed from two bilayer film structure which can be further optimized to get the high reflection to a broad wavelength range.

Keywords: TiO2, SiO2, TiO2/ SiO2, thin films, sol-gel spin coating method, refractive index, reflection

DOI 10.2412/mmse.84.67.762

View in web format Reflection Enhancement Using TiO2/SiO2 Bilayer Films Prepared by Cost-Effective Sol-gel Method

References

[1] S. J. Bull and A. M. Jones (1996), Multilayer coatings for improved performance, Surf. Coat. Technol., 78, DOI: 10.1016/0257-8972(94)02407-3.

[2] M. Nocuń, S. Kwaśny, J. Zontek (2011), Optical properties of SiO2/TiO2 thin layers prepared by sol–gel methodOptica Applicata, Vol. XLI, No. 4.

[3] K. Han, J. H.  Kim, (2011), Reflectance modulation of transparent multilayer thin films for energy efficient window applications, Material letters Vol. 65, 2466-2469, DOI:10.1016/j.matlet.2011.05.006

[4] X. Wang, G. Wu, B. Zhou and J. Shen, Thermal Annealing Effect on Optical Properties of Binary TiO2-SiO2 Sol-Gel Coatings, Materials 2013, 6(1), 76-84; DOI:10.3390/ma6010076

[5] C. Huang, H. Bai, Y. Huang, S. Liu, S. Yen and Y. Tseng International Journal of Photoenergy, Volume 2012 (2012), Article ID 620764, DOI: 10.1155/2012/620764

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