Preparation and luminescence property of Dy3+-doped YPO4 phosphors

The co-precipitation reaction soft chemistry method was employed to prepare fine YPO4:Dy3+ phosphor particles calcined at 950 °C. Adjusting appropriate pH and introducing lithium may greatly affect the particle size of the product and further affect the luminescence intensity. The as-prepared samples were characterized by X-ray diffraction (XRD), transmission electron micrograph (TEM) and photoluminescence (PL) spectroscopy. The obtained YPO4 nanocrystals appeared to be spherical with some agglomeration and their sizes ranged from 20 to 40 nm. The characteristic transitions of Dy3+ due to 4F9/2→6H15/2 (blue) and 4F9/2→6H13/2 (yellow) were detected in the emission spectra.