A Promising Deep Red Phosphor AgLaMo2O8:Pr3+ with Blue Excitation for White LED Application

A deep red phosphor AgLaMo2O8:Pr3+ has been prepared by a conventional solid-state reaction technique. The effects of synthesis temperature and Pr3+-doped concentration on the luminescent properties and crystal structures of the compound have been investigated. Its excitation wavelength ranging from 440 to 500 nm fits well with the characteristical emission of commercial blue light-emitting diode (LED) chips. The photoluminescence spectra of AgLaMo2O8:Pr3+ exhibit deep red emissions, with the strongest emission peak at 649 nm, and show high color purity properties with the color point of (0.685, 0.315). Due to its good excitation and emission performance, the Pr3+-doped AgLaMo2O8 phosphor may be a promising candidate for white LEDs.