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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/031/03/0495-0499

    • Keywords

       

      CdS; CdSSe; nanocrystals; glasses; optical filters.

    • Abstract

       

      The compositions containing 55 and 60% of silica have been formulated for preparation of glass filters having sharp cut-off at 475 and 575 nm. To achieve cut-off at these wavelengths, the glasses have been doped with CdS/CdSSe and melted at 1200–1300°C. The glass samples were transparent and pale yellow in colour due to presence of CdS/CdSSe tiny nano crystal (Q-dots). in situ growth of CdS/CdSSe nano crystals imparts the yellow/orange/red colour to these glasses. Optical study shows that as prepared glasses have optical cut-off in the range 350–370 nm. The linear crystal growth of CdS/CdSSe in glasses exhibits red shift in optical cut-off. The optical filter having cut-off at 475 nm can be prepared by doping CdS and cut-off filter of wavelength 575 nm by CdSSe. The TEM results show that the CdS/CdSSe nano crystals (Q-dots) ranging from 2–5 nm are uniformly distributed into the glass matrix.

    • Author Affiliations

       

      R S Sonawane1 S D Naik1 S K Apte1 M V Kulkarni1 B B Kale1

      1. Department of Information Technology, Centre for Materials for Electronics Technology (C-MET), Panchawati, Pune 411 008, India

© 2017 Indian Academy of Sciences, Bengaluru.