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      https://www.ias.ac.in/article/fulltext/boms/044/0077

    • Keywords

       

      Spin coating; white light emission; solid-state ceramic route; photoluminescence.

    • Abstract

       

      This study investigates the preparation and characterization of CaZr$_{0.9}$Sm$_{0.025}$Dy$_{0.075}$O$_3$-coated film system. The powder used for coating was prepared by solid-state ceramic route synthesis and spin coating technique was used to prepare the film of the CaZr$_{0.9}$Sm$_{0.025}$Dy$_{0.075}$O$_3$ system. Structural studies were carried out using X-ray diffraction (XRD) and Fourier transform infrared spectroscopy. The XRD peaks of spin-coated system were indexed for an orthorhombic (Pnma) perovskite structure of CaZrO$_3$. The film when excited at 350 nm yield blue-green emission at 482 and 571 nm,which corresponds to the transition from ${}^4$F$_{9/2}$ to ${}^6$H$_{15/2}$ and ${}^6$H$_{13/2}$ levels of Dy$^{3+}$ ion, respectively, and orange-red emission at 603 and 657 nm corresponds to the transition from ${}^4$G$_{5/2}$ to ${}^6$H$_{7/2}$ and ${}^6$H$_{11/2}$ transitions of Sm$^{3+}$ ions,respectively. CIE coordinates of the film show near-white light emission from the system.

    • Author Affiliations

       

      MEENU VENUGOPAL1 H PADMA KUMAR2 R JAYAKRISHNAN3

      1. Department of Physics, Mar Ivanios College, Bethany Hills, Trivandrum 695015, India
      2. Department of Physics, V.T.M.N.S.S College, Dhanuvachapuram 695503, India
      3. Department of Physics, Christian College, Chengannur 689121, India
    • Dates

       
  • Bulletin of Materials Science | News

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      Posted on July 25, 2019

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