Comparative spectroscopic investigation of Dy3+ ions in different sesquioxide solid solution ceramics

Abstract A comparative study of the spectroscopic properties of LuScO 3 :Dy, LuYO 3 :Dy, and YScO 3 :Dy was conducted to evaluate their application prospects in yellow laser generation. The absorption cross sections of Dy‐doped LuScO 3 , LuYO 3 , and YScO 3 at 446 nm were calculated to be 0.67, 1.51, and 1.05 × 10 −21 cm 2 , respectively. The Judd–Ofelt ( J – O ) theory was used to determine the J – O parameters as well as the spontaneous transition probability and fluorescence branching ratios. The fluorescence spectra of LuScO 3 :Dy, LuYO 3 :Dy, and YScO 3 :Dy were dominated by yellow emission corresponding to the 4 F 9/2 → 6 H 13/2 transition, with cross sections of 0.78, 1.10, and 0.76 × 10 −20 cm 2 , respectively. The Inokuti–Hirayama model was applied to fit the non‐exponential decay curve of Dy‐doped sesquioxide solid solution ceramics in order to investigate the process of energy transfer. The impact of bond length and distortion degree on spectral properties and energy‐transfer parameters was investigated. It was concluded that among Dy‐doped sesquioxide solid solutions, LuYO 3 :Dy ceramics are the most promising materials for generating yellow lasers.