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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/039/03/0683-0689

    • Keywords

       

      Anti-reflection; thin film; thickness; refractive index; interference; optical impedance.

    • Abstract

       

      To date, there is no ideal anti-reflection (AR) coating available on solar glass which can effectively transmit the incident light within the visible wavelength range. However, there is a need to develop multifunctional coatingwith superior anti-reflection properties and self-cleaning ability meant to be used for solar glass panels. In spite of self-cleaning ability of materials like TiO2 and ZnO, these coatings on glass substrate have tendency to reduce lighttransmission due to their high refractive indices than glass. Thus, to infuse the anti-reflective property, a low refractive index, SiO$_2$ layer needs to be used in conjunction with TiO$_2$ and ZnO layers. In such case, the optimization ofindividual layer thickness is crucial to achieve maximum transmittance of the visible light. In the present study, we propose an omni-directional anti-reflection coating design for the visible spectral wavelength range of 400–700 nm,where the maximum intensity of light is converted into electrical energy. Herein, we employ the quarter wavelength criteria using SiO$_2$, TiO$_2$ and ZnO to design the coating composed of single, double and triple layers. The thicknessof individual layers was optimized for maximum light transmittance using essential Mcleod simulation software to produce destructive interference between reflected waves and constructive interference between transmitted waves.

    • Author Affiliations

       

      B GEETHA PRIYADARSHINI1 A K SHARMA2

      1. Nanotech Research Innovation & Incubation Centre, PSG Institute of Advanced Studies, Peelamedu, Coimbatore 641004, India
      2. National Centre for Photovoltaic Research & Education, Department of Electrical Engineering, Indian Institute of Technology, Bombay 400 076, India
    • Dates

       

© 2017-2019 Indian Academy of Sciences, Bengaluru.