Synthesis and photoluminescence properties of new NaAlSiO4:Eu2+ phosphors for near-UV white LED applications

A new NaAlSiO4:0.1Eu2+ phosphors were synthesized at different temperatures using a liquid phase precursor (LPP) technique. The XRD patterns indicate the presence of hexagonal nepheline phase for all the samples. The synthesized phosphors can be excited efficiently in the broad near-UV region. The PL emission spectra showed a broad emission peak at around 551 nm corresponding to 5d → 4f transition of Eu2+ ions. The synthesized phosphors showed better thermal stability when compared with the standard YAG:Ce3+ phosphor.

► A novel greenish yellow phosphor NaAlSiO4:Eu2+ has been synthesized by a new technique.
► The photoluminescence properties were found to be influenced by the crystal structure of the phosphors.
► The broad excitation wavelength and good emission properties suggest their potential applications in near-UV white LEDs.
► Thermal stability of the phosphor was better than the standard YAG:Ce3+ phosphor.