• Influence of Bi$_2$O$_3$, Sb$_2$O$_3$ and Y$_2$O$_3$ on optical properties of Er$_2$O$_3$-doped CaO–P$_2$O$_5$–B$_2$O$_3$ glasses

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      https://www.ias.ac.in/article/fulltext/boms/043/0071

    • Keywords

       

      Thermoluminescence; trap depth parameters; optical absorption; photoluminescence; J–O parameters.

    • Abstract

       

      The glasses of the composition 25CaO–10(M$_2$O$_3$)–14P$_2$O$_5$–50B$_2$O$_3$:1Er$_2$O$_3$ (where M$=$Bi/Sb/Y) are prepared. The prepared samples are characterized by XRD, thermoluminescence (TL),UVand photoluminescence (PL) techniques. TL reports suggest that the sample of 10 mol%Y2O3 concentration (EY) exhibiting good shape symmetry factor ($u = 0.484$) and low AEs ($E_{\tau} = 1.189$, $E_{\delta} = 1.218$ and $E_{\omega} = 1.210$) under $\gamma$-irradiation might be a good TL asset. The optical absorptions of present glasses are studied well through the Judd–Ofelt theory.The evaluations such as Judd–Ofelt parameters are additionallyprojected. They are found to be the best ($\Omega_2 = 1.62 \times 10^{−21}$ cm$^2$, $\Omega_4 = 1.56 \times 10^{−21}$ cm$^2$ and $\Omega_6 = 0.59 \times 10^{−21}$ cm$^2$) for the sample of 10 mol% Y$_2$O$_3$ concentration (E$_{\rm Y}$), which may be a good optical asset to develop a novel class of laser resources. The radiative evolutions corresponding to the emissive transition ${}^4$S$_{3/2}$ $\to$ ${}^4$I$_{15/2}$ are assessed by PL technique. The evaluations are found to be the best ($A_t = 7089$ s$^{−1}$, $\tau_{\rm rad} = 140$ $\mu$s and $\beta = 96.1$%) for the sample of 10 mol% Y$_2$O$_3$concentration (E$_{\rm Y}$), which may be a useful luminescent resource.

    • Author Affiliations

       

      G RAVI KUMAR1 CH SRINIVASA RAO2

      1. Department of Physics, Sreenidhi Institute of Science and Technology, JNTUH, Hyderabad 501 301, India
      2. Department of Physics, Andhra Loyola College, Krishna University, Vijayawada 520008, India
    • Dates

       
  • Bulletin of Materials Science | News

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