Static energy transfer for Mn : Pr system in Phosphate glasses

The process of energy transfer from divalent manganese to trivalent praseodymium ions is studied with the help of Forster–Dexter theory. Some of the important energy transfer parameters such as transfer probability (P_SA), quantum yield of energy transfer (μ), critical radius (R₀) and critical concentration of the acceptor (C_A) are evaluated for the energy transfer pairs Mn²⁺ : Pr³⁺, Pr³⁺ : Pr³⁺ in phosphate glasses. The transfer of energy from Mn²⁺ to Pr³⁺ was confirmed by recording the fluorescence decay curves of Mn²⁺ emission corresponding to various activator concentrations which show a non-exponential behaviour. Large values of transfer probabilities and transfer efficiencies suggest that Mn²⁺ ion can act as a good sensitizer to Pr³⁺ ion in phosphate glass.