Search for: All records

We report results of the optical properties of Dy-doped CsPbCl₃and KPb₂Cl₅bulk crystals for potential applications in yellow solid-state laser development. The crystals were synthesized from purified starting materials and melt-grown by vertical Bridgman technique. Optical transmission measurements revealed characteristic absorption bands from intra-4f transitions of Dy³⁺ions. Direct optical excitation at 455 nm (⁶H_15/2→⁴I_15/2) resulted in dominant yellow emission bands at ∼575 nm from the⁴F_9/2excited state of Dy³⁺ions. In addition, both crystals exhibited weaker emission lines in the blue (∼483 nm) and red (∼670 nm) regions. The peak emission-cross sections for the yellow transition (⁴F_9/2→⁶H_13/2) were determined to be ∼0.22 × 10⁻²⁰cm²for Dy: CsPbCl₃(λ_peak= 576.5 nm) and ∼0.59 × 10⁻²⁰cm²for Dy: KPb₂Cl₅(λ_peak= 574.5 nm). The spectral properties and decay dynamics of the⁴F_9/2excited state were evaluated within the Judd-Ofelt theory to predict total radiative decay rates, branching ratios, and emission quantum efficiencies.