Abstract
Owing to their various emission bands in the mid-IR region, Pr3+ ion-doped materials are expected to be a potential candidate as laser media. In this work, Pr3+ ion-doped Ge22Sb8Se70−2x(GaI)x (x = 1–5) chalcogenide glasses were prepared for investigation of the mid-IR spectroscopic properties. The glass structure and the optical, thermal, and luminescent properties were investigated. The 0.2–1.5 mol% Pr3+-doped Ge-Sb-Se-Ga-I bulk glass exhibited intense photoluminescence in the wavelength range of 3.5–5.5 μm under 1.55 μm light excitation. By heat treating the precursor glass at 30 °C above its glass transition temperature (Tg) for different durations, GeSe2 and Sb2Se3 nanocrystals were precipitated into the glass. After heat treatment, the 3.5–5.5 μm emission intensity of glass enhanced and reached the maximum after 10 h of heat treatment.
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