Abstract
Poly-crystals of praseodymium phosphate MIPr(PO3)4 (MI = Na, Li, K) and PrP5O14 have been synthesized by the flux method. All of these hosts crystallized in the monoclinic structures with different space groups. The spectroscopic properties of trivalent praseodymium ions in these compounds have been characterized. The emission spectra under laser excitation at 488 nm show several characteristic emission bands of Pr3+ resulting from intra-configurational transitions between 3P0 and 4f2 lower lying levels. All the studied compounds exhibit two strong parity-allowed 4f15 d1→4f2 emission bands located in the near ultraviolet domain using electrons as source for optical excitation. Therefore, these materials are of interest for applications in lighting and scintillating applications.
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