TY - JOUR ID - TI - Spectroscopic Study of Sol-gel Synthesized Silica Xerogel Embedded with Dysprosium Ions AU - Amenah A. Salman, Firas J. Al-Maliki PY - 2022 VL - 18 IS - 4 SP - 21 EP - 25 JO - Iraqi Journal of Applied Physics المجلة العراقية للفيزياء التطبيقية SN - 18132065 23091673 AB - Recently, Dysprosium Dy3+ ions embedded in silica xerogels have been synthesized and investigated as a function of Dy3+ concentrations. The spectroscopic activity of Dy+3 ions in silica matrix has been observed through recording the absorption and luminescence spectra. The UV-Visible-NIR spectra revealed absorption peaks due to Dy3+ active centers. The 4F9/2 emissions have been observed from a minority of isolated Dy3+ ions within the pores structure of silica matrix, and the FTIR result supports the distribution of such ions in these porous. The analysis indicates that at doping levels, most ions reside in clusters and 4F9/2 emission, which is demonstrated by the quenching observed in the corresponding spectra. Some spectroscopic parameters such as emission cross-section σem and oscillator strength fexp have been determined and analyzed.

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