Luminescence emitted from a neodymium pentaphosphate crystal excited by radiation from a light-emitting diode

A report is given of the growth method and some physicochemical properties of neodymium pentaphosphate (NdP₅O₁₄) samples whose luminescence was excited by radiation from a GaP_xAs_1–x light-emitting diode with x = 0.008 (λ ≈ 810 nm at 77°K). Narrow luminescence bands of the Nd³⁺ ions were observed in the region of 900 and 1060 nm when the power density of the exciting radiation was 0.03–3.3 W/cm³.