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      https://www.ias.ac.in/article/fulltext/boms/025/01/0069-0074

    • Keywords

       

      Sol–gel glasses; optical properties; optical materials.

    • Abstract

       

      The Cu2+ ion doped silica gel matrices in monolithic shape were prepared by hydrolysis and condensation of tetraethyl orthosilicate (TEOS). The absorption, transmittance and fluorescence spectra of the gel matrices heat treated at different temperatures were monitored. The loss of water and hydroxyl group from silica network changes the optical properties of the Cu2+ ions in the host, noted by the change in colour of monolith and spectral characteristics. The pronounced blue shift observed (700–900 nm to 600–850 nm) for the broad band of the absorption spectra of the samples heated up to 700°C is attributed to the ligand field splitting and partial removal of hydroxyl group from the silica matrices. The results indicate broadband filtering effects of the samples in the wavelength region 400–600 nm. Absorption and fluorescence spectra of the glass matrices heated to 1000°C confirms the conversion of Cu2+ ion to Cu+ ion.

    • Author Affiliations

       

      P I Paulose1 Gin Jose1 Vinoy Thomas1 Gijo Jose1 N V Unnikrishnan1 M K R Warrier2

      1. School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam 686 560, India
      2. Research Centre, Maharajas College, Ernakulam 682 011, India
    • Dates

       
  • Bulletin of Materials Science | News

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