IMPACT OF ANNEALING TIME ON THE PROPERTIES OF SM2O3-DOPED BOROTELLURITE GLASSES FOR PHOTONIC APPLICATIONS
DOI:
https://doi.org/10.55766/sujst-2024-06-e05928Keywords:
Annealing times, Borotellurite, Luminescence, Sm3+ ionAbstract
This study presents the effects of annealing time on the physical, structural, optical, and luminescence properties of Sm3+-doped ZnO-BaO-B2O3-TeO2 borotellurite glasses prepared using the melt-quenching technique. The glasses were annealed at 350°C for varying durations of 2, 4, 6, 8, and 10 hrs. The investigation revealed that density and refractive index decreased with increasing annealing time up to 8 hrs but increased after 10 hrs, inversely correlating with molar volume. Structural analysis using X-ray diffraction confirmed an amorphous phase, while FTIR spectroscopy identified characteristic vibrations of TeO4, BO4, and BO3 units, which diminished with longer annealing times. Optical properties, assessed via UV-Vis-NIR absorption spectroscopy, displayed transitions from the ground state 6H5/2 to various excited states. Luminescence studies indicated that the sample annealed for 8 hrs exhibited the highest luminescence, emitting orange light. Chromaticity coordinates were determined using the CIE 1931 color space. The shortest luminescence decay time was 0.863 ms for the 10 hrs annealed sample, while the longest was 0.873 ms for the 6 hrs sample. These findings elucidate the impact of annealing time on the material properties of Sm3+-doped borotellurite glasses, underscoring their potential for photonic applications.
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