Abstract
The spectroscopic properties in VUV-Vis range for the eulytite structural phosphors Sr 3Gd(PO 4) 3: Ln 3+ ( Ln 3+=Ce 3+, Pr 3+, Tb 3+), Sr 3Ce(PO 4) 3, Sr 3Gd(PO 4) 3 and Sr 3Tb(PO 4) 3 were investigated. The bands near 170 nm in VUV excitation spectra are assumed to connect with the host lattices related absorption. The f– d transitions of Ce 3+, Pr 3+ and Tb 3+ in the host lattices are assigned and corroborated. A convenient experiment formulation on the relationship between the lowest f– d transition energies and n value for trivalent 4 f n -series rare earth ions in these host lattices is applied.
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