Design and Development of Dysprosium‐Doped Phospho‐Tellurite Glass for White Light‐Emitting Diodes and Laser Applications

This research delves into the multifaceted properties of dysprosium‐doped phospho‐tellurite glass, highlighting its physical, structural, optical, and luminescence characteristics. X‐ray diffraction analysis is employed to confirm the amorphous nature of the sample, while Fourier transform infrared spectroscopy is utilized to identify the vibrations of functional groups within the glass matrix. Optical properties are investigated through absorption spectra, revealing distinct peaks corresponding to transitions from the 6 H 15/2 ground state to the 6 F 3/2,5/2,7/2,9/2,11/2 , and 6 H 11/2 excited states. Luminescence analysis identified two primary emission peaks at 4 F 9/2 → 6 H 15/2 (blue) and 4 F 9/2 → 6 H 13/2 (yellow) transitions. The combination of these emissions produced white light, which is validated for use in white light‐emitting diodes using Commission Internationale de l'Éclairage chromaticity coordinates. Additionally, Judd–Ofelt parameter analysis reinforced the material's promising potential for laser applications.