Spectral-Luminescent and Optical Properties of Antimony-Doped Yttrium–Alumoborate Glasses

Abstract

Fused Y₂O₃–Al₂O₃–B₂O₃ glasses with Sb₂O₃ additives have been synthesized and their spectral-luminescent and optical properties were studied. The doping leads to the appearance strong UV absorption and a decrease in the optical band gap width and Urbach energy. The luminescence of these glasses is represented by a broad, weaklystructured band extending from the near-UV to the near-IR spectral regions and has been attributed to superposition of the ³P₁ → ¹S₀ bands of different types of Sb³⁺ optical sites and the Sb³⁺ → Sb⁵⁺ charge transfer band. The quantum yield of this luminescence at room temperature and band-to-band excitation for the weakly-doped glass is close to 20%. The luminescence decay was studied at 298 and 77 K and the reasons preventing a greater quantum yield were considered.