Abstract
AbstractA series of crystals of ternary lanthanide halides K2LaX5 (X = Cl,Br,I) doped with Pr3+ were synthesized, crystals grown using the Bridgman method, and their optical properties were studied. Apart from fundamental Pr3+ emission, up‐conversion emission was detected in these crystals. Some features in the up‐conversion fluorescence vary in the series of halides (Cl, Br, I). Non‐radiative energy transfer between Pr3+ ions is observed and up‐conversion mechanisms are proposed.
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